US 5,312,018 AGrant
Containing and Dispensing Device for Flowable Material Having Relatively Rigid and Deformable Material Containment Portions
Issue Date:1994-05-17
•17 Claims
•5 Drawing Sheets
Abstract
A device is disclosed for containing and dispensing flowable materials contained in a material handling unit which is located at least in part within an outer container. The material handling unit includes a first, relatively rigid portion having a nozzle affixed to one end thereof and a readily reshapable bladder affixed to the other end thereof, with the nozzle having a one-way check valve permitting ejection of the contents therefrom. The outer container admits air into the space between the containers to thereby cause selective expellation of the contents of the material handling unit without direct manual contact by a user with the device.
Metadata
Inventor
- Paul D. Evezich
Application Information
Application Number:US 9315683
Filing Date:1992-08-18
Priority Date:1988-07-29
Art Unit:314
Classifications
IPC:
B65D 3700
Field of Search:
22294;95;105;181;183;185;209;386.5;401;568;389;179
Patent Drawings (5 sheets)
Description
Field of the Invention
This invention relates to dispensing devices and, more particularly, relates to dispensing devices for containing and dispensing flowable materials.
Background of the Invention
Squeezable dispensing devices for dispensing flowable materials are well known and such devices have heretofore been developed and/or utilized wherein bladder containment and/or pressure dispensing are shown. Such arrangements, for example, are described in U.S. Pat. Nos. 3,223,289, 3,225,967, 3,270,920, 3,342,377 and 4,147,278 showing various arrangements wherein the contents of a bladder are urged therefrom by a gas introduced into a contained volume adjacent to the bladder.
Other arrangements making use of a bladder containing materials to be dispensed by pressure are shown in U.S. Pat. Nos. 4,469,250 issued Sep. 4, 1984 and 4,760,937, issued Aug. 2, 1988 to Evezich (the Applicant herein). In this arrangement a separate bladder is housed within an outer shell, the former showing a device having a removable cap and nozzle construction and utilizing a projection positioned at the base of the nozzle for piercing the bladder to allow dispensing of its contents, the various elements not being permanently affixed to one another.
Dispensing devices have also heretofore been known and/or utilized wherein an inflatable bladder is utilized to push contents out of a container (see for example U.S. Pat. Nos. 3,294,289, 4,213,545 and 3,592,365), as have devices utilizing volume reducing structures for selectively changing the volume of the dispensing device (see for example U.S. Pat. Nos. 2,715,981, 3,474,936, and 4,098,434).
While dispensing devices making use of bladders and/or pressure dispensing have heretofore been suggested and/or utilized, further improvements could nevertheless still be utilized.
Summary of the Invention
This invention provides an improved dispensing device for containing and dispensing flowable materials. Dispensing of materials is achieved through use of a material handling unit containing the material to be dispensed at least partially housed within an outer container, the material handling unit including a relatively rigid portion communicating with the exterior of the device through a nozzle affixed to one end thereof and having a readily reshapable portion affixed to the other end thereof, both portions being configured for containment of a selected volume of material.
A one-way check valve is positioned at an outlet opening in the nozzle to permit flow of the contents of the unit therethrough but precluding passage of matter thereinto. A second one-way check valve is positioned to permit the flow of air from the exterior of the device to the volume defined between the inner container and the material handling unit. The outer container may be squeezable and may be adapted for use with pressure exerting structure such as a pump or bellows for selectively increasing pressure exerted on the readily reshapable portion of the material handling unit to thereby expel the contents therefrom without direct manual contact by a user of the device.
It is therefore an object of this invention to provide an improved containing and dispensing device for containing and dispensing flowable materials.
It is another object of this invention to provide an improved containing and dispensing device for dispensing flowable materials which has a material handling unit including a readily reshapable portion and in which the contents thereof are substantially protected from contaminants.
It is still another object of this invention to provide an improved containing and dispensing device for dispensing flowable materials including a material handling unit and an outer container, with the outer container having an inlet port allowing passage of matter therethrough into the volume between the outer container and a portion of the material handling unit.
It is yet another object of this invention to provide an improved containing and dispensing device for dispensing flowable materials having a disposable material handling unit and a reusable outer container.
It is still another object of this invention to provide an improved dispensing device for dispensing flowable materials having an outer container for containing a material handling unit including a first, relatively rigid, containment portion and a second, readily reshapable, containment portion, with materials being dispensed by both deformation of the second containment portion and by movement thereof into the first containment portion to thus expel the contents of the relatively rigid portion.
With these and other objects in view, which will become apparent to one skilled in the art as the description proceeds, this invention resides in the novel construction, combination, and arrangement of parts substantially as hereinafter described, and more particularly defined by the appended claims, it being understood that changes in the precise embodiment of the herein disclosed invention are meant to be included as come within the scope of the claims.
Brief Description of the Drawings
The accompanying drawings illustrate a complete embodiment of the invention according to the best mode so far devised for the practical application of the principles thereof, and in which:
FIG. 1 is a perspective view of a first embodiment of a dispensing device;
FIG. 2 is a partially exploded perspective view of the dispensing device of FIG. 1;
FIG. 3 is a sectional view of the device of FIG. 1 taken along section line 3--3;
FIG. 4 is a partial sectional view of the device of FIG. 3 particularly illustrating the relationship of the two component external container;
FIG. 5 is a perspective view of the device of FIG. 1 showing material being dispensed;
FIG. 6 is a partial, exploded view of a second embodiment of a dispensing device;
FIG. 7 is a partial sectional view of the embodiment of the device shown in FIG. 6;
FIG. 8 is a partial sectional view of a third embodiment of a dispensing device and particularly illustrating one alternative nozzle and valving;
FIG. 9 is a partial perspective view of a fourth embodiment of a dispensing device;
FIG. 10 is a partial sectional view of the embodiment of the device of FIG. 9 taken along section line 10--10;
FIG. 11 is a sectional view of one available auxiliary attachment usable with the dispensing device of this invention;
FIG. 12 is a sectional view of a second auxiliary attachment usable with the dispensing device of this invention;
FIG. 13 is a perspective view of the dispensing device of this invention;
FIG. 14 is a cross sectional view of the device shown in FIG. 13;
FIG. 15 is a sectional view of an alternate arrangement of the dispensing device shown in FIG. 14;
FIG. 16 is an enlarged partial sectional view of the device shown in FIG. 15 particularly illustrating part of the structure of the inner containment portion of the device;
FIG. 17 is a perspective view of a second and, for purposes of this application, now preferred embodiment of the device of this invention;
FIG. 18 is a sectional view of the device shown in FIG. 17 taken along section line 18--18 illustrating the material handling unit in a substantially filled condition;
FIG. 19 is a sectional view of the device shown in FIG. 18 illustrating use of the readily deformable bladder of the material handling unit to aid expellation of the contents of the more rigid portion after material contained in the bladder has been expelled therefrom due to bladder deformation; and
FIG. 20 is an enlarged partial section view of the engaging and sealing structure of the device.
Description of the Invention
FIGS. 1 through 12 show devices shown, described and claimed in U.S. Pat. Nos. 4,469,250 and 4,760,937 issued to the applicant herein and are described herein as background and to illustrate certain basic structural elements of this invention.
Referring now to the drawings, a storage and dispensing device 15 for storing and dispensing materials is shown in FIG. 1. As shown, dispensing device 15 includes body 17 and dispensing conduit, or nozzle, 19 having an outlet terminus 21.
As best shown in FIG. 2, dispensing device 15 includes three components, a resilient outer container 23, a deformable, or readily reshapable, inner container 25, and a retainer ring 27 engagable with resilient outer container 23. Retainer ring 27 includes a threaded base 29 and a retainer lip 31. Deformable inner container 25 has thereon, at the joinder between deformable inner container 25 and nozzle 19, an annular ridge 33. Resilient outer container 23, in turn, includes inner container housing 35 having external threads 37 at the upper portion or body section thereof, external threads 37 being engagable with internal threads 39 of the retainer ring, thereby maintaining deformable inner container 25 within resilient outer container 23 by clamping of annular ridge 33 between retainer lip 31 and housing 35, and maintaining nozzle 19 through retainer ring 27.
As best shown in FIG. 3, dispensing device 15 includes curved nozzle base 41, which base is curved toward the inner portions of nozzle 19, and which, together with deformable inner container 25 provides a storage area for the materials to be dispensed. Deformable inner container 25 is permanently affixed, or joined, to nozzle 19, and, more particularly, is permanently connected with curved nozzle base 41 at joinder 43 which defines the outer circumference of curved nozzle base 41. Inlet terminus 45 defines an inner circumference of curved nozzle base 41, inlet terminus 45 opening to dispensing channel 47 and outlet terminus 21 through nozzle 19.
Nozzle 19 includes two sections, nozzle tip 49, and nozzle body 51. At inlet terminus 45, one-way valve 53 (which may be any of a variety of one-way valves known commercially) is disposed allowing passage of materials from deformable inner container 25 to dispensing channel 47, while substantially precluding movement of matter from dispensing channel 47 back into inner container 25.
At the bottom portions of inner container housing 35, a second one-way valve 55 (which may also be any of a variety of one-way valves known commercially) is located, which valve allows passage of air from the exterior of the dispensing device to volume 57 defined between inner container housing 35 and inner container 25. Valve 55 substantially precludes passage of air from volume 57 to the exterior of the dispensing device.
Turning now to FIG. 4, details of the two part outer container and one-way valving are shown. Valve 53 is shown, for example, to be a curved valve positioned at inlet terminus 45. While curved in its cross-section, valve 53 is more accurately viewed as a dome-shaped valve having its convex portion facing into dispensing channel 47 and its concave portion being presented to the interior of deformable inner container 25. Valve 53 is constructed, for example, of a resilient material having negligible resilience to stresses imposed against its convex surface but being resilient with regard to stresses imposed on its concave surface. Passageway 59 in valve 53 opens in response to stresses to the convex surface to allow passage of materials from inner container 25 to dispensing channel 47 and thereafter through outlet terminus 21, such stress being created by application of pressure to inner container 25, for example, by the squeezing of outer container 23.
As also shown in FIG. 4, retainer ring 27 is engagable at internal threads 39 by external threads 37 of resilient outer container 23. Retainer lip 31 brings annular clamping projection 61 to bear upon annular ridge 33 thereby clamping the annular ridge between clamping projection 61 and the upper surface of external threads 37 and sealing volume 57 at its upper extremity.
It may be seen, therefore, that when resilient outer container 23 is depressed, as shown in FIG. 5, material 63 is forced through outlet terminus 21 as air within volume 57 creates pressure on inner container 25. When inner container 25 is thus compressed, materials are forced through one-way valve 53 and into dispensing channel 47 and ultimately through outlet terminus 21. Upon release of resilient outer container 23, the outer container begins to return to its original shape thereby relieving the pressure on inner container 25 and allowing passageway 59 in valve 53 to close. However, deformable inner container 25 stays in its deformed shape as no air or other matter is allowed to pass back through valve 53 and occupy any volume thereof. As resilient outer container 23 regains its shape it draws air through one-way valve 55 from the exterior of the device through opening 65 into volume 57. When outer container 23 has fully regained its shape, the pressure between volume 57 and the exterior of the device will equalize thus allowing opening 65 in valve 55 to close, thereby disallowing passage of air back from volume 57 to the exterior of the device. When all of this has occurred, the process may be repeated, the volume of air within resilient outer container 23 thus being sufficiently replenished to continually apply pressure to inner container 25 until the inner container is substantially completely deformed and emptied of its contents.
Curved nozzle base 41 is configured so that a cone in deformable inner container 25 is not formed as would be the case if the nozzle base were flat, thereby allowing deformable inner container 25 to enter into the volume of the convex curvature of curved nozzle base 41 for a more complete evacuation of the contents within inner container 25.
Turning now to FIGS. 6 and 7, a second embodiment of a dispensing device is shown. Dispensing device 70 includes a resilient outer container 72 and a deformable inner container 74 which is preferably permanently joined with nozzle 76. Nozzle 76 may be identical in structure to that of nozzle 19 above-described, and includes outlet terminus 78 and base 80, base 80 having external threads 82 positioned below a sealing ridge 84. Outer container 72 includes inner container housing 86 having internal threads 88 at the upper portion thereof, internal threads 88 and external threads 82 of nozzle 76 being engagable.
Dispensing device 70 has many of the features of the dispensing device shown in FIG. 3. Curved nozzle base 90 is shown in FIG. 7 which, together with inner container 74 preferably permanently joined at joinder 92, forms the storage area for the materials. Base 90 has inlet terminus 94 at its inner circumference leading to dispensing channel 96 through one-way valve 98. At the bottom portion of resilient outer container 72, one-way valve 100 is disposed for the passage of air from the exterior of the device to volume 102 defined between outer container 72 and inner container 74. The dispensing device operates in the same manner as the previous embodiment, with the exception that nozzle 76 and inner container 74 form a unitary structure thereby providing a two-part construction for the dispensing device engagable at external threads 82 of nozzle base 80 and internal threads 88 at the upper portion of resilient outer container 72, the two portions when tightly engaged bringing annular sealing ridge 84 into a substantially sealing relationship with the upper portion of the internal threads 88 of outer container 72 thereby sealing volume 102 thereat.
In FIG. 8 a third embodiment of a dispensing device is shown, in many ways similar to the device shown in FIG. 7, but showing alternative one-way valving and selective dispensing channel closure. Turning first to the alternative one-way valving, one-way valve 105 is shown to include spring 107 and stopper 109, spring 107, at one end thereof, biasing stopper 109 toward inlet terminus 111 to dispensing channel 113, and spring 107 at its other end resting against support surface 115. When materials are being urged through inlet terminus 111, stopper 109 is forced away from inlet terminus 111 to dispensing channel 113 thereby allowing passage of materials, but when material flow ceases, spring 107 urges stopper 109 back into a sealing relationship with inlet terminus 111 thereby preventing the movement of air and matter from dispensing channel 113 through inlet terminus 111.
A second alternative one-way valve 117, is shown at the lower portion of the alternative embodiment shown in FIG. 8. Valve 117 is positioned in resilient outer container 119, at air inlet 121, through mounting hole 123 being held in place by retainer 125 at the exterior of the dispensing device. Retainer 125 is connected to valve flaps 129 by connector 127. As resilient outer container 119 begins to regain its shape after deformation, and air is drawn through air inlet 121 from the exterior of the device, valve flaps 129 are forced open thereby allowing the passage of air into the device until the pressure is equalized, whereupon the valve flaps 129 are closed.
Also shown in FIG. 8, threaded nozzle tip 131 is provided for receipt of threaded cap 133, threaded nozzle tip 131 and threaded cap 133 together providing outlet terminus 135. Outlet terminus 135 is normally closed where no stresses are imposed on inner walls 136 of threaded cap 133. However, when threaded cap 133 is tightened against threaded nozzle tip 131, normally closed outlet terminus 135 is forced into its open position thereby allowing materials to escape from the dispensing device.
Turning to FIG. 9, a fourth embodiment of a dispensing device 140 is shown, the device having a one-piece resilient body 142 having a nozzle 144 closed by removable sealing cap 146. Resilient body 142 includes one-way valve 148 at the upper portion thereof for selectively allowing passage of air from the exterior of dispensing device 140 to interior portions thereof.
As shown in FIG. 10, it may be appreciated that this one-piece construction of the dispensing device is similar in many regards to the prior embodiments shown herein. Body 142 is shown to include resilient outer container 150, as well as nozzle 144 and deformable inner container 152 having one-way valve 154 (similar to the valving shown in FIG. 8 for example) at the inlet terminus of dispensing channel 156. Dispensing channel inner walls 157 are joined with curved nozzle base 158 which in turn is joined with deformable inner container 152. Removable sealing cap 146 covers outlet terminus 159 of nozzle 144, being engagable at threaded nozzle tip 160. In this embodiment, volume 162 defined between resilient outer container 150 and deformable inner container 152 is shown to extend into portions of nozzle 144 through annular opening 164, thereby allowing placement of one-way valve 148 at the upper portion of the dispensing device, for passage of air from the exterior of the device into volume 162.
In FIG. 11 one of many auxiliary attachments usable with the dispensing device is shown. Nozzle extender 167 includes nozzle engaging base 169 having internal threads 171 therein for attachment of the nozzle extender to, for example, threaded nozzle tip 131 (shown in FIG. 8) or threaded nozzle tip 160 (shown in FIG. 10). Dispensing channel extension 173 resides through nozzle extender 167 and has multiple outlet termini 175.
In FIG. 12 a second nozzle extender 177 is shown. Herein a resilient nozzle 179 is shown with internal threads 181 at base 183 thereof and having dispenser channel extension 185 therethrough.
FIGS. 13 through 20 illustrate the containing and dispensing device of this invention. Dispensing device 195, as shown in FIG. 13, may be used in association with a dispensing apparatus 197 including a rack structure 199 for holding device 195 for activation thereof to cause dispensing of matter therefrom, as more fully set forth hereinbelow, by movable arm 201.
Dispensing apparatus 197 may be made mountable on bracket portion 203. Arm 201, which may be manually manipulable or be made mechanically responsive to a servomechanism or the like, is mounted on hinges 205 to framework member 207, and includes framework member 209 in contact with bottom portion 211 of device 195. The device is maintained in framework 199 through bracket mount 213 at the mid-portions of the device, and bracket mount 215 through which nozzle 217 is maintained. As will be more fully set forth hereinbelow, by depressing arm 201, contents of device 195 are expelled through outlet opening 219.
The embodiment of the device shown in FIGS. 13 and 14 is similar in many regards to the device shown in FIGS. 6 and 7 including, for example, utilization of one-way flow control valve 100, sealing ridge 84, and internal and external connecting threads 88 and 82, respectively.
As illustrated in FIG. 14, one-way flow control valve 223, for example a flapper valve, is integrally formed in the tip of nozzle 217 at outlet opening 219. Outer container 225 at least in part forms a chamber 226 at the interior thereof and includes a compressible pressure reducing structure 227, for example a bellows type structure, connected between bottom portion 211 and side wall 229 of outer container 225.
Material handling portion 231 of device 195, including nozzle 217, has a tubular portion 233 connected at base structure 235 of nozzle 217, within which a substantial amount of the contents of handling portion 231 are maintained.
Tubular portion 233 has open ends 237 and 239, with open end 239 having readily reshapable bladder 241 affixed to portion 233 adjacent thereto. Portion 233 is a relatively rigid structure relative to bladder 241 and bladder 241 has a volume and shape when fully inflated which preferably substantially corresponds to the volume and shape of relatively rigid portion 233 and nozzle 217.
Upon application of pressure to bottom portion 211 of outer container 225, volume reducing structure 227 is compressed by the movement of the bellows like wall segments 245 of the structure toward one another thereby effectively reducing volume 247 of outer container 225. Since valve 100 will be maintained in a closed position during pressurization of outer container 225, readily reshapable bladder 241 is partially inflated thus being forced a distance into relatively rigid member 233 and displacing an equal volume of the contents within member 233 and expelling contents through valve 223 and outlet opening 219.
When pressure on bottom portion 211 ceases, volume reducing structure 227 resiliently regains its original shape, thus creating a partial vacuum in volume 247 of outer container 225 and opening one-way valve 100 allowing fluid flow therethrough and thus maintaining the partial inflation of bladder 241 so that bladder 241 maintains its new position in relatively rigid tubular portion 243.
As may be appreciated, the portions of the device may be separately formed and assembled as heretofore set forth, or, may be formed as unitary structures, for example by blow molding or the like bladder 241, relatively rigid tubular member 233 and nozzle 217 in a single operation.
Turning now to FIGS. 15 and 16, an alternative arrangement of the containing and dispensing device shown in FIGS. 13 and 14 is shown which is similar in many regards to the device shown therein. Dispensing device 250 includes nozzle 144, one-way valve 148, one-way ball valve 154, dispensing channel 156, outlet opening 159, and annular opening 164 allowing communication between upper and lower portions of volume 162, all as also shown with respect to the embodiment of the device shown in FIG. 10.
However, the embodiment of the device shown in FIG. 15 includes an outer container 252 having a volume reducing structure 254 positioned at the upper portions thereof which operates in a fashion similar to that described with regard to volume reducing structure 227 heretofore described with the exception that pressure is applied by a user of the device to the upper portion of the container (as indicated by the arrow in FIG. 15).
In addition, dispensing device 250 includes nozzle base 256 connected to a wall of dispensing channel 156 at inlet terminus 260 to channel 156. Relatively rigid tubular portion 233 is attached at open end 237 thereof to nozzle base 256, for example at annular mounting ridge 264 (although it is to be realized that a unitary blow molded structure could also be provided).
As set forth in the description of FIG. 14, readily reshapable bladder 241 is affixed to open end 239 of relatively rigid tubular portion 233 for inflation thereof responsive to reduction of volume 162 by movement of volume reducing structure 254 as heretofore described.
As shown in FIG. 16, when the contents to be expelled from the device fully occupy available volume 266 of handling portion 231, bladder 241 is gathered at open end section 239 of relatively rigid tubular portion 233.
FIGS. 17 through 20 illustrate a second embodiment of the device of this invention. Device 270 may be mountable in wall mountable cabinet 272 utilizing mounting lips 274 on cabinet shelf 276 which engage mounting collar 278 formed in one portion of the device. Neck 280, having inlet opening 282 therethrough, has cap 284 positioned thereon for receipt through inlet terminus 286 thereof of fluid, for example air, to provide pressure at the internal portion of the device through conduit 288. Conduit 288 may be attached to any variety of pump or bellows, for example the foot operated bellows pump 290 including bellows structure 292 and one-way valve 294 (the valve allowing passage of air into the bellows and thus, as heretofore described, into the device but substantially precluding passage of air from the bellows and so the device).
Provision of the air pump serves substantially the same purpose as the bellows structure shown in FIGS. 14 and 15. Neck 280 is connected with, or formed as a part of, outer container 296. The materials to be dispensed are contained within material handling unit 298 including a relatively rigid portion 300 and a readily deformable bladder portion 302, both of which have a volume configured for containment of a selected quantity of materials to be dispensed.
Nozzle 304 is formed at, or connected to, one end of relatively rigid portion 300, and outlet opening 306 is described therethrough. One-way valve 308 is provided at the end of the nozzle to allow dispensing of matter therethrough while precluding passage of matter into the nozzle.
As shown in FIGS. 18 and 19, initially materials substantially fill both the relatively rigid and readily deformable portions of the material handling unit. As fluid is received into outer container 296 through inlet 282, readily deformable bladder 302 is deformed until the contents therein are substantially expelled, the readily deformable bladder being utilized thereafter to positively expel the contents of relatively rigid portion 300 as the fluid content within outer container 296 is increased. In this manner both the contents of the bladder and of the relatively rigid portion may be expelled utilizing the readily deformable nature of the material forming bladder 302.
As shown in FIG. 20, outer container 296 includes an inwardly facing engagable surface 310 (for example a female threaded surface). While shown as a two-part structure, it should be realized that outer container 296, nozzle 304, valve 308, neck 280 and threaded portion 310 may be of a unitary molded structure. Outwardly facing engagable surface 312 of relatively rigid portion 300 (for example a male threaded surface) are provided so that the outer container and the material handling unit may be engaged.
Annular face 314 of outer container 296 at one end of the engagable surface thereof, and annular lip 316 of relatively rigid portion 300 are provided to insure a reliable seal between the outer container and the relatively rigid portion of the material handling unit thereat, thus sealing volume 318 defined between the outer container and the material handling unit.
Unitary construction of the nozzle, neck, rigid and deformable portions of unit 298 is accomplished utilizing now known techniques (for example utilizing the Bottle Pack machine, a trademark product of the Rommelag Company of West Germany, such machinery being usable not only to form the material handling unit, but to substantially contemporaneously place contents within the unit, thereby providing an inexpensive, disposable material handling unit).
A variety of materials may be used in constructing the dispensing device of this invention. The construction of the device may include one, two, three or more components thereby allowing for selective disposability and/or reuse of all or portions of the dispensing device.
Use of an inner dispensing and containment portion having a relatively rigid tubular structure, nozzle, and readily reshapable bladder allows for greater safety and integrity of the contents of the inner portion against leakage and the like during shipment and/or use of the device, and is particularly useful where the outer container is reusable and the inner dispensing and containment portion is disposable and would thus be typically supplied separately from the outer containment portion.
Additionally, a more complete evacuation of the contents of the inner containment portions may be achieved through use of the curved nozzle base. Nozzle extenders of many and varied uses may be constructed for attachment to the dispensing device and the nozzle may be constructed to receive caps for sealing the dispensing channel, thus further preventing contaminants from reaching either the dispensing channel or material to be dispensed from the dispensing device.
In summary, an improved dispensing device for containing and dispensing predetermined, usually non-compressible, materials is shown herein including a material handling unit having a readily reshapable containment portion, a relatively rigid containment portion and a nozzle and which is at least partially housed in an outer container, the device making use of one-way valving positioned to permit ejection of the contents of the inner container through the nozzle but precluding passage of contaminants into the unit.
Claims
What is claimed is:
1. A device for containing and repeatedly dispensing a predetermined material comprising: a deformable material containment portion having an open end and a volume for material containment; a second material containment portion which is relatively rigid relative to said deformable material containment portion, said second material containment portion having an engagable portion at one end thereof and a material outlet at another end thereof, a material containment volume being defined between said ends, said open end of said deformable material containment portion being connected to said one end of said second material containment portion adjacent to said connecting means thus together defining an initial containment volume for material to be dispensed; and pressurizing means including wall means for defining a chamber for receiving and housing said deformable material containment portion and having connecting means for engaging said engagable portion of said second material containment portion so that when engaged said pressurizing means and said second material containment portion comprise an outer body of said device, said chamber having a fluid inlet for enabling selected flow of fluid from the exterior of said device to said chamber of said pressurizing means between said wall means and said deformable material containment portion so that negative pressure in said chamber is substantially avoided and dispensing of the material from said device is caused by deformation of said deformable material containment portion and movement of said deformable material containment portion into said second material containment portion.
2. The device of claim 1 wherein said material outlet of said second material containment portion has flow control means for allowing dispensing of the material therethrough while substantially precluding passage of matter from the exterior of said device therethrough.
3. The device of claim 1 wherein said connecting means of said pressurizing means includes an annular face and wherein said engagable portion of said second material containment portion includes an annular lip, said annular lip being adapted to snugly abut said annular face to provide substantial sealing of said chamber thereat when said second material containment portion and said pressurizing means are engaged.
4. The device of claim 1 wherein said pressurizing means includes pumping means connectable with said fluid inlet and operable by a user of the device without direct manual contact therewith for selectively pumping fluid through said inlet.
5. The device of claim 4 wherein at least one of said pumping means and said inlet includes flow control means to permit flow of fluid to said volume but substantially precluding flow of fluid therefrom to the exterior of said device.
6. A device for containing and repeatedly dispensing a predetermined material comprising: material handling means for containing and enabling dispensing of said predetermined material, said material handling means including first and second portions connected to each other adjacent to open and sections thereof, said open end sections each having a substantially similar configuration, with said first portion having a volume for containment of a volume of the material and having a wall defining said volume that is relatively rigid relative to a material containment volume defining wall of said second portion, said wall of said second portion being readily reshapable and movable into said volume of said first portion as a predetermined volume of said material is dispensed, said first portion having an outlet opening therein with first flow control means positioned adjacent thereto oriented to allow dispensing of said predetermined material therethrough but substantially precluding passage of matter into said material handling means through said outlet opening; containment means forming at least in part a chamber which receives said second portion of said material handling means, said first portion being releasably engagable with said containment means adjacent to said open and section thereof; and input means connected for selective flow of matter from the exterior of said containment means to a volume in said chamber defined between said containment means and said second portion of said material handling means so that negative pressure is substantially avoided in said volume and said second portion is deformed to effect dispensing of said material.
7. The device of claim 6 wherein said input means includes a pump which is user actuated and second flow control means for allowing flow of matter to said volume defined between said containment means and said material handling means while substantially precluding passage of matter therefrom to the exterior of said device.
8. The device of claim 6 wherein said first portion includes a nozzle having said outlet opening therein.
9. The device of claim 6 wherein said material handling means includes a nozzle connected with said first portion and having said outlet opening of said first portion defined therethrough, and wherein said nozzle, said first portion and said second portion form a unitary molded structure.
10. The device of claim 6 wherein said containment means includes a body portion, and wherein said first portion of said material handling means and said body portion have opposed engagable surfaces comprising an outwardly facing engaging surface on said first portion and an inwardly facing engaging surface on said body portion of said containment means.
11. The device of claim 10 wherein said first portion includes a nozzle having said outlet opening therein, wherein said outwardly facing engagable surface includes an annular lip defined around said first portion of said material handling means, and wherein said inwardly facing engaging surface includes an annular face at one end thereof defined around said containment means, said annular lip and said annular face being sealably engagable when said first portion of said material handling means and said containment means are engaged.
12. A unit for containing flowable material, said unit being receivable by containment means for containing a part of said unit and including engaging means adjacent to one end thereof for engaging said unit and inlet means for allowing passage therethrough of matter from the exterior thereof to a volume defined within the containment means to substantially avoid negative pressure in said volume and allow repeated dispensing of the flowable material from said unit, said unit comprising: a first portion at least in part defined by a wall and having outlet means at one end thereof for allowing passage therethrough of the material and engagable means at an opposite end thereof for engagement by the engaging means of the containment means, said first portion having a volume defined thereby for material containment; and a second portion having a volume at least in part defined by a wall for initial material containment, said second portion being connected to said first portion adjacent to said opposite end thereof and being readily deformable and movable into said volume of said first portion as a predetermined volume of said material is dispensed, said wall of said first portion being formed so that it is relatively rigid relative to said wall of said second portion.
13. The unit of claim 12 further comprising the inlet means of the containment means including pump and valve means for moving matter from the exterior of the unit to the volume defined within the containment means between the containment means and said second portion while substantially precluding passage of matter from the volume within the containment means to the exterior of the unit.
14. The unit of claim 12 further comprising the containment means having a collar configured for releasably mounting said unit with a mounting structure.
15. The unit of claim 14 further comprising a cabinet having said mounting structure therein.
16. The unit of claim 12 wherein the engaging means includes an annular face defined around the one end of the containment means, and wherein said engagable means includes an annular lip described around said opposite end of said first portion, said annular lip and the annular face being sealably engagable when said first portion and the containment means are engaged.
17. The unit of claim 16 wherein said first portion includes a nozzle adjacent to said one end thereof having said outlet means positioned therethrough.