Compact fluid couplings

[0001] This application is a continuation application of U.S. application Ser. No. 19/458,228 filed on Jan. 23, 2026, which is a continuation application of U.S. application Ser. No. 18/652,113 filed on May 1, 2024, which is a continuation application of U.S. application Ser. No. 17/849,855 filed on Jun. 27, 2022, which claims the benefit of U.S. Provisional Application Ser. No. 63/219,942 filed on Jul. 9, 2021. The disclosures of the prior applications are considered part of (and are incorporated by reference in) the disclosure of this application.

[0002] This document relates to fluid coupling devices for fluid systems and methods of their use. For example, some embodiments described in this document relate to fluid coupling devices that are configured as non-spill fluid couplings and that are constructed in a compact configuration.

[0003] Fluid systems commonly include components such as tubing, pumps, reservoirs, fittings, couplings, heat exchangers, sensors, filters, valves, seals, and the like. Such components can be connected together in a network to define one or more fluid flow paths.

[0004] Fluid coupling assemblies typically include a female coupling device and a male coupling device that are releasably connected to each other create a fluid flow path therethrough. Such coupling assemblies can be used in various applications, including biomedical applications, beverage dispensing, instrument connections, photochemical handling, liquid cooling, ink handling, and others.

[0005] In the context of some fluid systems, such as a fluid system for liquid cooling of electronics, it may be desirable to use non-spill couplings that have minimal or zero fluid spillage during connection and disconnection of the male and female couplings. Such non-spill couplings will serve to limit the exposure of the electronics to the fluid that could damage the electronics, for example. Such non-spill couplings can also serve to limit air inclusion during the coupling process.

[0006] This document describes fluid coupling devices for fluid systems and methods of their use. For example, some embodiments described in this document relate to fluid coupling devices that are configured as non-spill fluid couplings and that are constructed in a compact configuration.

[0007] In the context of this disclosure, the term “fluid” means any substance that can be made to flow including, but is not limited to, liquids, gases, granular or powdered solids, mixtures or emulsions of two or more fluids, suspensions of solids within liquids or gases, vapors, steam, mists, gels, semi-solids, etc.

[0008] The fluid coupling devices described herein may also be referred to herein as male and female couplings, “coupling halves,” and/or “connectors.” The male couplings may also be referred to herein as “inserts,” and the female couplings may also be referred to herein as “bodies.”

[0009] In some embodiments described herein, the fluid coupling devices described herein have a modular construction. That is, one or both of the coupling halves can include a core module that can be used in various types of fluid coupling outer bodies. In some embodiments, the core module includes a valve and one or more fluid seals.

[0010] In particular embodiments, the fluid coupling devices described herein are specifically designed with one or more mechanical components to configure the devices as “non-spill” coupling devices. The devices described herein are referred to as non-spill coupling devices because as the male and female portions of the coupling devices are being connected to each other and/or disconnected from each other, the designs of the fluid coupling devices will reduce the likelihood of fluid discharge out of the fluid system (for example, by blocking as such discharge paths) and by preventing spillage related to fluid inclusion within the fluid coupling devices. Accordingly, contamination of the surrounding environment can be prevented, and the addition of air into the fluid system as the couplings are connected to each other can be minimized.

[0011] In one aspect, this disclosure is related to a fluid coupling device that includes a housing that defines an internal space and a valve assembly disposed within the internal space. The housing comprises a first housing portion that defines a first internal space portion and a first end opening; a second housing portion that defines a second internal space portion and a second end opening; and a third housing portion coupled to the first and second housing portions, the third housing portion defining a third internal space portion. The valve assembly includes a valve stem and a valve sleeve. The valve assembly is reconfigurable between: (i) a first arrangement in which a fluid flow path between the first and second end openings is open, and (ii) a second arrangement in which the valve assembly blocks the fluid flow path. The third housing portion is disposed at a closed end of the fluid coupling device.

[0012] Such a fluid coupling device may optionally include one or more of the following features. The valve assembly may be within the first internal space portion. A first portion of the fluid flow path may extend through the first internal space portion. A second portion of the fluid flow path may extend through the second internal space portion. A third portion of the fluid flow path may extend through the third internal space portion. The third portion of the fluid flow path may interconnect the first and second portions of the fluid flow path. In some embodiments, a cross-section of the third internal space portion taken orthogonally to an axial direction of the third portion of the fluid flow path is rectangular. An area of the rectangular cross-section of the third internal space may decrease along a direction from an end of the third housing portion that is connected to the first housing portion to an end of the third housing portion that is connected to the second housing portion. In some embodiments, the fluid flow path between the first and second end openings is U-shaped. The first and second end openings may both face in a same direction away from the closed end of the fluid coupling device. The first internal space portion may extend along a first axis. The second internal space portion may extends along a second axis. The third internal space portion may extends along a third axis. The first axis may be spaced apart from and parallel to the second axis. The first axis may be orthogonal to the third axis. The second axis may be orthogonal to the third axis. The first and second axes may be spaced apart from each other and may be each orthogonal to the third axis.

[0013] In another aspect, this disclosure is directed to a fluid coupling system that includes a first fluid coupling device and a second fluid coupling device that is releasably coupleable to the first fluid coupling device. The first fluid coupling device includes a housing defining an internal space and a valve assembly within the internal space. The housing includes a first housing portion that defines a first internal space portion and a first end opening; a second housing portion that defines a second internal space portion and a second end opening; and a third housing portion coupled to the first and second housing portions, the third housing portion defining a third internal space portion. The valve assembly includes a valve stem and a valve sleeve that is spring-biased to a closed position. The second fluid coupling device includes a housing defining an internal space, and a valve assembly within the internal space. The valve assembly includes a valve member that is spring-biased to a closed position. The first and second fluid coupling devices are releasably coupleable in a coupled arrangement by inserting a portion of the housing of the second fluid coupling device into the first internal space portion via the first end opening to open the valve assemblies of the first and second fluid coupling devices and to create an open fluid flow path through the fluid coupling system.

[0014] Such a fluid coupling system may optionally include one or more of the following features. The fluid coupling system may also include a latch member coupled to the first housing portion. The latch member may be configured to releasably latch the first and second fluid coupling devices in the coupled arrangement. The open fluid flow path through the first fluid coupling device may be U-shaped. The open fluid flow path through the second fluid coupling device may be L-shaped.

[0015] Particular embodiments of the subject matter described in this document can be implemented to realize one or more of the following advantages. First, some embodiments of the fluid coupling devices provide an improved non-spill connection and disconnection capability that may advantageously reduce or eliminate fluid spillage in some cases. As such, these embodiments of the fluid coupling devices described herein may be well-suited, for example, for use in fluid systems that provide liquid cooling to electronics such as computers and the like. Another benefit from the non-spill design of the fluid couplings described herein is the minimization of the inclusion of air into the fluid system as the couplings are connected to each other.

[0016] Second, in some embodiments the fluid couplings are advantageously constructed in a compact manner. Such a compact configuration can be beneficial for applications that have a limited amount of space for the fluid couplings to be installed. Installations of the fluid couplings for fluid cooling of computer electronics can be one example of such an application.

[0017] Third, some embodiments of the fluid coupling devices provided herein are advantageously designed with a robust latching system. That is, when the two halves of the coupling are operably connected with each other to provide a fluid flow path therethrough, they are also mechanically locked together. In some embodiments, a wire clip latch member is used to provide the mechanical lock. In some embodiments, to release the lock and separate the two halves of the coupling, the wire clip latch member must first be removed, or a thumb latch must be depressed first. This latching system may reduce the likelihood of unintentional disconnections.

[0018] Fourth, in some embodiments, the fluid coupling devices may advantageously provide an indication of the temperature of the fluid inside of the coupling by comprising a color-changing material (e.g., a thermochromic polymer) which is responsive to temperature. In some embodiments, other techniques for indicating the temperature of the fluid can be used such as, but not limited to, color-changing adhesive labels applied to an outer surface of the coupling(s).

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. In addition, the materials, methods, and examples of the embodiments described herein are illustrative only and not intended to be limiting.

[0020] The details of one or more embodiments of the invention are set forth in the accompanying drawings and the description herein. Other features, objects, and advantages of the invention will be apparent from the description and drawings, and from the claims.

[0037] Like reference numbers represent corresponding parts throughout.

[0038] Referring to FIG. 1, some example embodiments of a fluid coupling system 10 include a female coupling device 100 and a male coupling device 200 that are releasably coupleable to each other. The female coupling device 100 may also be referred to as a body 100 or a first fluid coupling device 100. The male coupling device 200 may also be referred to as an insert 200 or a second fluid coupling device 200.

[0039] The female coupling device 100 includes a housing 110. The housing 110 includes a first housing portion 110a, a second housing portion 110b, and a third housing portion 110c. Each of the housing portions 110a-c defines an internal space.

[0040] The third housing portion 110c is coupled to the first housing portion 110a and second housing portion 110b. The third housing portion 110c extends between the first housing portion 110a and second housing portion 110b. The third housing portion 110c is disposed at a closed end of the fluid coupling device 100.

[0041] The male coupling device 200 includes a housing 210.

[0042] The first housing portion 110a defines a first end opening 114a. The second housing portion 110b defines a second end opening 114b. In the depicted embodiment, the first end opening 114a and the second end opening 114b both face in a same direction away from the third housing portion 110c (which is a closed end of the fluid coupling device 100).

[0043] The first end opening 114a is configured to receive a portion of the housing 210 of the male coupling device 200 when the female coupling device 100 and the male coupling device 200 are releasably coupled to each other in an operable configuration that creates an open fluid flow path through the female coupling device 100 and the male coupling device 200. When the female coupling device 100 and the male coupling device 200 are uncoupled from each other (as shown in FIG. 1) there is no open fluid flow path through either of the female coupling device 100 or the male coupling device 200. That is the case because each of the female coupling device 100 and the male coupling device 200 have internal valves that are biased to closed arrangements (as described further below).

[0044] The second end opening 114b of the female coupling device 100 is a connection point (or “termination” 114b) that can be used to couple the female coupling device 100 to various types of fluid-carrying members (e.g., a tube, a manifold, a pipe, a rail, a fitting, etc.). In the depicted embodiment, the second end opening 114b is simply an open port. In some embodiments, an adapter (e.g., a nipple, a spud, a threaded portion (refer to the optional example in FIG. 2), a hose barb, a compression fitting, etc.) can be used to connect the chosen type of fluid-carrying member to the female coupling device 100 via the second end opening 114b

[0045] The male coupling device 200 includes a connection point 202 (or “termination” 202) that can be used to couple the male coupling device 200 to various types of fluid-carrying members (e.g., a tube, a manifold, a pipe, a rail, a fitting, etc.). In the depicted embodiment, the connection point 202 is a barbed termination. In other embodiments, the connection point 202 can be any other type of termination such as, but not limited to, a threaded portion, a compression fitting, a sanitary fitting, a luer fitting, and the like, without limitation).

[0046] While the termination 114b of the female coupling device 100 is depicted as an open port, and the termination 202 of the male coupling device 200 is depicted as a barbed connection, it should be understood that the female coupling device 100 and/or the male coupling device 200 can have any type of connections/terminations such as, but not limited to, threaded connections, elbows, tees, sanitary fittings, compression fittings, and the like, and combinations thereof.

[0047] The materials from which one or more of the components of the fluid coupling system 10 are made of include thermoplastics and/or thermosets. In particular embodiments, the materials from which the components of the fluid coupling system 10 are made of are thermoplastics, such as, but not limited to, acetal, ABS, polycarbonate, polysulfone, polyether ether ketone, polysulphide, polyester, polyvinylidene fluoride (PVDF), polyethylene, Perfluoropolymers (PFA, PTFE, PCTFE and the like), polyphenylsulfone (PPSU; e.g., Radel®), polyetherimide (PEI; e.g., Ultem®), polypropylene, polyphenylene, polyaryletherketone, Perfluoropolymers (PFA, PTFE, PCTFE and the like) and the like, and combinations thereof. In some embodiments, the thermoplastics can include one or more fillers such as, but not limited to, glass fiber, glass bead, carbon fiber, talc, etc.

[0048] In some embodiments, the materials from which one or more of the components of the fluid coupling system 10 are made of include metals such as, but not limited to stainless steel, brass, aluminum, plated steel, zinc, and the like. In particular embodiments, one or both of the female coupling device 100 and the male coupling device 200 is/are metallic-free. In some embodiments, one or both of the female coupling device 100 and the male coupling device 200 includes one or more plastic (e.g., PEEK, PPS, etc.) or metallic spring members (e.g., PEEK, PPS, etc.) or metallic spring members (e.g., spring steel, stainless steel such as 316 L, piano/music wire, beryllium copper, titanium, Hastelloy®, Inconel®, and the like). In some embodiments, such spring members can be made an elastomeric material.

[0049] In certain embodiments, fluid coupling system 10 includes one or more gaskets or seals that are made of materials such as, but not limited to, silicone, fluoroelastomers (FKM), ethylene propylene diene monomer (EPDM), perfluoroelastomers (e.g., FFKM, Kalrez®, Chemraz® and the like), thermoplastic elastomers (TPE), buna, buna-N, thermoplastic vulcanizates (TPV), and the like. In some embodiments, the gaskets or seals can have a cross-sectional shape that is an hourglass-shape, an oval shape, a circular shape, D-shaped, X-shaped, square, rectangular, U-shaped, L-shaped, V-shaped, a polygonal shape, a multi-lobe shape, or any other suitable shape, without limitation.

[0050] In some embodiments, the couplings or portions thereof can be constructed from a color-changing material (e.g., a thermochromic polymer) that is responsive to temperature. Accordingly, the color of such a coupling can provide an indication of the temperature of the fluid inside of the coupling. In some embodiments, other techniques for indicating the temperature of the fluid can be used such as, but not limited to, color-changing adhesive labels applied to an outer surface of the coupling(s).

[0051] It should be understood that the components of the fluid coupling system 10 (e.g., the female coupling device 100 and the male coupling device 200) are scalable to virtually any desired size. Accordingly, the fluid coupling system 10 can be scaled to connect a wide range of different conduits or tubing sizes from very small conduits/tubing (e.g., 3 mm in diameter or smaller) to very large conduits/tubing (e.g., 50 mm in diameter or larger).

[0052] FIG. 2 shows longitudinal cross-sectional views of the female coupling device 100 and the male coupling device 200. In these views, it can be seen that the female coupling device 100 includes a valve assembly 120 and the male coupling device 200 includes a valve assembly 220. In the depicted arrangements, the valve assembly 120 and the valve assembly 220 are each in a closed arrangement in which the valve assembly 120 and the valve assembly 220 block fluid flow through the female coupling device 100 and the male coupling device 200, respectively.

[0053] As described above, the female coupling device 100 includes the first housing portion 110a, the second housing portion 110b, and the third housing portion 110c. Now in FIG. 2, it can be seen that the first housing portion 110a defines a first internal space portion 112a that extends along a first axis 111a. The second housing portion 110b defines a second internal space portion 112b that extends along a second axis 111b. The third housing portion 110c defines a third internal space portion 112c that extends along a third axis 111c (also refer to FIG. 5). The third internal space portion 112c fluidly interconnects the first internal space portion 112a and the second internal space portion 112b. In other words, when the valve assembly 120 is in its open configuration, the first end opening 114a and the second end opening 114b are in fluid communication via a series combination of the first internal space portion 112a, the second internal space portion 112b, and the third internal space portion 112c.

[0054] It can be seen that in the depicted embodiment, the first axis 111a is orthogonal to the third axis 111c. In addition, the second axis 111b is orthogonal to the third axis 111c. Further, in the depicted embodiment the first axis 111a and the second axis 111b are spaced apart from each other, are parallel to each other, and are each orthogonal to the third axis 111c. In other words, when the valve assembly 120 is in its open configuration, it can be said that the fluid flow path between the first end opening 114a and the second end opening 114b is “U-shaped.”

[0055] The valve assembly 120 is located within the housing's first internal space portion 112a. The valve assembly 120 includes a valve stem 122 (see also FIG. 7) and a valve sleeve 126 surrounding the valve stem 122. The valve sleeve 126 is translatable (reconfigurable) along the valve stem 122 (and along the first axis 111a) between: (i) a first arrangement (as shown in FIG. 4) in which a fluid flow path between the first end opening 114a and second end opening 114b is open, and (ii) a second arrangement (as shown in FIG. 2) in which the valve assembly 120 blocks the fluid flow path. The valve assembly 120 also includes a spring 128 that spring-biases the valve sleeve 126 to the second arrangement (closed arrangement).

[0056] The male coupling device 200 includes the valve assembly 220 within the housing's internal space 212. The valve assembly 220 includes a valve member 222 (see also FIG. 6) and a spring 228. The valve member 222 is translatable (reconfigurable) within the internal space 212 between: (i) a first arrangement (as shown in FIG. 4) in which a fluid flow path through the male coupling device 200 is open, and (ii) a second arrangement (as shown in FIG. 2) in which the valve assembly 220 blocks the fluid flow path through the male coupling device 200. The 228 spring-biases the valve member 222 to the second arrangement (closed arrangement). When the valve member 222 is in its open arrangement, the fluid flow path through the male coupling device 200 is “L-shaped” in the depicted embodiment (without limitation).

[0057] The female coupling device 100 includes multiple seals, e.g., a first seal disposed between the valve stem 122 and the valve sleeve 126 (when the valve sleeve 126 is in its closed arrangement), a second seal disposed between the valve sleeve 126 and the interior wall of the first housing portion 110a (when the valve sleeve 126 is in its closed arrangement), and a third seal that becomes disposed between the interior wall of the first housing portion 110a and an exterior wall of the housing 210 of the male coupling device 200 when the female coupling device 100 and the male coupling device 200 are partially and/or fully coupled together.

[0058] The male coupling device 200 includes a seal disposed between the valve member 222 and the interior wall of the housing 210 (when the valve member 222 is in its closed arrangement).

[0059] FIG. 3 shows the fluid coupling system 10 in its operative configuration (or fully coupled configuration) in which the female coupling device 100 and the male coupling device 200 are releasably coupled to each other to create an open fluid flow path through the fluid coupling system 10 (i.e., between the opening defined by the termination 202 and the second end opening 114b).

[0060] The female coupling device 100 also includes a latch member 130 (e.g., a wire clip or retainer). The latch member 130 engages into a circumferential groove 214 (see FIG. 2) to releasably latch the female coupling device 100 and the male coupling device 200 together in the operative configuration. To uncouple the female coupling device 100 and the male coupling device 200, the latch member 130 can be manually disengaged from the circumferential groove 214 by pulling the latch member 130 outwardly away from the housing 110 of the female coupling device 100. Alternatively, in some embodiments another type of latching mechanism can be used instead of the latch member 130. Some such latching mechanisms can include spring-loaded clips that are a part of the female coupling device 100, and that are manually depressible to uncouple the female coupling device 100 and the male coupling device 200. Such a spring-loaded clip can be releasably engaged in the circumferential groove 214 of the male coupling device 200, and then become disengaged from the circumferential groove 214 when manually depressed.

[0061] FIG. 4 shows a longitudinal cross-sectional view of the female coupling device 100 and the male coupling device 200 with the fluid coupling system 10 in its operative configuration in which the female coupling device 100 and the male coupling device 200 are releasably coupled to each other to create an open fluid flow path through the fluid coupling system 10 (i.e., between the opening defined by the termination 202 and the second end opening 114b). In these views, it can be seen that the valve sleeve 126 of the female coupling device 100 and the valve member 222 of the male coupling device 200 are in their first, open arrangements.

[0062] To arrive at the depicted coupled arrangement (as compared to the uncoupled arrangement of FIG. 2), as the housing 210 of the male coupling device 200 was inserted into the first end opening 114a of the female coupling device 100, the face of the valve stem 122 pushed the valve member 222 against its spring 228 to its open position, and the end face of the housing 210 pushed the valve sleeve 126 against its spring 128 to its open position. The second and third seals of the female coupling device 100 seal against the exterior wall of the housing 210 of the male coupling device 200.

[0063] During the process of coupling the female coupling device 100 and the male coupling device 200, the multiple seals of the couplings function to reduce or eliminate the potential for air inclusion during the coupling process. In addition, the multiple seals of the couplings function to reduce or eliminate the potential for fluid spillage during the uncoupling process. The placement and function of the seals are illustrated and described, for example, in U.S. Pat. Nos. 11,067,210, 11,060,650, and U.S. patent application Ser. No. 16/670,294 (which are hereby incorporated herein by reference in their entireties).

[0064] FIG. 5 shows an exploded view of the third internal space portion 112c of the female coupling device 100. It can be seen that the third internal space portion 112c is flat and wide. This flat and wide configuration of the third internal space portion 112c, and the fact that the third internal space portion 112c interconnects the first internal space portion 112a to the second internal space portion 112b, advantageously enables the female coupling device 100 to have a compact, low profile.

[0065] It can be seen that, in the depicted embodiment, a cross-section of the third internal space portion 112c taken orthogonally to the third axis 111c (i.e., the direction of the fluid flow path) is oblong or rectangular. In some embodiments, a ratio of the width dimension to the height dimension of the third internal space portion 112c taken orthogonally to the third axis 111c is in a range of 8:1 to 12:1, or 6:1 to 10:1, or 4:1 to 8:1, or 9:1 to 14:1, without limitation. Moreover, an area of the oblong/rectangular cross-section of the third internal space 111c decreases along a direction from an end of the third housing portion 110c that is connected to the first housing portion 110a to an end of the third housing portion 110c that is connected to the second housing portion 110b. The third housing portion 110c includes one or more ribs 113c within the third internal space portion 112c that can support the valve stem 122 and/or that can provide guidance for fluid flow through the third internal space portion 112c.

[0066] FIG. 8 depicts another example fluid coupling system. As shown, some example embodiments of the fluid coupling system 30 include a female coupling device 300 and a male coupling device 400 that are releasably coupleable to each other. The female coupling device 300 may also be referred to as a body 300 or a first fluid coupling device 300. The male coupling device 400 may also be referred to as an insert 400 or a second fluid coupling device 400.

[0067] The female coupling device 300 includes a housing 310. The housing 310 includes a first housing portion 310a, a second housing portion 310b, and a third housing portion 310c. Each of the housing portions 310a-c defines an internal space.

[0068] The third housing portion 310c is coupled to the first housing portion 310a and to the second housing portion 310b. The third housing portion 310c extends between the first housing portion 310a and the second housing portion 310b. The third housing portion 310c is disposed at a closed end of the fluid coupling device 300.

[0069] The male coupling device 400 includes a housing 410.

[0070] The first housing portion 310a defines a first end opening 314a. The second housing portion 310b defines a second end opening 314b. In the depicted embodiment, the first end opening 314a and the second end opening 314b both face in a same direction away from the third housing portion 310c (which is a closed end of the fluid coupling device 300).

[0071] The first end opening 314a is configured to receive a portion of the housing 410 of the male coupling device 400 when the female coupling device 300 and the male coupling device 400 are releasably coupled to each other in an operable configuration that creates an open fluid flow path through the female coupling device 300 and the male coupling device 400 (e.g., as shown in FIGS. 10 and 11). When the female coupling device 300 and the male coupling device 400 are uncoupled from each other (as shown in FIGS. 8 and 9) there is no open fluid flow path through either of the female coupling device 300 or the male coupling device 400. That is the case because each of the female coupling device 300 and the male coupling device 400 have internal valves that are biased to closed arrangements (as described further below).

[0072] The second end opening 314b of the female coupling device 300 is a connection point (or “termination” 314b) that can be used to couple the female coupling device 300 to various types of fluid-carrying members (e.g., a tube, a manifold, a pipe, a rail, a fitting, etc.). In the depicted embodiment, the second end opening 314b is simply an open port. In some embodiments, an adapter (e.g., a nipple, a spud, a threaded portion, a hose barb, a compression fitting, etc.) can be used to connect the chosen type of fluid-carrying member to the female coupling device 300 via the second end opening 314b.

[0073] The male coupling device 400 includes a connection point 402 (or “termination” 402) that can be used to couple the male coupling device 400 to various types of fluid-carrying members (e.g., a tube, a manifold, a pipe, a rail, a fitting, etc.). In the depicted embodiment, the connection point 402 is a barbed termination. In other embodiments, the connection point 402 can be any other type of termination such as, but not limited to, a threaded portion, a compression fitting, a sanitary fitting, a luer fitting, and the like, without limitation).

[0074] While the termination 314b of the female coupling device 300 is depicted as an open port, and the termination 402 of the male coupling device 400 is depicted as a barbed connection, it should be understood that the female coupling device 300 and/or the male coupling device 400 can have any type of connections/terminations such as, but not limited to, threaded connections, elbows, tees, sanitary fittings, compression fittings, and the like, and combinations thereof.

[0075] The individual components (e.g., bodies, valve members, springs, seals, etc.) of the fluid coupling assembly 30 can be configured like any of the variations, and made of any of the materials, as described above regarding the fluid coupling assembly 10.

[0076] In some embodiments, the couplings 300 and 400, or portions thereof, can be constructed from a color-changing material (e.g., a thermochromic polymer) that is responsive to temperature. Accordingly, the color of such a coupling can provide an indication of the temperature of the fluid inside of the coupling. In some embodiments, other techniques for indicating the temperature of the fluid can be used such as, but not limited to, color-changing adhesive labels applied to an outer surface of the coupling(s).

[0077] It should be understood that the components of the fluid coupling system 30 (e.g., the female coupling device 300 and the male coupling device 400) are scalable to virtually any desired size. Accordingly, the fluid coupling system 30 can be scaled to connect a wide range of different conduits or tubing sizes from very small conduits/tubing (e.g., 3 mm in diameter or smaller) to very large conduits/tubing (e.g., 50 mm in diameter or larger).

[0078] FIG. 9 shows longitudinal cross-sectional views of the female coupling device 300 and the male coupling device 400. In these views, it can be seen that the female coupling device 300 includes a valve assembly 320 and the male coupling device 400 includes a valve assembly 420. In the depicted arrangements, the valve assembly 320 and the valve assembly 420 are each in a closed arrangement in which the valve assembly 320 and the valve assembly 420 block fluid flow through the female coupling device 300 and the male coupling device 400, respectively.

[0079] As described above, the female coupling device 300 includes the first housing portion 310a, the second housing portion 310b, and the third housing portion 310c. Now in FIG. 9, it can be seen that the first housing portion 310a defines a first internal space portion 312a that extends along a first axis 311a. The second housing portion 310b defines a second internal space portion 312b that extends along a second axis 311b. The third housing portion 310c defines a third internal space portion 312c that extends along a third axis 311c (also refer to FIG. 12). The third internal space portion 312c fluidly interconnects the first internal space portion 312a and the second internal space portion 312b. In other words, when the valve assembly 320 is in its open configuration, the first end opening 314a and the second end opening 314b are in fluid communication via a series combination of the first internal space portion 312a, the second internal space portion 312b, and the third internal space portion 312c.

[0080] It can be seen that in the depicted embodiment, the first axis 311a is substantially orthogonal to the third axis 311c. In addition, the second axis 311b is substantially orthogonal to the third axis 311c. Further, in the depicted embodiment the first axis 311a and the second axis 311b are spaced apart from each other, are substantially parallel to each other, and are each substantially orthogonal to the third axis 311c. In other words, when the valve assembly 320 is in its open configuration, it can be said that the fluid flow path between the first end opening 314a and the second end opening 314b is “U-shaped.”

[0081] The valve assembly 320 is located within the housing's first internal space portion 312a. The valve assembly 320 includes a valve stem 322 (see also FIG. 14) and a valve sleeve 326 surrounding the valve stem 322. The valve sleeve 326 is translatable (reconfigurable) along the valve stem 322 (and along the first axis 311a) between: (i) a first arrangement (as shown in FIG. 11) in which a fluid flow path between the first end opening 314a and second end opening 314b is open, and (ii) a second arrangement (as shown in FIG. 9) in which the valve assembly 320 blocks the fluid flow path. The valve assembly 320 also includes a spring 328 that extends into an annular pocket defined by the valve sleeve 326 and spring-biases the valve sleeve 326 to the second arrangement (closed arrangement). The valve assembly 320 also includes a seal 324 disposed in a seal recess of the valve stem 322. The seal 324 creates a fluid tight seal between the valve stem 322 and the valve sleeve 326 when the valve sleeve 326 is in its second arrangement in which the fluid flow path is blocked.

[0082] The male coupling device 400 includes the valve assembly 420 within the housing's internal space 412. The valve assembly 420 includes a valve member 422 (see also FIG. 13), a seal 424, and a spring 428. The valve member 422 is translatable (reconfigurable) within the internal space 412 between: (i) a first arrangement (as shown in FIG. 11) in which a fluid flow path through the male coupling device 400 is open, and (ii) a second arrangement (as shown in FIG. 9) in which the valve assembly 420 blocks the fluid flow path through the male coupling device 400. The 428 spring-biases the valve member 422 to the second arrangement (closed arrangement). The seal 424 is disposed in a seal recess of the valve member 422. The seal 424 creates a fluid tight seal between the valve member 422 and the main body 410 when the valve member 422 is in its second arrangement in which the fluid flow path is blocked. The main body 410 includes an annular sealing surface that is oriented at an angle of about 45° relative to a central longitudinal axis 411b along which the valve member 422 translates.

[0083] When the valve member 422 is in its open arrangement, the fluid flow path through the male coupling device 400 is “L-shaped” in the depicted embodiment (without limitation). Said another way, the main body 410 defines a first central longitudinal axis 411a and a second central longitudinal axis 411b. The first central longitudinal axis 411a is substantially perpendicular to the second central longitudinal axis 411b.

[0084] The female coupling device 300 includes multiple seals, e.g., the seal 324 disposed between the valve stem 322 and the valve sleeve 326 (when the valve sleeve 326 is in its closed arrangement), a second seal 325a disposed between the valve sleeve 326 and the interior wall of the first housing portion 310a (when the valve sleeve 326 is in its closed arrangement), and a third seal 325b that becomes disposed between the interior wall of the first housing portion 310a and an exterior wall of the housing 410 of the male coupling device 400 when the female coupling device 300 and the male coupling device 400 are partially and/or fully coupled together. A spacer 325c is disposed between the seals 325a-b.

[0085] FIG. 10 shows the fluid coupling system 30 in its operative configuration (or fully coupled configuration) in which the female coupling device 300 and the male coupling device 400 are releasably coupled to each other to create an open fluid flow path through the fluid coupling system 30 (i.e., between the opening defined by the termination 402 and the second end opening 314b).

[0086] The male coupling device 400 also includes a latch member 430 (also see FIGS. 16-18) that is movably coupled to the housing 410. The latch member 430 is movable (translatable or slidable) relative to the housing 410 along the first central longitudinal axis 411a (FIG. 9). The latch member 430 can be moved toward the housing 410 by manually depressing a surface 434. The latch member 430 also includes a biasing member 436. In the depicted embodiment, the biasing member 436 is a flexible cantilevered member that abuts the housing 410. In some embodiments, the biasing member 436 can be a coil spring or a torsion spring. When a force is exerted on the surface 434, the biasing member 436 is caused to elastically deflect. When the force is discontinued, the biasing member 436 springs back so that the latch member 430 moves away from the housing 410 to its default position (e.g., as shown in FIGS. 8 and 9).

[0087] The latch member 430 includes an arcuate projection 432 is releasably engageable with a circumferential groove 315 defined by the first housing portion 310a of the female coupling device 300 to releasably latch the female coupling device 300 and the male coupling device 400 together in the operative configuration.

[0088] During the process of coupling the male coupling device 400 and the female coupling device 300 (by moving the male coupling device 400 and the female coupling device 300 toward each other), a beveled edge 432b (FIG. 9) of the arcuate projection 432 will come into contact with an annular beveled surface surrounding the first end opening 314a of the female coupling device 300. The contact between the bevels will cause the latch member 430 to be forced toward the housing 410 as the male coupling device 400 and the female coupling device 300 are pushed toward each other. This also loads the biasing member 436. As the male coupling device 400 and the female coupling device 300 are pushed farther together, the biasing member 436 will cause the arcuate projection 432 to snap into engagement with the circumferential groove 315. This latches the male coupling device 400 and the female coupling device 300 is the fully operational, coupled arrangement in which the valves 320 and 420 are open and a flow path is opened through the fluid coupling system 30 (i.e., between the opening defined by the termination 402 and the second end opening 314b). While the male coupling device 400 and the female coupling device 300 remain latched together, the male coupling device 400 can be rotated 360° around the first axis 311a relative to the female coupling device 300 to obtain any desired configuration of the fluid coupling system 30.

[0089] The arcuate projection 432 extends less than 180° around the central longitudinal axis 411b. To uncouple the female coupling device 300 and the male coupling device 400, the latch member 430 can be manually disengaged from the circumferential groove 315 by pushing the surface 434 of the latch member 430 toward from the housing 310 of the female coupling device 300. This disengages the arcuate projection 432 from the circumferential groove 315. The male coupling device 400 can then be separated from the female coupling device 300. The springs 328 and 428 will naturally assist with the separation of the male coupling device 400 and the female coupling device 300.

[0090] FIG. 11 shows a longitudinal cross-sectional view of the female coupling device 300 and the male coupling device 400 with the fluid coupling system 30 in its operative configuration in which the female coupling device 300 and the male coupling device 400 are releasably coupled to each other to create an open fluid flow path through the fluid coupling system 30 (i.e., between the opening defined by the termination 402 and the second end opening 314b). In these views, it can be seen that the valve sleeve 326 of the female coupling device 300 and the valve member 422 of the male coupling device 400 are in their first, open arrangements.

[0091] To arrive at the depicted coupled arrangement (as compared to the uncoupled arrangement of FIG. 9), as the housing 410 of the male coupling device 400 was inserted into the first end opening 314a of the female coupling device 300, the face of the valve stem 322 pushed the valve member 422 against its spring 428 to its open position, and the end face of the housing 410 pushed the valve sleeve 326 against its spring 328 to its open position. The second seal 325a and the third seal 325b of the female coupling device 300 seal against the exterior wall of the housing 410 of the male coupling device 400.

[0092] During the process of coupling the female coupling device 300 and the male coupling device 400, the multiple seals of the coupling devices 300 and 400 function to reduce or eliminate the potential for air inclusion during the coupling process. In addition, the multiple seals of the coupling devices 300 and 400 function to reduce or eliminate the potential for fluid spillage during the uncoupling process. The placement and function of the seals are illustrated and described, for example, in U.S. Pat. Nos. 11,067,210, 11,060,650, and U.S. patent application Ser. No. 16/670,294 (which are hereby incorporated herein by reference in their entireties).

[0093] FIG. 12 shows an exploded view of the third internal space portion 312c of the female coupling device 300. It can be seen that the third internal space portion 312c is flat and wide. This flat and wide configuration of the third internal space portion 312c, and the fact that the third internal space portion 312c interconnects the first internal space portion 312a to the second internal space portion 312b, advantageously enables the female coupling device 300 to have a compact, low profile.

[0094] It can be seen that, in the depicted embodiment, a cross-section 15-15 (see also FIG. 15) of the third internal space portion 312c taken orthogonally to the third axis 311c (i.e., the direction of the fluid flow path) is oblong or rectangular, with a central rib 313c. In some embodiments, a ratio of the width dimension to the height dimension of the third internal space portion 312c taken orthogonally to the third axis 311c is in a range of 8:1 to 12:1, or 6:1 to 10:1, or 4:1 to 8:1, or 9:1 to 14:1, without limitation. Moreover, an area of the oblong/rectangular cross-section of the third internal space 311c decreases along a direction from an end of the third housing portion 310c that is connected to the first housing portion 310a to an end of the third housing portion 310c that is connected to the second housing portion 310b. The third housing portion 310c includes one or more ribs 313c within the third internal space portion 312c that can support the valve stem 322, increase the bending resistance of the third housing portion 310c, and/or that can provide guidance for fluid flow through the third internal space portion 312c.

[0095] Axes that are said to be substantially perpendicular or orthogonal to each other means that the axes define an angle of 90°+/−5° or 90°+/−10°. Axes that are said to be substantially parallel to each other means that the axes define an angle of 0°+/−5° or 0°+/−10°. When an angle is said to be “about” X° (a certain number of degrees), that means a tolerance of X°+/−5° or X°+/−10°.

[0096] While this specification contains many specific implementation details, these should not be construed as limitations on the scope of any invention or of what may be claimed, but rather as descriptions of features that may be specific to particular embodiments of particular inventions. Certain features that are described in this specification in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination. Moreover, although features may be described herein as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination.

[0097] Similarly, while operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. Moreover, the separation of various system modules and components in the embodiments described herein should not be understood as requiring such separation in all embodiments.