Low emissions electronic smoking device

[0001] This application claims priority to U.S. Provisional Application No. 62/452,871, filed Jan. 31, 2017 and entitled “LOW EMISSIONS ELECTRONIC SMOKING DEVICE,” which is hereby incorporated by reference in its entirety as if fully set forth herein.

[0002] The present technology relates to the field of electronic smoking devices. More particularly, the present technology relates to a low emissions electronic smoking device.

[0003] Smoking plant material has been practiced in numerous cultures for many centuries. However, as scientific and medical evidence has mounted regarding the environmental and health risks of smoking emissions (e.g., second-hand smoke), traditional smoking of tobacco or other plant-based materials has been banned in many public spaces. Furthermore, social norms have generally come to discourage smoking in any venue in which others may be affected by smoking emissions.

[0004] Electronic smoking devices, commonly known as e-cigarettes, vaporizers, or vapes, have grown in popularity to replace or supplement traditional smoking mediums, such as cigarettes or pipes. Electronic smoking devices have generally been purported to be healthier than, for example, traditional cigarettes. Electronic smoking devices have also generally been purported to have fewer harmful emissions than traditional smoking mediums. However, electronic smoking devices do still cause emissions, which may potentially pose a health and/or environmental risk, and may be viewed negatively in a public or social environment.

[0005] In one embodiment, the present disclosure can be embodied in an electronic smoking device comprising a mouthpiece; a vaporizer portion in communication with the mouthpiece; a filter cartridge assembly in communication with the mouthpiece; an inlet check valve; and an outlet check valve. The vaporizer portion comprises a heating element for heating a smoking material housed within the vaporizer portion. The inlet check valve permits air to be inhaled from the vaporizer portion into the mouthpiece, but substantially prohibits air from being exhaled through the mouthpiece into the vaporizer portion. The outlet check valve permits air to be exhaled through the mouthpiece into the filter cartridge assembly, but substantially prohibits air from being inhaled from the filter cartridge assembly into the mouthpiece.

[0006] In an embodiment, the inlet check valve is a one-way valve which opens when a user inhales from the mouthpiece, and seals when the user exhales into the mouthpiece.

[0007] In an embodiment, the outlet check valve is a one-way valve which opens when a user exhales into the mouthpiece, and seals when the user inhales from the mouthpiece.

[0008] In an embodiment, the outlet check valve is contained within the filter cartridge assembly.

[0009] In an embodiment, the filter cartridge assembly is a replaceable component of the electronic smoking device.

[0010] In an embodiment, the inlet check valve is contained within the vaporizer portion.

[0011] In an embodiment, the vaporizer portion comprises a replaceable vaporizer cartridge assembly for housing the smoking material, and the inlet check valve is contained within the replaceable vaporizer cartridge assembly.

[0012] In an embodiment, the filter cartridge assembly comprises: an outer body; a porous filter housed within the outer body; an inlet cap secured to a first end of the outer body; and a vent cap secured to a second end of the outer body.

[0013] In an embodiment, the outlet check valve is secured between the outer body and the vent cap.

[0014] In an embodiment, the porous filter comprises a mesh filter.

[0015] In an embodiment, the mesh filter is a stainless steel filter or a polymer mesh filter.

[0016] In an embodiment, the filter cartridge assembly further comprises a HEPA filter surrounding the mesh filter.

[0017] In another embodiment, the present disclosure may also be embodied in a filter cartridge assembly for filtering emissions blown into an electronic smoking device. The filter cartridge assembly comprises an inlet cap in communication with a mouthpiece of the electronic smoking device for receiving air exhaled into the electronic smoking device; a porous filter in communication with the inlet cap such that substantially all air that is blown into the filter cartridge assembly passes through the porous filter; and an outlet check valve which permits air to be blown into the filter cartridge assembly and substantially prohibits air from being inhaled out of the filter cartridge assembly.

[0018] In an embodiment, the porous filter comprises a mesh filter.

[0019] In an embodiment, the mesh filter comprises at least one of a stainless steel material or a polymer material.

[0020] In an embodiment, the filter cartridge assembly further comprises a HEPA filter surrounding the mesh filter.

[0021] In an embodiment, the outlet check valve is a one-way valve which opens when a user exhales into the filter cartridge assembly, and seals when the user inhales.

[0022] In an embodiment, the filter cartridge assembly further comprises an outer body housing the porous filter; and a vent cap secured to a first end of the outer body. The inlet cap is secured to a second end of the outer body opposite the first end. The outlet check valve permits air to be blown into the inlet cap, through the outer body, and out the vent cap, and substantially prohibits air from being inhaled into the vent cap, through the outer body, and out the inlet cap.

[0023] In an embodiment, the outlet check valve is positioned within the outer body between the inlet cap and the vented outlet cap.

[0024] In yet another embodiment, the present disclosure may be embodied in an electronic smoking device comprising a mouthpiece; a vaporizer portion in communication with the mouthpiece; and a filter cartridge assembly in communication with the mouthpiece. The vaporizer portion comprises a replaceable vaporizer cartridge assembly configured to house a smoking material; a heating element for heating the smoking material housed within the replaceable vaporizer cartridge assembly; and an inlet check valve which permits air to be inhaled from the replaceable vaporizer cartridge assembly into the mouthpiece and substantially prohibits air from flowing from the mouthpiece into the replaceable vaporizer cartridge assembly. The filter cartridge assembly comprises one or more filters and an outlet check valve which permits air to be exhaled from the mouthpiece into the filter cartridge assembly and substantially prohibits air from being inhaled from the filter cartridge assembly into the mouthpiece.

[0025] The present disclosure may also be embodied in one or more methods for using, assembling, and/or making the various electronic smoking devices and filter cartridge assemblies described herein.

[0026] Other features and advantages of the invention should become apparent from the following description of the preferred embodiments, taken in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of the invention.

[0070] The figures depict various embodiments of the disclosed technology for purposes of illustration only, wherein the figures use like reference numerals to identify like elements. One skilled in the art will readily recognize from the following discussion that alternative embodiments of the structures and methods illustrated in the figures can be employed without departing from the principles of the disclosed technology described herein.

Low Emissions Electronic Smoking Device

[0071] Smoking plant material has been practiced in numerous cultures for many centuries. However, as scientific and medical evidence has mounted regarding the environmental and health risks of smoking emissions (e.g., second-hand smoke), traditional smoking of tobacco or other plant-based materials has been banned in many public spaces. Furthermore, social norms have generally come to discourage smoking in any venue in which others may be affected by smoking emissions.

[0072] Electronic smoking devices, commonly known as e-cigarettes, vaporizers, or vapes, have grown in popularity to replace or supplement traditional smoking mediums, such as cigarettes or pipes. Electronic smoking devices have generally been purported to be healthier than, for example, traditional cigarettes. Electronic smoking devices have also generally been purported to have fewer harmful emissions than traditional smoking mediums. However, electronic smoking devices do still cause emissions, which may potentially pose a health and/or environmental risk, and may be viewed negatively in a public or social environment.

[0073] Therefore, a need exists for an electronic smoking device that reduces, minimizes, and/or altogether eliminates harmful or undesirable emissions. Previous works by the inventors of the present disclosure have presented improvements for addressing some of the problems discussed above. These works include U.S. Pat. No. 9,402,422 to Shenkal, filed Nov. 3, 2014, issued Aug. 2, 2016, and entitled “Hybrid E-Cigarette/Vaporizer with Exhale Filter Capability,” and U.S. patent application Ser. No. 15/070,186 to Shenkal et al., filed Mar. 15, 2016, entitled “E-Cigarette With Valve Allowing Exhale Filter,” the entire contents of which are hereby incorporated by reference as if fully set forth herein. The present disclosure provides for additional variations and improvements on low emissions (or zero emissions) electronic smoking devices capable of filtering smoking emissions.

[0074] FIG. 1A illustrates a perspective view of an electronic smoking device 100, according to an embodiment of the present disclosure. FIG. 1B illustrates an exploded view of the electronic smoking device 100, according to an embodiment of the present disclosure. The electronic smoking device 100 includes a mouthpiece 102 secured to a mid-enclosure 104. In the example embodiment shown, the mouthpiece 102 has a curved design that is designed to ergonomically seal against a user's mouth while allowing for maximum inhale and/or exhale. In certain embodiments, the mouthpiece 102 can be a disposable and/or replaceable component. Further, in various embodiments, the mouthpiece 102 can be imbued with various flavors and/or scents (e.g., by impregnating the material of the mouthpiece 102). The mid-enclosure 104 houses a cooker chamber 107. The cooker chamber 107 is configured to contain a material to be heated and vaporized, such as liquid, oil, flower, or leaf material. The cooker chamber 107 can comprise a transparent material (such as glass or clear plastic), and the mid-enclosure 104 can include a transparent portion 109 (or a cut-out portion) so that a user can view the material contained within the cooker chamber 107.

[0075] The cooker chamber 107 includes a coil 106 to heat material contained within the cooker chamber 107. The coil 106 is in electronic communication with a printed circuit board (PCB)/battery 110, which is housed within an electronics housing 108. The PCB/battery 110 provides electrical power to the coil 106 to heat the coil 106, and also has circuitry to control various functions of the electronic smoking device 100. These functions may be controlled by a user using various inputs provided on the electronics housing 108. For example, the electronics housing 108 has an igniter button 120, which causes power to be transmitted to the coil 106, thereby heating the coil 106 and vaporizing the material contained in the cooker chamber 107. The electronics housing 108 also includes a display 122 for displaying information, such as a current wattage or charge level of the electronic smoking device 100. The electronics housing 108 includes buttons 124, 126 for selecting various options. For example, the buttons 124, 126 can be used to set a wattage for the electronic smoking device 100. The electronics housing 108 also includes a micro-USB charging port 128 for charging the PCB/battery 110. A bottom cover 112 encloses the PCB/battery 110 within the electronics housing 108.

[0076] The electronic smoking device 100 comprises a vaporizer portion, which, in one embodiment, comprises the cooker chamber 107, the coil 106, the electronics housing 108, and the PCB/battery 110. The vaporizer portion allows a user to heat and inhale vaporized material. The electronic smoking device 100 also includes a filter portion, which comprises a filter cartridge assembly 114. The filter cartridge assembly 114 allows a user to exhale emissions back into the electronic smoking device 100 to filter out odors and/or particulate matter in the emissions. As such the vaporizer portion can be considered to provide an “inhale” function of the electronic smoking device 100, while the filter cartridge assembly 114 and/or the filter portion can be considered to provide an “exhale” function of the electronic smoking device 100. As will be described in greater detail below, a user can both inhale vaporized material and exhale emissions via the mouthpiece 102.

[0077] As can be seen in FIG. 1B, and described in greater detail herein, the filter cartridge assembly 114 can be secured to the mouthpiece 102 by inserting the filter cartridge assembly 114 through the bottom cover 112, the electronics housing 108, and the mid enclosure 104. In the depicted embodiment, the filter cartridge assembly 114 is inserted into and/or removed from the electronic smoking device 100 through the bottom of the electronic smoking device 100. In certain embodiments, the filter cartridge assembly 114 may be disposable and/or replaceable, such that when a filter cartridge assembly 114 is no longer effective or less effective (e.g., due to overuse), it can be replaced with a new one.

[0078] FIG. 2A illustrates a front plan view of the electronic smoking device 100. FIG. 2B illustrates a cross-sectional view of the electronic smoking device 100 of FIG. 2A taken along line 2B-2B of FIG. 2A, according to an embodiment of the present disclosure. In FIG. 2B, it can be seen that the filter portion comprising the filter cartridge assembly 114 occupies one side of the electronic smoking device 100, and the vaporizer portion 200 occupies the other side of the electronic smoking device 100. When a user inhales on the mouthpiece 102, vaporized material is pulled up into the user's mouth from the cooker chamber 107. When a user exhales into the mouthpiece 102, emissions from the user's mouth are directed into the filter cartridge assembly 114. As the emissions work through the various filtration mechanisms contained in the filter cartridge assembly 114 (various embodiments of which will be described in greater detail herein), odors and/or particulate matter are filtered out. Filtered emissions which are substantially free of odors and/or particular matter are then expelled out of the bottom of the filter cartridge assembly 114.

[0079] It can be appreciated that using a single mouthpiece for both inhalation of vaporized material and exhalation of emissions can pose various challenges. For example, when a user inhales, only vaporized material from the cooker chamber 107 should be pulled up through the mouthpiece 102. The user should not be exposed to emissions that have been previously blown into the filter cartridge assembly 114. Similarly, when a user exhales, the user's exhaled emissions should be diverted to the filter cartridge assembly 114, and such emissions should not enter the cooker chamber 107. Furthermore, emissions diverted to the filter cartridge assembly 114 should pass through the filter cartridge assembly 114 with little to no leakage of unfiltered emissions, as leakage of unfiltered emissions would be contrary to the low emissions/zero emissions goal of the present disclosure.

[0080] In order to carry out these functions, in the embodiment shown in FIGS. 2A-2C, a diverter valve 210 is utilized to ensure that only vaporized material is inhaled by the user, and that exhaled emissions are correctly and effectively routed into the filter cartridge assembly 114. FIG. 2C illustrates a close-up view of the cross-sectional view shown in FIG. 2B defined by the area 2C-2C of FIG. 2B. FIG. 2C provides a close-up view of the diverter valve 210. The diverter valve 210 is sealed against the mouthpiece 102 so as to prevent any undesirable leakage of emissions from the filter cartridge assembly 114 and/or vaporized material from the cooker chamber 107. In certain embodiments, the diverter valve 210 includes two one-way valves: an inlet check valve 212 and an outlet check valve 214. The inlet check valve 212 is a one way valve that allows vapors to escape the cooker chamber into the mouthpiece 102 on inhale, but substantially blocks and/or prohibits emissions from entering the cooker chamber from the mouthpiece 102 on exhale. The outlet check valve 214 is a one way valve that allows exhaled emissions to enter from the mouthpiece 102 into the filter cartridge assembly 114, but substantially blocks and/or prohibits emissions from exiting the filter cartridge assembly 114 into the mouthpiece 102 on inhale.

[0081] In the depicted embodiment, the inlet check valve 212 is implemented using a one-way umbrella valve. When a user inhales on the mouthpiece 102, the pressure differential caused by the inhalation causes a body portion of the umbrella valve to lift away from a base portion, thereby allowing vaporized materials to move from the cooker chamber 107 into and out of the mouthpiece 102. However, when a user exhales into the mouthpiece 102, the body portion of the umbrella valve is pushed into the base portion. This causes the body portion to become seated within the base portion and closes the inlet check valve 212, thereby preventing any emissions from entering the cooker chamber 107 from the mouthpiece 102.

[0082] In the depicted embodiment, the outlet check valve 214 is implemented using a duckbill valve. The duckbill valve includes two or more flaps that meet at a point (220). When a user inhales on the mouthpiece 102, the flaps are pulled towards one another, thereby closing the outlet check valve 214. As such, inhalation will not cause any emissions to escape from the filter cartridge assembly 114 into the mouthpiece 102. When the user exhales into the mouthpiece 102, the flaps are pushed apart, creating an opening at the end point 220 and allowing exhaled emissions to flow from the mouthpiece 102 through the outlet check valve 214 into the filter cartridge assembly 114.

[0083] Although the example embodiments and figures depict the inlet check valve 212 as an umbrella valve, and the outlet check valve 214 as a duckbill valve, it should be understood that, in various embodiments, both the inlet check valve 212 and the outlet check valve 214 can be implemented using any one-way valve.

[0084] It can be seen in FIG. 2C that the inlet check valve 212 is tilted towards the outlet check valve 214. This angling of the inlet check valve 212 allows for any non-gaseous emissions (e.g., spit, resins, etc.) to be pulled towards the outlet check valve 214 and into the filter cartridge assembly 114 by gravitational forces. In certain scenarios, if the inlet check valve 212 is not angled towards the outlet check valve 214, liquids and sticky resins can become trapped within the mouthpiece 102, which can cause undesirable buildup of waste materials within the mouthpiece 102.

[0085] FIGS. 3A-C provide various cross-sectional views of the mouthpiece 102, the inlet check valve 212, and the outlet check valve 214.

[0086] FIG. 4 illustrates an exploded via of an example filter cartridge assembly 400, in accordance with an embodiment of the present disclosure. In certain embodiments, the filter cartridge assembly 400 of FIG. 4 can be used as the filter cartridge assembly 114 of FIG. 1B.

[0087] The filter cartridge assembly 400 includes an open-ended tubular, cylindrical main enclosure body 414, which is at least partially enclosed at the top by an inlet cap 402 and at least partially enclosed at the bottom by a vented outlet cap 422. Between the inlet cap 402 and the vented outlet cap 422, and housed within the main enclosure body 414, are various filtering mechanisms that assist in removing odors and particulate matter from emissions blown into the filter cartridge assembly 400. Emissions are received into the filter cartridge assembly 400 via the inlet cap 402. Once the emissions pass through various filtering mechanisms housed within the main enclosure body 414, clean, filtered emissions are emitted via the vented outlet cap 422.

[0088] The inlet cap 402 can be configured to form an airtight seal with the outlet check valve 214 (see FIGS. 2B, 2C, 3A, 3B, 3C) to ensure that emissions that have entered the filter cartridge assembly 400 do not leak at the inlet cap/outlet check valve juncture. For example the inlet cap 402 can include threads that can be secured to corresponding threads surrounding the outlet check valve 214. The inlet cap 402 can also include an O-ring 404 to further ensure a tight seal between the inlet cap 402 and the outlet check valve 214.

[0089] Below the inlet cap 402 is a mesh screen 406. The mesh screen 406 acts as a demister and assists in condensing vapor emissions into condensate. The mesh screen 406, and any other components described herein, can be made from any appropriate materials. For example, in certain embodiments, the mesh screen 406 can be made of stainless steel or plastic. Below the mesh screen 406 is an air separator inlet 408. The mesh screen 406 can be sized to substantially cover a top opening of the air separator inlet 408. The air separator inlet 408 is an elongated tube that is divided into sections by partition walls that run through substantially the length of the air separator inlet 408. The partition walls are more clearly shown in FIG. 5C. The partition walls within the air separator inlet 408 divide exhaled emissions into various sections, and provide surface area that encourages further condensation of the emissions. The air separator inlet 408 feeds into a venturi reaction chamber 412. Positioned between the air separator inlet 408 and the venturi reaction chamber 412 is a polyester felt filter 410. The polyester felt filter 410 absorbs some portion of the condensate that has already formed, and also filters out some particulate matter in the emissions. In certain embodiments, the polyester felt filter 410 is a 1 micron polyester felt filter.

[0090] Emissions then enter the venturi reaction chamber 412, which is a funnel-shaped tube having a wider mouth portion that narrows into a narrower stem portion. This narrowing causes the emissions to accelerate through the venturi reaction chamber 412. As emissions accelerate through the venturi reaction chamber 412, additional air is pulled into the venturi reaction chamber 412 through openings 413 proximate a top end of the stem of the venturi reaction chamber 412. As will be described in greater detail below, the design of the venturi reaction chamber 412 assists in keeping emissions trapped within the filter cartridge assembly 400 for a longer period of time, thereby increasing the effectiveness with which the emissions can be filtered.

[0091] The narrower stem portion of the venturi reaction chamber 412 is surrounded by a cylindrical mesh filter 416. The stem portion of the venturi reaction chamber 412 and the cylindrical mesh filter 416 are inserted into a diverter 418. The diverter 418 is surrounded by a ribbed enclosure 419. The ribbed enclosure 419 centers the diverter 418 within the main enclosure body 414. The openings in the ribbed enclosure 419 allow emissions to circulate around the area between the outer surface of the diverter 418 and the inner surface of the main enclosure body 414.

[0092] It can be seen in FIG. 4 that the diverter 418 has a cylindrical body, and a conical bottom portion. The diverter 418 is enclosed on the bottom and open on the top. As emissions exit the stem of the venturi reaction chamber 412, they are directed towards and reflected off of the conical bottom portion of the diverter 418 back up into the cylindrical body of the diverter 418. As emissions flow through the cylindrical body of the diverter 418, the cylindrical mesh filter 416 encourages the emissions to condense into condensate. Some of the remaining emissions are pulled back into venturi reaction chamber 412 via openings 413, while some emissions are permitted to escape out of the top of the diverter 418. Any emissions that escape out of the top of the diverter 418 eventually travel downwards around the outer surface of the diverter 418 (via openings in the ribbed enclosure 419) towards a HEPA filter 420. In some embodiments, the HEPA filter 420 is a 0.25 micron HEPA filter. In certain embodiments, a carbon filter can be layered with the HEPA filter 420 to assist in removing any remaining odors. The HEPA filter 420 (and a carbon filter if there is one) can be secured between the vented outlet cap 422 and the ribbed enclosure 419. Once they have passed through the HEPA filter 420, filtered emissions exit the filter cartridge assembly 400 via the vented outlet cap 422.

[0093] FIG. 5A illustrates a plan view of the filter cartridge assembly 400. FIG. 5B illustrates a cross-sectional view of the filter cartridge assembly 400 along the line 5B-5B of FIG. 5A, and FIG. 5C illustrates a cross-sectional view of the filter cartridge assembly 400 along the line 5C-5C of FIG. 5A. FIG. 5B illustrates the filter cartridge assembly in its fully assembled form. FIG. 5C illustrates the partition walls that are formed within the air separator inlet 408.

[0094] FIG. 6A illustrates a plan view of the filter cartridge assembly 400, and FIG. 6B illustrates a cross-sectional view of the filter cartridge assembly 400 along the line 6B-6B of FIG. 6A. FIG. 6B includes arrows to indicate how emissions work their way through the filter cartridge assembly 400, as was previously described above with reference to FIG. 4. Emissions are blown into a mouthpiece of an electronic smoking device, and pass through an outlet check valve. Once through the outlet check valve, emissions enter the filter cartridge assembly 400 via an inlet 402. The emissions then pass through a mesh screen/demister 406, and then through an air separation inlet 408. After exiting the air separation inlet 408, emissions pass through a polyester felt filter 410 into a mouth portion of a venturi reaction chamber 412. Emissions accelerate through a narrower stem portion of the venturi reaction chamber 412. As emissions accelerate through the venturi reaction chamber 412, surrounding air inside the filter cartridge assembly 400 is pulled into the venturi reaction chamber 412 via openings 413. As emissions exit the bottom stem portion of the venturi reaction chamber 412, they bounce off of a conical bottom portion of a diverter 418. Emissions bounce off the conical bottom portion of the diverter 418 into a cavity 417 defined by an outer surface of the venturi reaction chamber 412 and an inner surface of the cylindrical body of the diverter 418. Also contained within the cavity 417 is a cylindrical mesh filter 416. As emissions travel up through the cavity 417, the cylindrical mesh filter 416 causes some of the emissions to condense into condensate. Some emissions within the cavity 417 are pulled back into the venturi reaction chamber 412 via openings 413, while some emissions escape out of the top of the diverter 418. Emissions that escape out of the top of the diverter 418 are directed back down into an outer cavity 421 defined by the inner surface of an outer enclosure 414 and the outer surface of the diverter 418, towards a HEPA filter and/or charcoal filter 420. Emissions then exit the filter cartridge assembly 400 via a vented outlet cap 422.

[0095] FIG. 6C illustrates a cross-sectional view of the filter cartridge assembly 400 along the line 6C-6C of FIG. 6A. As noted previously, the HEPA filter 420 is secured between the vented outlet cap 422 and the ribbed enclosure 419 (see FIG. 4). However, in order for a HEPA filter 420 to work effectively, there must be sufficient surface area of the HEPA filter 420 exposed so that emissions can pass through the HEPA filter 420. As such, narrow strips of material (e.g., ribs) can be utilized to secure the HEPA filter 420 in place between the vented outlet cap 422 and the ribbed enclosure 419 while still ensuring sufficient open surface area for emissions to pass through and be filtered. In certain embodiments, no more than 23.5% of the HEPA filter 420's surface area should be covered, such that emissions can pass through at least 76.5% of the HEPA filter's surface area. For example, if the total surface area of the HEPA filter 420 shown in FIG. 6C is approximately 0.460 sq. in., no more than 0.108 sq. in. of the HEPA filter 420's surface should be covered/obstructed by the vented outlet cap 422 and the ribbed enclosure 419.

[0096] FIG. 7A illustrates an exploded view of a filter cartridge assembly 700, in accordance with an embodiment of the present disclosure. In certain embodiments, the filter cartridge assembly 700 can be used as the filter cartridge assembly 114 of FIG. 1B. Filter cartridge assembly 400, discussed above, utilized a combination of condensator design and filters to both condense emissions into condensate and filter out particulates and odors. Filter cartridge assembly 700, which is depicted in FIGS. 7-9, utilizes more of a capillary filtration approach. As can be seen in FIG. 7A, the filter cartridge assembly 700 has, similar to the filter cartridge assembly 400, a main enclosure body 706 sealed at the top by an inlet cap 702 and at the bottom by a vented outlet cap 710. Housed within the main enclosure body 706 is a concentric 4-stage filter 704.

[0097] FIG. 7B illustrates an exploded view of the concentric 4-stage filter 704. The concentric 4-stage filter 704 includes an inner mesh substrate 712, surrounded by a large-diameter foam 714 (in this example, a 1 micron foam), which is surrounded by an outer mesh substrate 716, which is surrounded by a small-diameter foam 718 (in this example, a 0.25 micron foam). These four, concentric layers are secured to a base 720. As will be described in greater detail with reference to FIGS. 8 and 9, when emissions enter the concentric 4 stage filter 704, they are pushed outwards, away from a central axis of the concentric 4 stage filter 704. As emissions are pushed outwards, they must pass through the four layers of the concentric 4-stage filter 704. Each layer filters and/or condenses the emissions to remove particulate matter and odors. While the example embodiment presented has four concentric layers, it should be understood that fewer or more concentric layers can be used.

[0098] As seen in FIG. 7A, a HEPA filter 708 is secured between the base 720 and the vented outlet cap 710. Once emissions have passed through the concentric 4 stage filter, they pass through the HEPA filter 708 and clean, filtered emissions exit the vented outlet cap 710. As discussed above, narrow ribs on the base 720 and the vented outlet cap 710 can secure the HEPA filter 708 in place while still allowing for sufficient open surface area that emissions can pass through the HEPA filter 708.

[0099] FIG. 8A illustrates a plan view of the filter cartridge assembly 700. FIG. 8B illustrates a cross-sectional view of the filter cartridge assembly 700 taken along line 8B-8B of FIG. 8A. FIG. 8C illustrates a cross-sectional view of the filter cartridge assembly 700 taken along line 8C-8C of FIG. 8A. As can be seen in the figures, there are four layers of porous, filtering materials (alternating layers of mesh screens and foams) through which emissions can pass to be filtered.

[0100] FIG. 9A illustrates a plan view of the filter cartridge assembly 700. FIG. 9B illustrates a cross-sectional view of the filter cartridge assembly 700 taken along line 9B-9B of FIG. 9A. FIG. 9C illustrates a cross-sectional view of the filter cartridge assembly 700 taken along line 9C-9C of FIG. 9A.

[0101] FIG. 9B illustrates a general airflow path taken by emissions as they pass through the filter cartridge assembly 700. Emissions enter through the top of the filter cartridge assembly 700, and enter an inner cavity 902. In certain embodiments, as seen in FIGS. 8C and 9C, the inner cavity 902 may be divided into one or more segments by one or more partitions. The lower end of the inner cavity 902 is sealed by the base 720, and the top of the filter cartridge assembly 700 is sealed by an exhale check valve (such as the outlet check valve 214 of FIGS. 2-3). As such, emissions are forced through the porous filtering layers of the concentric 4 stage filter 704 which define the lateral walls of the inner cavity 902. As a user exhales into the filter cartridge assembly 700, emissions are forced through the inner mesh substrate 712, the large diameter foam 714, the outer mesh substrate 716, and the small diameter foam 718. The mesh substrates 712, 716 force some of the emissions to condense into condensate, and provide some filtering ability, while the foam layers 714, 718 filter out particulate matter and odors. Once through all four layers, emissions can pass through the base 720 and the HEPA filter 708, and then out of the vented outlet cap 710.

[0102] FIG. 10 illustrates perspective views of various electronic smoking devices, each of which includes a different way of accessing a vaporizer portion of an electronic smoking device, according to various embodiments of the present disclosure. As discussed above, it is generally desirable that once emissions are exhaled into the electronic smoking device 100, they are sealed inside and do not leak out without having gone through the filtering mechanisms of the filter cartridge assembly. As such, in certain embodiments, a diverter valve, such as the diverter valve 210 of FIG. 2, may be sealed to a mouthpiece, such as the mouthpiece 102 of FIG. 2, so as to prevent leakage up through the diverter valve and out of the mouthpiece. However, users will generally need to access the vaporizer portion of an electronic smoking device. For example, in the example embodiment shown in FIGS. 2-3, users may have to change and/or refill the material in the cooker chamber 107. In order to ensure that the seal between the diverter valve 210 and the mouthpiece 102 remains secure and leak-proof, users may be given access to the vaporizer portion of an electronic smoking device without disturbing the seal between the diverter valve 210 and the mouthpiece 102. In FIG. 10, four different embodiments are shown by which a user can access a vaporizer portion without removing the mouthpiece 102. In the leftmost embodiment, a removable cap is provided which provides access to the vaporizer portion without removing the mouthpiece 102. Similarly, in the two center embodiments, a side-hinge cap and a top-hinge cap provide access to the vaporizer portion. In the rightmost embodiment, the mouthpiece 102 has been offset. The mouthpiece 102 is no longer centered, and is set towards the filter cartridge assembly portion of the electronic smoking device so as to provide more convenient access to the vaporizer portion.

[0103] It should be noted that, while the various example embodiments presented in the figures and discussed above have utilized an open tank electronic smoking device in which a user can access and refill materials in the cooker chamber, such example embodiments are provided for ease of explanation, and the present disclosure is not limited to such embodiments. The various features and improvements discussed herein such as, for example, the onboard filtering solutions and bi-directional diverter valving systems, can be implemented on any electronic smoking device, non-electronic smoking device, and/or vaping device of any form factor, shape, and/or size. For example, the technologies disclosed herein can be applied to open tank eliquid devices, closed tank eliquid devices, as well as devices designed for use with any material, including liquid, wax, and dry leaf materials such as cannabis.

[0104] FIG. 11A and FIG. 11B illustrate, respectively, a side plan view and a front plan view of another electronic smoking device 1000, according to an embodiment of the present disclosure. The electronic smoking device 1000 includes a mouthpiece 1002 secured to a mid-enclosure 1004. In certain embodiments, the mouthpiece 1002 can be a disposable and/or replaceable component. In various embodiments, different mouthpieces 1002 can be flavored with different flavors such that users can select and install a mouthpiece 1002 based on a flavor of the user's choosing, and can replace the mouthpiece with a new one should the user wish to experience a different flavor. It should be understood that this feature can be applied to any of the various mouthpieces disclosed herein, and, similarly, any features described with respect to any particular component or embodiments described herein can be applied to any other similar components or embodiments described herein.

[0105] The mid-enclosure 1004 houses a cooker chamber that is configured to contain a material to be heated and vaporized, such as liquid, oil, flower, or leaf material. The mid-enclosure 1004 can include a transparent portion 1009 so that a user can view material contained within the cooker chamber. The electronic smoking device 1000 includes an igniter button 1020 that a user can press to heat and vaporize material in the cooker chamber, and a charging port 1028 to charge the electronic smoking device 1000.

[0106] FIG. 12 illustrates a cross-sectional view of the electronic smoking device 1000 taken along a line 12-12 of FIG. 11B, according to an embodiment of the present disclosure. In FIG. 12, it can be seen that a filter portion comprising a filter cartridge assembly 1014 occupies one side of the electronic smoking device 1000, and a vaporizer portion 1100 occupies the other side of the electronic smoking device 1000. In various embodiments, the filter cartridge assembly 1014 can be a disposable and/or replaceable component such that users can periodically replace the filter cartridge assembly 1014 with a new, fresh filter cartridge assembly.

[0107] It can be seen that, in general, the structure of the electronic smoking device 1000 is fairly similar to the electronic smoking device 100 described earlier in this disclosure. However, one notable difference in this embodiment is the placement of an inlet check valve 1112 within the vaporizer portion 1100 and an outlet check valve 1114 within the filter cartridge assembly 1014. In a previous embodiment depicted in FIG. 2B and FIGS. 3A-C, an inlet check valve 212 and an outlet check valve 214 were positioned within a mouthpiece 102. However, in this embodiment, these components have been moved into the vaporizer portion 1100 and the filter cartridge assembly 1014, respectively. The various components of the vaporizer portion 1100 and the filter cartridge assembly 1014 will now be described in greater detail with reference to FIGS. 13, 14, and 15A-D.

[0108] FIG. 13 illustrates an exploded view of the electronic smoking device 1000, without the filter cartridge assembly 1014, and with particular emphasis on the vaporizer portion 1100, according to an embodiment of the present disclosure. FIG. 13 depicts the mouthpiece 1002, which is secured to the mid-enclosure 1004. The mid-enclosure 1004 is at least partially enclosed by an external housing 1008. The mid-enclosure 1004 houses a cooker chamber 1006, which is configured to contain a material to be heated and vaporized. The cooker chamber 1006 also includes a heating element, such as a coil, to heat and vaporize material contained therein. The heating element may draw power from a battery 1010. The cooker chamber 1006 is sealed by a seal 1113. The seal 1113 and a valve housing 1115 are secured together to house an inlet check valve 1112. The inlet check valve 1112 is a one way valve that allows vapors to escape the cooker chamber 1006 into the mouthpiece 1002 when a user inhales on the mouthpiece 1002, but substantially blocks and/or prohibits emissions from entering the cooker chamber 1006 or the vaporizer portion 1100 when the user exhales into the mouthpiece 1002. For example, when a user inhales, the inlet check valve 1112 can lift away from the valve housing 1115, allowing air to flow into the cooker chamber 1006 and out of the mouthpiece 1002. When the user exhales, the inlet check valve 1112 can be pushed against the valve housing 1115, preventing any air from entering the cooker chamber 1006 or the vaporizer portion 1100.

[0109] FIG. 14 illustrates an exploded view of a filter cartridge assembly 1400, according to an embodiment of the present disclosure. In various embodiments, the filter cartridge assembly 1400 may be used as the filter cartridge assembly 1014 of FIG. 12. In various embodiments, the filter cartridge assembly 1400 may be used in conjunction with any of the various electronic smoking device embodiments described herein.

[0110] The filter cartridge assembly 1400 includes an open-ended cylindrical outer body 1414, which is at least partially enclosed at the top by an inlet cap 1402 and at least partially enclosed at the bottom by a vented outlet cap 1422. The inlet cap 1402 can, in various embodiments, be sealed with O-rings, a quarter turn lock, and/or a threaded seal with the outer body 1414, or any other appropriate sealing mechanisms, to form a leak-free seal. Between the inlet cap 1402 and the vented outlet cap 1422, and housed within the main enclosure body 1414, are various filtering mechanisms that assist in removing odors and particulate matter from emissions blown into the filter cartridge assembly 1400. Emissions are received into the filter cartridge assembly 1400 via the inlet cap 1402. Once the emissions pass through various filtering mechanisms housed within the main enclosure body 1414, clean, filtered emissions are emitted via the vented outlet cap 1422.

[0111] In the example embodiment shown in FIG. 14, emissions pass through the inlet cap 1402 into an air separator 1408. The air separator 1408 can be an elongated tube that is divided into sections by partition walls, similar to the air separator inlet 408 described above with reference to FIG. 4. The air separator 1408 divides exhaled emissions into various sections, and provides surface area that encourages condensation of the emissions. Once emissions pass through the air separator 1408, they pass through cylindrical mesh filter 1416. In various embodiments, the mesh filter 1416 may comprise a stainless steel material, plastic, and/or polymer material. The mesh filter 416 is also surrounded by a HEPA filter 1420. The HEPA 1420 filter is secured and sealed to the mesh filter 1416 and/or the air separator 1408 by an adhesive 1421 that surrounds the perimeter of the HEPA filter 1420. Once emissions pass through the HEPA filter 1420, they are pushed down towards another air separator 1419, through an outlet check valve 1114, and out through the vent cap 1422.

[0112] The air separator 1419 and the vent cap 1422 are ribbed to allow air to pass through (see, e.g. FIG. 15D), and the outlet check valve 1114 is secured between the air separator 1419 and the vent cap 1422. The outlet check valve 1114 is a one way valve that acts opposite the inlet check valve 1112 described above. The outlet check valve 1114 allows a user to exhale air into the mouthpiece 1002 and out through the filter cartridge assembly 1400, but substantially blocks and/or prohibits air from passing through the filter cartridge assembly 1400 into the mouthpiece 1002 when a user inhales on the mouthpiece 1002. For example, when a user exhales, the outlet check valve 1114 can lift away from the air separator 1419, allowing air to flow into and through the filter cartridge assembly 1400 and out of the vented outlet cap 1422. When the user inhales, the outlet check valve 1114 can be pushed against the air separator 1419, preventing any air from moving through the filter cartridge assembly 1400.

[0113] FIG. 15A illustrates a plan view of the filter cartridge assembly 1400, according to an embodiment of the present disclosure. FIG. 15B illustrates a cross-sectional view of the filter cartridge assembly 1400 along the line 15B-15B of FIG. 15A. FIG. 15C illustrates a close-up view of the filter cartridge assembly 1400. It can be more clearly seen in FIGS. 15B and 15C that when a user exhales into a mouthpiece of an electronic smoking device (such as the mouthpiece 1002 of the electronic smoking device 1000 of FIG. 12), emissions from the user enter the filter cartridge assembly 1400 through the inlet cap 1402 into the air separator 1408. Emissions are then pushed through the mesh filter 1416 and the HEPA filter 1420. The filtered emissions then pass through the air separator 1419 and the outlet check valve 1114, and out of the filter cartridge assembly 1400 via the vent cap 1422.

[0114] FIG. 15D illustrates a cross-sectional view of the filter cartridge assembly 1400 along the line 15D-15D of FIG. 15A. FIG. 15D shows openings in the air separator 1419 and the vented outlet cap 1422 that allow the two components to secure the outlet check valve 1114 while still allowing air to pass through. When a user inhales on an electronic smoking device, the outlet check valve 1114 seals against the air separator 1419 to prevent air from flowing through the filter cartridge assembly 1400. When a user exhales on an electronic smoking device, the outlet check valve 1114 lifts away from the air separator 1419, allowing air to flow through the filter cartridge assembly 1400.

[0115] FIG. 16A illustrates a perspective view of an electronic smoking device 1600, according to an embodiment of the present disclosure. FIG. 16B illustrates an exploded view of the electronic smoking device 1600. The electronic smoking device 1600 includes a mouthpiece 1602 secured to a body enclosure 1604. In certain embodiments, as discussed above, the mouthpiece 1602 can be a disposable and/or replaceable component. The body enclosure houses a vaporizer cartridge assembly 1620 and a filter cartridge assembly 1630. The vaporizer cartridge assembly 1620 houses a material to be heated and vaporized. In various embodiments, the vaporizer cartridge assembly 1620 can be a removable and disposable component such that when the vaporizer cartridge assembly 1620 is substantially empty (e.g., a user has vaporized all material contained within the vaporizer cartridge assembly 1620), it can be replaced with a new vaporizer cartridge assembly. In various embodiments, the vaporizer cartridge assembly 1620 can also be a sealed assembly such that users are discouraged and/or prevented from refilling the vaporizer cartridge assembly 1620.

[0116] The body enclosure 1604 includes a display 1606. The display 1606 can be, for example, an electronic display. In another example, the display 1606 can be a transparent window through which a user can view material contained in the cartridge assembly 1620. The electronic smoking device 1600 includes an igniter button 1608 that a user can press to heat and vaporize material in the vaporizer cartridge assembly 1620, one or more LED display lights 1610, and a charging port 1612 to charge the electronic smoking device 1600. The one or more LED display lights 1610 may provide an indication of, for example, remaining battery charge left in the electronic smoking device 1600, a wattage level of the electronic smoking device 1600, and/or a remaining cartridge life for the vaporizer cartridge assembly 1620. The body enclosure 1604 also includes a removable storage cover 1614. As will be described in greater detail below, the removable storage cover 1614 can be removed to reveal a storage compartment in which, for example, additional vaporizer cartridge assemblies can be stored.

[0117] FIG. 17A illustrates a front plan view of the electronic smoking device 1600. FIG. 17B illustrates a cross-sectional view of the electronic smoking device 1600 taken along a line 17B-17B of FIG. 17A, according to an embodiment of the present disclosure. In FIG. 17B, it can be seen that the vaporizer cartridge assembly 1620 is connected to a PCB/battery 1622. The electronic smoking device 1600 comprises a vaporizer portion 1602, which comprises the vaporizer cartridge assembly 1620 and the PCB/battery 1622. The electronic smoking device 1600 also comprises a filter portion 1603 which comprises the filter cartridge assembly 1630. In various embodiments, both the vaporizer cartridge assembly 1620 and the filter cartridge assembly 1630 can be a disposable and/or replaceable components such that users can periodically replace the vaporizer cartridge assembly 1620 with a new vaporizer cartridge assembly, and can periodically replace the filter cartridge assembly 1630 with a new filter cartridge assembly.

[0118] Similar to the embodiments shown in FIGS. 12-15, the vaporizer cartridge assembly 1620 includes an inlet check valve 1650 and the filter cartridge assembly 1650 includes an outlet check valve 1660. Similar to other inlet check valves described herein, the inlet check valve 1620 is a one way valve that allows vapors to escape the vaporizer cartridge assembly 1620 into the mouthpiece 1602 when a user inhales on the mouthpiece 1602, but substantially blocks and/or prohibits emissions from entering the vaporizer cartridge assembly 1620 when the user exhales into the mouthpiece 1602. The outlet check valve 1660 allows a user to exhale air into the mouthpiece 1602 and out through the filter cartridge assembly 1630, but substantially blocks and/or prohibits air from passing through the filter cartridge assembly 1630 into the mouthpiece 1602 when a user inhales on the mouthpiece 1602.

[0119] FIG. 18A illustrates an exploded view of a filter cartridge assembly 1800, according to an embodiment of the present disclosure. FIG. 18B illustrates a plan view of the filter cartridge assembly 1800 in an assembled state, according to an embodiment of the present disclosure. FIG. 18C illustrates a cross-sectional view of the filter cartridge assembly 1800 in the assembled state along the line 18C-18C of FIG. 18B. In various embodiments, the filter cartridge assembly 1800 may be used as the filter cartridge assembly 1630 of FIG. 16B. In various embodiments, the filter cartridge assembly 1800 may be used in conjunction with any of the various electronic smoking device embodiments described herein. In various embodiments, any of the various filter cartridge assembly embodiments disclosed herein may be used in conjunction with any of the various electronic smoking device embodiments described herein.

[0120] The filter cartridge assembly 1800 includes an open-ended outer body 1810, which is enclosed at the top by an inlet cap 1804 and enclosed at the bottom by a vented outlet cap 1814. The inlet cap 1804 can, in various embodiments, be sealed with O-rings (such as the O-ring 1802), a quarter turn lock, a threaded seal, or simply a tight material fit within the outer body 1810, or any other appropriate sealing mechanisms, to form a leak-free seal. Between the inlet cap 1804 and the vented outlet cap 1814, and housed within the main enclosure body 1810, are various filtering mechanisms that assist in removing odors and particulate matter from emissions blown into the filter cartridge assembly 1800. Emissions are received into the filter cartridge assembly 1800 via the inlet cap 1804. Once the emissions pass through various filtering mechanisms housed within the main enclosure body 1810, clean, filtered emissions are emitted via the vented outlet cap 1814.

[0121] In the example embodiment shown in FIG. 18, emissions pass through the inlet cap 1804 into a mesh support structure 1807. The mesh support structure 1807 supports a cylindrical mesh filter 1806. In various embodiments, the mesh filter 1806 may comprise a stainless steel material, plastic, and/or polymer material. The mesh filter 1806 is also surrounded by a HEPA filter 1808. The HEPA 1808 filter is secured and sealed to the mesh filter 1806, the mesh support structure 1807, the inlet cap 1804, and/or the vented outlet cap 1814 by an adhesive 1809 that surrounds the perimeter of the HEPA filter 1808. A top end of the mesh support structure 1807, proximate the inlet cap 1804, is open to allow emissions to flow in from the inlet cap 1804. An opposite bottom end of the mesh support structure 1807 can be closed such that emissions which enter the inlet cap 1804 must pass through the mesh filter 1806 and the HEPA filter 1808. Once emissions have passed through both the mesh filter 1806 and the HEPA filter 1808, the emissions can moved past an open outlet check valve 1812 and out of the filter cartridge assembly 1800 through the vented outlet cap 1814.

[0122] FIG. 19A illustrates an exploded view of a filter cartridge assembly 1900 which is a slightly modified embodiment of the filter cartridge assembly 1800. In FIG. 19A, the HEPA filter 1808 from FIG. 18A has been replaced by a corrugated filter 1908. The corrugated filter 1908 may also be a HEPA filter, but corrugated. The corrugated shape of the corrugated filter 1908 provided additional surface area for additional filtering, while also providing more channels to provide improved airflow through the filter cartridge assembly 1800. FIG. 19B provides a plan view of the support structure 1807 and corrugated filter 1908. FIG. 19C provides a cross-sectional view of the support structure 1807 and corrugated filter 1908 taken along the line 19C-19C of FIG. 19B.

[0123] FIG. 20A illustrates a perspective view of the electronic smoking device 1600 of FIG. 16A. FIG. 20B illustrates a perspective view of the electronic smoking device 1600 in which the removable storage cover 1614 has been removed to reveal two compartments 1621 for storing additional vaporizer cartridge assemblies 1620a, 1620b.

[0124] While various embodiments of the disclosed technology have been described above, it should be understood that they have been presented by way of example only, and not of limitation. Persons skilled in the art will appreciate that various modifications can be made without departing from the invention. Likewise, the various figures may depict an example configuration for the disclosed technology, which is done to aid in understanding the features and functionality that can be included in the disclosed technology. For example, while the example electronic smoking device 100 is depicted and described in conjunction with a vaporizer portion 200 and a filter cartridge assembly 114; the electronic smoking device 1000 is depicted and described in conjunction with a vaporizer portion 1100 and a filter cartridge assembly 1014; and the electronic smoking device 1600 is depicted and described in conjunction with a vaporizer portion 1601 and a filter portion 1603, it should be understood that the various vaporizer portions and/or filtering portions and their respective components can be used interchangeably and in various combinations and used in different electronic smoking device embodiments. Similarly, while various example materials and example sizes have been disclosed, such materials and sizes are disclosed only as possible embodiments to aid in understanding and describing various features and functionality of the disclosed technology. The disclosed technology is not restricted to the illustrated example configurations, but the desired features can be implemented using a variety of alternative configurations. It is therefore intended that the scope of the invention be limited not by this detailed description, but rather by any claims that issue on an application based hereon. Accordingly, the disclosure of the embodiments of the invention is intended to be illustrative, but not limiting, of the scope of the invention. Accordingly, the invention is defined only by the following claims.