Diaphragm check valve

Abstract

A check valve assembly includes an upstream valve support surface, a fluid passage extending through the upstream valve support surface, and a channel extending into the upstream valve support surface, the channel having a bottom surface spaced apart from the upstream valve support surface; and a valve body including a mounting rim, a valve diaphragm, and an annular isolation bridge extending between the mounting rim and the valve diaphragm, wherein the valve diaphragm includes an upstream facing surface and the annular isolation bridge includes a top end. A distance between the upstream valve support surface and the bottom surface of the channel is less than a distance between the upstream facing surface of the valve diaphragm and the top end of the annular isolation bridge.

Description

[0001] This application is a divisional application of an application with an application date of November 7, 2018, application number 201880072091.6 (international application number PCT / US2018 / 059653), and invention name “Diaphragm Check Valve”. Technical Field

[0002] The present disclosure relates to controlling the direction of fluid flow. More particularly, the present description relates to controlling fluid flow using a check valve. Background Art

[0003] A check valve is a one-way valve that allows fluid to move through a valve body in a first direction and restricts reverse fluid flow through the valve body in a second direction that is generally different from the first direction.

[0004] Check valves can be used in many types of applications, including: pumps, such as piston-driven pumps and diaphragm pumps; fluid systems for industrial processes, including chemical plants and power plants; fluid control systems, such as irrigation sprinklers and drip irrigation; and in medical applications, such as check valves for ventricular and intravenous fluid delivery.

[0005] A check valve may include a valve body, typically shaped as a flat disk, that forms a diaphragm. The diaphragm may have a slit that forms one or more valve segments. These valve segments may engage one another in a closed position to resist fluid flow through the valve body, and the valve segments may move relative to one another to open the valve body and allow fluid flow through the valve body.

[0006] A check valve can have a normally closed configuration, wherein the valve body is in a closed position to resist the flow of fluid through the valve body. The check valve can be moved to an open position by fluid pressure or engagement of the fluid with the valve body, thereby allowing fluid to flow therethrough. The force or pressure required to move the valve body to the open position is referred to as the cracking pressure. The cracking pressure can be the pressure at the inlet (e.g., upstream) of the check valve at which the first indication of flow through the valve body occurs. In some check valves, the valve body moves to the open position when a positive pressure differential is applied to the valve body, such as when the pressure upstream of the valve body is greater than the pressure downstream of the valve body.

[0007] In the open position, a check valve allows fluid to flow through the valve body with minimal pressure loss. When the positive pressure differential is reduced, eliminated, or reversed, the check valve can move to the closed position. In some cases, the inherent elasticity of the valve body enables the valve body to move to the closed position. A negative pressure differential (for example, when the fluid pressure downstream of the valve body is greater than the fluid pressure upstream of the valve body) can cause the valve body to move to the closed position. In the closed position, the check valve can resist fluid backflow of at least 30 psi. Summary of the Invention

[0008] A check valve may not function as intended when the valve body does not move to the closed position or resist the backflow of fluid. A check valve may not function as intended when particles or debris become lodged in the valve body or another part of the check valve.

[0009] Fluid pressure caused by fluid backflow acting on the valve body may cause a portion of the valve body to move into or engage with the housing or retaining feature, thereby causing the valve body to stretch, thereby forming a gap between the valve segments or affecting the intended operation of the check valve.

[0010] Furthermore, a check valve may fail to function as intended due to the engagement of the valve body with the housing or other valve retaining structure. The coupling of the valve body to the housing may involve axial compression of a portion of the valve body. For example, the outer periphery or edge of the valve body may be axially compressed. This axial compression may direct force toward the valve segments, thereby causing them to buckle or bulge, thereby creating gaps between the segments. Axial compression of the valve body may also generate radially outward forces, causing the valve body or segments to pull apart, thereby creating gaps between the segments.

[0011] The axial or radial force directed toward the valve body can be adjusted to achieve the desired performance characteristics of the check valve. However, excessive axial or radial force may increase the cracking pressure beyond the desired value. For example, a 0.5-inch valve body with a 0.25-inch diameter across the valve diaphragm can be optimally sealed with a radial compression of approximately 0.0001 to 0.001 inches of the valve body. However, radial compression exceeding 0.001 inches may begin to adversely affect the seal between the valve segments, causing the valve body to bulge or form channels through it. Actual manufacturing tolerances for valve bodies may be approximately 0.001 to 0.002 inches. If manufacturing tolerances of any portion of the retaining features, valve housing, and valve body are included, the combined difference in radial compression may be between approximately 0.002 and 0.004 inches, which may adversely affect the seal between the valve segments. Manufacturing becomes even more complex when considering that maintaining a manufacturing tolerance of less than 0.001 inches can increase manufacturing costs, manufacturing effort, and the rate of substandard check valves.

[0012] Other reasons why a check valve may not function as intended include gaps formed in or between the valve segments due to the manufacturing process (including, for example, operations that create slits through the valve diaphragm). Additionally, a check valve may not function as intended when the valve body is not seated or coupled to the housing as intended by the check valve design.

[0013] According to at least some embodiments disclosed herein, it is recognized that although check valves may be designed with specific performance characteristics, certain issues may arise during the manufacture, assembly, and use of the check valves. For example, manufacturing variations may alter the performance or operation of the check valves, the check valves may be manufactured or assembled incorrectly, and debris from manufacturing or fluid flow may become lodged in the check valves.

[0014] One aspect of the present disclosure provides a check valve assembly comprising: a valve support surface having a first support surface and a second support surface, the second support surface being positioned radially outward relative to the first support surface; and a valve body comprising a mounting rim, a valve diaphragm extending radially inward from the mounting rim and having a valve segment defined by a slit; and an annular isolation bridge extending between the mounting rim and the valve diaphragm; wherein a distance from the first support surface to a nearest surface of the valve diaphragm is greater than a distance from the second support surface to a nearest surface of the annular isolation bridge.

[0015] Some examples of the present disclosure provide a method of controlling flow through a check valve assembly, comprising: defining a fluid passage having a valve support surface, wherein the valve support surface includes a first support surface and a second support surface, the second support surface being radially outward relative to the first support surface; positioning a valve body adjacent to the valve support surface, wherein the valve body includes a valve diaphragm and an annular isolation bridge, the valve diaphragm being configured to resist fluid flow through the fluid passage, the valve diaphragm having a valve segment defined by a slit, the annular isolation bridge extending radially outward from the valve diaphragm; wherein, when the valve body moves toward the valve support surface, the isolation bridge engages the second support surface before the valve diaphragm engages the first support surface.

[0016] The additional features and advantages of the subject technology will be set forth in the following description, and some features and advantages will be apparent from the description, or may be learned by practicing the subject technology. The advantages of the subject technology will be realized and obtained through the structures and embodiments thereof specifically pointed out in the written description and the accompanying drawings.

[0017] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the subject technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The various features of the illustrative embodiments are described below with reference to the accompanying drawings. The illustrated embodiments are intended to illustrate and not to limit the present disclosure. The drawings include the following figures:

[0019] Figure 1 is a cross-sectional perspective view of a diaphragm check valve according to some embodiments.

[0020] Figure 2 is a cross-sectional exploded view of a diaphragm check valve according to some embodiments.

[0021] Figure 3 is a perspective view of a housing of a diaphragm check valve according to some embodiments.

[0022] Figure 4 is a perspective view of another housing of a diaphragm check valve according to some embodiments.

[0023] Figure 5A is a top perspective view of a valve body of a diaphragm check valve according to some embodiments.

[0024] Figure 5B is a bottom perspective view of a valve body of a diaphragm check valve according to some embodiments.

[0025] Figure 5C is a side elevation view of a valve body of a diaphragm check valve according to some embodiments.

[0026] Figure 6 yes Figure 5C Cross-sectional side view of the valve body.

[0027] Figure 7 yes Figure 1 Cross-sectional detail of a diaphragm check valve.

[0028] Figure 8A is a cross-sectional view of a diaphragm check valve in an open position, according to some embodiments.

[0029] Figure 8B is a cross-sectional view of a diaphragm check valve in a closed position, according to some embodiments. DETAILED DESCRIPTION

[0030] It should be understood that the various configurations of the subject technology will become apparent to those skilled in the art from this disclosure, wherein the various configurations of the subject technology are shown and described by way of illustration. As will be appreciated, the subject technology can have other and different configurations, and its several details can be modified in various other aspects, all without departing from the scope of the subject technology. Therefore, the summary of the invention, the drawings and the detailed description should be regarded as illustrative in nature, and not restrictive.

[0031] The detailed description set forth below is intended to be a description of the various configurations of the subject technology, and is not intended to represent that the only configuration of the subject technology can be put into practice. The accompanying drawings are incorporated herein and constitute a part of the specific embodiment. For the purpose of providing a thorough understanding of the subject technology, the specific embodiment includes specific details. However, it will be apparent to those skilled in the art that the subject technology can be implemented without these specific details. In some cases, well-known structures and components are shown in block diagram form to avoid blurring the concept of the subject technology. For ease of understanding, similar components are marked with similar element numbers.

[0032] According to at least some embodiments, a check valve is disclosed herein that can resist buckling or bulging of the valve body by reducing the force (including both axial and radial forces) transmitted from the housing or valve retaining features toward the valve body. For example, the force transmitted to the valve diaphragm can be reduced, allowing the valve diaphragm to seal against fluid flow through the valve body without buckling or bulging. Furthermore, features of at least some embodiments of the diaphragm check valve disclosed herein can reduce the cracking pressure of the valve body.

[0033] In at least some embodiments disclosed herein, the disclosed apparatus can resist movement of the valve body, thereby preventing undesired contact or stretching of the valve body with the housing or other parts of the check valve. In addition, at least some embodiments disclosed herein provide a check valve with reduced manufacturing complexity and reduced tolerance requirements.

[0034] Figure 1 A cross-sectional view of a diaphragm check valve 100 is shown according to some embodiments of the present disclosure. The check valve 100 may include a valve body 102 and a valve support surface 104. Optionally, a valve housing 106 may include the valve support surface 104. It should be understood that although the present disclosure includes references to the housing 106, the valve support surface 104 may be formed as part of another structure adjacent to the valve body 102. For example, the valve support surface 104 may be formed as a separate component positioned within a fluid path and adjacent to the valve body. The valve support surface 104 may be associated with a fluid path of a device such as a pump or a fluid path within a ventricle. In another example, the valve support surface 104 may be formed as part of a surface in a device such as a pump. In yet another example, the valve support surface 104 may be formed as part of the valve body.

[0035] The valve body 102 and the valve support surface 104 are positioned relative to each other such that a portion of the valve body 102 can engage the valve support surface 104 during at least a portion of operation of the valve body. For example, the valve body 102 and the valve support surface 104 can be oriented relative to each other such that when the valve body 102 is in an open position, a portion of the valve body engages the valve support surface 104 to allow fluid to move through the check valve 100. The valve body 102 and the valve support surface 104 can also be oriented relative to each other such that when the valve body 102 is in a closed position, a portion of the valve body 102 engages the valve support surface 104 to restrict fluid movement through the check valve 100.

[0036] Valve support surface 104 may include first support surface 110 and second support surface 112. First support surface 110 and second support surface 112 are configured to be engaged by a portion of valve body 102. In some embodiments, valve support surface 104 may include third support surface 114 engaged by a portion of valve body 102.

[0037] The valve body 102 may include a valve diaphragm 118 having valve segments configured to allow or restrict fluid flow through the valve body 102. The valve diaphragm 118 may be shaped like a disk or other planar shape. An isolation bridge 120 may extend away from the valve diaphragm 118. The isolation bridge 120 may extend away from the valve diaphragm 118 in a direction relative to a valve axis A extending through the center of the valve body 102. For example, the isolation bridge 120 may extend radially outward from the valve diaphragm 118. In some embodiments, the isolation bridge 120 may extend axially away from the valve diaphragm 118. The isolation bridge 120 may extend in any direction parallel to, perpendicular to, and transverse to the valve axis A. Optionally, the valve body 102 may include a mounting rim 122 extending around the valve diaphragm 118. The mounting rim 122 may be positioned relative to the valve diaphragm 118 such that the isolation bridge 120 extends between the mounting rim 122 and the valve diaphragm 118.

[0038] The valve body 102 can have a first end portion 124 and a second end portion 126. When the valve body 102 is coupled to a fluid passage (e.g., a fluid passage 130 extending through the housing 106), the first and second end portions of the valve body 102 can be oriented relative to the fluid passage 130. The valve body 102 can be oriented with the fluid passage 130 to define an upstream portion 132 of the fluid passage adjacent to the first end portion 124 of the valve body and a downstream portion 134 of the fluid passage adjacent to the second end portion 126 of the valve body. The first end portion 124 of the valve body (e.g., the upstream side) can be fluidically engaged by fluid in the upstream portion 132 of the fluid passage, and the second end portion 126 of the valve body (e.g., the downstream side) can be fluidically engaged by fluid in the downstream portion 134 of the fluid passage. Furthermore, either the first and second end portions 124, 126 of the valve body can be fluidically engaged by return flow in the fluid passage 130.

[0039] Alternatively, valve body 102 can be oriented with fluid passage 130 such that first end portion 124 and second end portion 126 can be engaged by either upstream or downstream fluid flow. For example, valve body 102 can be coupled with a fluid passage in which fluid flow can change direction.

[0040] refer to Figure 1 and Figure 2 , valve body 102 is oriented adjacent valve support surface 104 with first end portion 124 facing valve support surface 104. Valve body 102 is positioned so that valve diaphragm 118 is aligned with first support surface 110 and isolation bridge 120 is aligned with second support surface 112. Mounting rim 122 is positioned to align with retention features of valve housing 106 and / or valve support surface 104.

[0041] Figure 1The valve body 102 is shown in a closed or neutral position. In the closed position, the valve body 102 resists fluid movement through the check valve 100. Additionally, in the closed position, a portion of the valve body 102 can be spaced apart from the valve support surface 104. For example, the valve diaphragm 118 can be spaced apart from the first support surface 110, and the isolation bridge 120 can be spaced apart from the second support surface 112. Alternatively, the isolation bridge 120 can be spaced apart from the third support surface 114.

[0042] When the valve body 102 is moved to the open position, the valve segments can allow fluid to move through the valve body 102. In the open position, fluid can move through the valve body 102 from the upstream portion 132 of the fluid path to the downstream portion 134 of the fluid path. The valve body 102 can be moved to the open position by a positive pressure acting on the first end portion 124 of the valve body relative to the second end portion 126 of the valve body or a negative pressure acting on the second end portion 126 of the valve body relative to the first end portion 124 of the valve body.

[0043] When valve body 102 moves to the open position, valve body 102 or a portion thereof can move relative to valve support surface 104. For example, a portion of valve diaphragm 118 can move away from first support surface 110 and can allow fluid to flow through the valve body. A portion of isolation bridge 120 can move away from second support surface 112. In some embodiments of the present disclosure, when valve body 102 moves toward the open position, another portion of isolation bridge 120 can move toward third support surface 114.

[0044] In some cases, positive pressure acting on second end portion 126 relative to first end portion 124 or reverse flow through downstream portion 134 of fluid passageway causes valve body 102 to move toward the closed position. Pressure acting on valve body 102 can cause portions of valve body 102 to move relative to valve support surface 104. For example, reverse flow of fluid engaging second end portion 126 can cause a portion of valve body 102 to move toward first support surface 110. In some embodiments, valve diaphragm 118 moves toward first support surface 110, and isolation bridge 120 moves toward second support surface 112. In some embodiments of the present disclosure, a portion of isolation bridge 120 moves away from third support surface 114.

[0045] The check valve 100 can have a valve support surface positioned on either the upstream portion 132 or the downstream portion 134 of the fluid passageway. In some embodiments of the present disclosure, the valve body 102 can be positioned such that the valve axis A is perpendicular or transverse to the direction of flow through the valve body 102. In some embodiments, a pre-filter or molded filtering feature can be fluidly coupled to the check valve 100 and the fluid passageway. For example, the pre-filter can be positioned upstream or downstream in the passageway relative to the check valve 100.

[0046] Figure 2-Figure 3 An embodiment of a housing 106 for a check valve is shown. The housing 106 can include an upstream valve housing 140 and a downstream valve housing 170. The upstream valve housing 140 and the downstream valve housing 170 are coupled together to direct fluid through the check valve 100. Furthermore, the valve body 102 can be coupled to either the upstream valve housing 140 or the downstream valve housing 170 to retain the valve body 102 with the check valve 100 and prevent the valve mounting rim 122 from moving relative to a portion of the housing 106. In some embodiments of the present disclosure, the check valve can include a unitary or single-piece housing, or a housing having one or more parts coupled or formed together.

[0047] The upstream valve housing 140 is formed as a body having an end portion 142 and defining a fluid passage 130. The fluid passage may include an upstream portion 132 of the passage extending through the end portion 142. The upstream portion 132 of the passage defines an upstream housing axis B. Fluid moving through the upstream portion 132 of the passage is directed toward or away from the upstream housing end 142.

[0048] The upstream valve housing 140 includes the valve support surface 104, or a portion thereof. The valve support surface 104 is defined by an end portion 142 of the upstream valve housing 140. The valve support surface 104 includes an annular channel 144 extending into the upstream valve housing 140. The annular channel 144 can be shaped as a ring extending about the upstream valve housing axis B into the housing end 142. The channel 144 includes an inner wall 146 located proximate to or nearest the upstream housing axis B. An outer wall 148 is spaced apart from the inner wall 146 and extends radially outwardly away from the upstream housing axis B. A bottom surface 150 of the channel extends between the inner wall 146 and the outer wall 148 and forms the second support surface 112. In some embodiments, the inner wall 146 forms the third support surface 114.

[0049] The annular channel 144 can have a cross-sectional shape, wherein the inner wall 146 and the outer wall 148 can each define a corresponding plane. The plane of the outer wall 148 extends transversely to the plane of the inner wall 146. The cross-sectional shape of the channel 144 can define a cross-sectional width that tapers away from the valve support surface 104. The cross-sectional shape can be any regular or irregular shape, including, for example, square, trapezoidal, and circular. In some embodiments, the annular channel 144 can include convex and / or concave surfaces.

[0050] The bottom surface 150 of the annular channel 144 defines a length L1 extending between the inner wall 146 and the outer wall 148 ( Figure 7 ). Length L1 can be at least about 0.02 inches and / or less than or equal to about 0.5 inches. Furthermore, length L1 can be between about 0.04 inches and about 0.1 inches. In some embodiments of the present disclosure, length L1 is any length greater than the cross-sectional width of isolation bridge 120.

[0051] A portion of the upstream housing end 142, radially inward from the annular channel 144, defines a support hub 152 that forms the first support surface 110. The support hub 152 provides a surface for the valve body 102 to engage and prevent undesired opening of the valve body 102. For example, when downstream fluid moves toward the valve body 102, such as during backflow, a portion of the valve body may engage the support hub 152 to prevent the valve body from opening.

[0052] The first support surface 110 defines a plane that is aligned with the outer surface of the upstream casing end 142. In some embodiments of the present disclosure, the first support surface 110 can be offset from the upstream casing end 142 along the upstream casing axis B. In some aspects of the present disclosure, either the support hub 152 and the first support surface 110 can include a convex and / or concave surface.

[0053] The support hub 152 includes an outer side surface defined by the inner wall 146. The outer side surface of the support hub 152 may have a cross-sectional length L2 extending between opposite sides of the inner wall 146. The length L2 ( Figure 7 ) can be at least about 0.1 inches and / or less than or equal to about 1.0 inches. In addition, length L2 can also be between about 0.2 inches and about 0.4 inches.

[0054] The upstream portion 132 of the passage extends through the upstream housing end 142 to allow fluid to move toward or away from the valve support surface 104. The upstream portion 132 of the passage includes a passage 154 extending through the support hub 152. The passage 154 is oriented to extend through the first support surface 110.

[0055] The passages 154 form longitudinal axes that are aligned relative to each other and relative to the upstream housing axis B. For example, the longitudinal axis of each passage 154 is aligned parallel to each other and to the upstream housing axis B. In some embodiments, the passages 154 are spaced about the upstream housing axis B and extend through the support hub 152 .

[0056] The passage 154 includes an arcuate cross-sectional profile. However, in some embodiments, the passage 154 can include any cross-sectional profile, including circular or square. In some aspects, the passage 154 extends through the upstream valve housing 140 with a longitudinal axis that is transverse to the axis B. In yet another embodiment, the passage 154 extends through another portion of the upstream valve housing 140. For example, the passage 154 can extend through any of the first support surface 110, the inner wall 146, the outer wall 148, and the third support surface 114.

[0057] A portion of upstream housing end 142 radially outward from annular channel 144 forms an annular first valve retaining surface 158. First valve retaining surface 158 is configured to engage a portion of valve body 102 to resist movement of that portion of the valve body relative to upstream valve housing 140.

[0058] The first valve retaining surface 158 can be shaped as a flat surface defining a plane. The plane of the first valve retaining surface 158 coincides with the plane defined by the upstream housing end 142. In some embodiments, the plane of the first valve retaining surface 158 can be parallel to or transverse to the upstream housing end 142. In some aspects of the present disclosure, the first valve retaining surface 158 can include a convex and / or concave surface.

[0059] When valve body 102 is coupled to housing 106, mounting rim 122 of the valve body engages first valve retaining surface 158. Mounting rim 122 is axially compressed between first valve retaining surface 158 and another portion of housing 106, such as a valve retaining surface of downstream valve housing 170.

[0060] Optionally, the housing 106 may include an annular valve retaining wall 160 . The valve retaining wall 160 is configured to engage a portion of the mounting rim 122 to limit movement of the mounting rim 122 relative to the housing 106 .

[0061] The valve retaining wall 160 is positioned radially outward relative to the first valve retaining surface 110 and the second support surface 112. The valve retaining wall 160 can extend away from the first valve retaining surface 158. The valve retaining wall 160 can have an inner surface 162 facing the upstream housing axis B. The inner surface 162 of the valve retaining wall 160 includes a cross-sectional length that is less than the cross-sectional length defined by the outer surface of the mounting rim 122.

[0062] When valve body 102 is coupled to housing 106, the outer surface of mounting rim 122 engages the inner surface of valve retaining wall 160. Because the cross-sectional length of valve retaining wall inner surface 162 is less than the length defined by the outer surface of mounting rim 122, mounting rim 122 is compressed radially inward.

[0063] In some embodiments, valve retaining wall 160 may extend from either the upstream valve housing or the downstream valve housing 170. In yet another embodiment, either annular valve retaining surface 158 or valve retaining wall 160 may be formed by a channel or recess of housing 106. In yet another embodiment, valve retaining wall 160 may be any of a series of continuous or discontinuous protrusions and / or recesses.

[0064] In some embodiments, the valve support surface 104 is coupled to either the upstream valve housing 140 or the downstream valve housing 170. In some aspects of the present disclosure, either the upstream valve housing 140 or the downstream valve housing 170 includes the valve support surface 104. For example, the check valve 100 may have an upstream valve support surface for resisting movement of the valve body toward the upstream housing 140 and a downstream valve support surface for resisting movement of the valve body toward the downstream housing 170.

[0065] The downstream valve housing 170 is formed as a body having an end portion 172 and a fluid passage 130. The fluid passage may include a downstream portion 134 of the passage. The downstream portion 134 of the passage extends through the end portion 172, thereby defining an upstream housing axis C. Fluid moving through the downstream portion 134 of the passage is directed toward or away from the downstream housing end 172.

[0066] refer to Figure 2 and Figure 4 , the end portion 172 forms a second annular valve retaining surface 174 that is configured to engage a portion of the valve body 102. The downstream portion 134 of the passageway extends through the end portion 172, thereby defining a downstream housing axis C.

[0067] The downstream portion 134 of the passageway includes a channel 178 extending through the end portion 172. The channel 178 is oriented to extend through the second annular valve retaining surface 174. In some embodiments, the downstream portion 134 of the passageway forms a plurality of channels extending through the end portion 172. The channel 178 includes a length extending from the end portion 172 into the downstream valve housing 170. The cross-sectional width of the channel 178 tapers away from the second annular valve retaining surface 174.

[0068] In some embodiments, the portion of the passageway 178 distal to the second annular valve retaining surface 174 includes an annular ridge 180 extending into the downstream portion 134 of the passageway. Annular ridge 180 includes an inner surface defining a passageway having a cross-sectional length or diameter. Annular ridge 180 can be configured to be engaged by a pipe inserted into the downstream portion 134 of the passageway. Thus, the cross-sectional length of the passageway through annular ridge 180 is less than the cross-sectional length of the pipe configured to be inserted into the check valve 100. In some embodiments, the diameter of the passageway through annular ridge 180 is configured to resist or limit the rate at which fluid flows through the downstream housing 170.

[0069] Second annular valve retaining surface 174 includes compression ridge 176 configured to direct force toward valve body mounting rim 122. Compression ridge 176 extends from second annular valve retaining surface 174 to engage a portion of mounting rim 122, thereby limiting movement of mounting rim 122 relative to housing 106.

[0070] The compression ridge 176 is shaped as a ridge that extends about the downstream housing axis C and projects away from the second annular valve retaining surface 174. The compression ridge 176 is positioned so that when the downstream valve housing 170 is coupled to the upstream valve housing 140, the compression ridge 176 extends from the second annular valve retaining surface 174 toward the annular first valve retaining surface 158.

[0071] The compression ridge 176 includes an outer surface that faces away from the downstream housing axis C. The outer surface of the compression ridge 176 defines a cross-sectional length that is less than the cross-sectional length of the inner surface 162 of the valve retaining wall. Thus, when the upstream valve housing 140 is coupled to the downstream housing 170, the compression ridge 176 is positioned radially inward from the valve retaining wall 160.

[0072] In some embodiments of the present disclosure, compression ridge 176 may be a protrusion or a series of protrusions extending from second annular valve retaining surface 174. In some embodiments, compression ridge 176 may be either a convex or concave portion of second annular valve retaining surface 174 and / or valve support surface 104.

[0073] The housing 106 or any portion thereof can comprise a material configured to resist deformation during the intended use of the check valve 100. For example, either the upstream housing 140 or the downstream housing 170 can be rigid relative to the valve body 102. The housing 106 can be more rigid than the valve body 102 such that the housing 106 resists changing shape or size when the valve body 102 is urged against the housing 106. In some embodiments, the material of the valve support surface 104 is configured to resist deformation during the intended use of the check valve 100. For example, the material of the valve support surface 104 can be rigid relative to the valve body 102.

[0074] The material of housing 106 and / or valve support surface 104 can be any one of plastic, metal, glass, rubber, composite material and any combination thereof. In some embodiments, the material can include any one of polycarbonate, polyoxymethylene, acrylonitrile butadiene styrene, acrylic acid and copolyester.

[0075] refer to Figures 5A-6 , shows a valve body 102 of a check valve. The valve body 102 is configured to form a diaphragm between portions of a fluid passage 130. Additionally, the valve body 102 can resist movement of fluid through the check valve body 102, and the valve can move to allow fluid to move through the check valve body 102.

[0076] The valve body 102 can have a first end portion 124 and a second end portion 126. The valve body 102 includes a valve diaphragm 118, a mounting rim 122, and an isolation bridge 120. Although the valve body 102 is shown as having a circular shape, the valve body 102 and / or a portion thereof can be any regular or irregular shape, including any of a circle, a square, a rectangle, and an oval.

[0077] The valve diaphragm 118 is configured to allow or restrict fluid flow through the valve body 102. The valve diaphragm 118 includes a valve segment 180 that can resist fluid flow through the valve body 102 and can allow fluid flow through the valve body 102. The valve segment 180 can be configured to move to resist fluid flow through the valve body 102 (e.g., a normally open valve) or can move to allow fluid flow through the valve body 102 (e.g., a normally closed valve).

[0078] The valve segments 180 are formed by slits 182 extending through the valve diaphragm 118. The slits 182 divide the valve diaphragm 118 into one or more valve segments 180. Each valve segment may extend from an outer portion of the valve diaphragm 118 toward an inner portion of the valve diaphragm 118 relative to the central valve axis D of the valve body 102.

[0079] The valve segment 180 can have a cross-sectional height that is transverse to the length of the valve body between the inner and outer portions of the valve diaphragm 118. The cross-sectional height of the valve segment 180 tapers toward the valve axis D. In some embodiments, the cross-sectional height of the valve segment 180 is constant along the length of the valve segment 180. In some embodiments, the cross-sectional height of the valve segment 180 tapers away from the valve axis D.

[0080] The slit 182 extends through the valve diaphragm 118 between the outer side surfaces of the valve diaphragm 118. For example, the slit 182 can extend through the valve diaphragm 118 between the first end portion 124 and the second end portion 126 of the valve body 102 and from the outer portion of the valve diaphragm 118 toward the inner portion of the valve diaphragm 118.

[0081] The valve diaphragm 118 may include more than one slit. For example, two slits 182 may intersect to form more than one valve segment 180. In some embodiments, three slits extend radially outward relative to the valve axis D. The slits 182 may be spaced apart to form valve segments 182 having substantially equal lengths and widths.

[0082] The slits 182 extend through the valve body 102 relative to the valve axis D of the valve body 102. More than one slit 182 may intersect at a point that coincides with the valve axis D. However, it should be understood that the slits 182 may intersect at a point that is radially offset from the valve axis D.

[0083] The slits 182 may form a straight line, thereby defining a plane extending through the valve diaphragm 118. However, in some embodiments, any portion of the slits 182 may form any of a straight line, a curved line, and a line having alternating directions.

[0084] In some embodiments, the valve body 102 includes two or more radial slits that form two or more petal-shaped valve segments that can open and close together. Because the maximum deflection of the valve segments 182 can occur at the center of the valve body (e.g., valve axis D), the cumulative opening from the sum of the valve segments 182 can allow most particles or debris to move through the valve body 102 without becoming trapped or stuck in the valve body 102.

[0085] In some aspects of the present disclosure, the valve body 102 can include any type of valve segment to allow or resist fluid flow through the valve body 102. For example, the valve body 102 can include hinged plates or multiple layers configured to move to resist or allow fluid flow. In another embodiment, the valve body can be configured to move when engaged by fluid flow, wherein movement of the valve body opens and / or closes a fluid passageway. In yet another embodiment, the valve body can move to trigger another portion of the check valve, thereby opening or closing a fluid passageway.

[0086] In some embodiments, valve body 102 includes grooves 184 extending along the surface of valve diaphragm 118 to increase the flexibility and range of motion of valve segment 180. In some embodiments, grooves 184 can reduce or increase the cracking pressure of valve body 102 relative to a valve body without grooves.

[0087] In some cases, the groove 184 extends along an outer portion of the valve diaphragm 118. The groove can extend into either the first end portion 124 or the second end portion 126 of the valve body 102. In some embodiments, the groove 184 can be formed as either a concave portion of the valve diaphragm 118 or a channel extending through the diaphragm 118. In some embodiments, the valve diaphragm 118 includes a protrusion extending from either the first end portion 124 or the second end portion 126 of the valve body 102 to reduce the flexibility or range of movement of the valve segment 180.

[0088] The outer portion of the valve diaphragm 118 may include a protrusion that is configured to limit movement of the valve body 102 relative to an adjacent structure, such as the housing 106. The protrusion extends from the second end portion 126 of the valve body 102 away from the valve diaphragm 118. The protrusion is shaped as an annular ridge 186 that extends along the outer portion of the valve diaphragm 118 and about the valve axis D.

[0089] The annular ridge 186 extends a length L3 from the valve diaphragm 118. The length L3 can be at least about 0.001 inches and / or less than or equal to about 0.1 inches. Additionally, the length L3 can be between about 0.004 inches and about 0.04 inches.

[0090] The annular ridge 186 may include a cutout extending from the outer surface into the annular ridge 186. The cutout is a scalloped cutout extending from the outermost surface of the annular ridge 186 toward the valve diaphragm 118. However, the cutout may be any of a notch, a channel, and a groove extending into the annular ridge 186.

[0091] In some embodiments, the annular ridge 186 can define an intermittent protrusion that can extend away from the valve diaphragm 118. In some aspects, the valve body 102 can include a concentric protrusion or annular ridge. In yet another embodiment, the check valve 100 can include a protrusion extending from the housing toward the valve body 102 to resist movement of the valve body 102. In some embodiments, the annular ridge 186 extends from either the inner portion or the outer portion of the valve diaphragm 118.

[0092] In operation, the annular ridge 186 engages the downstream housing 170 to resist movement of the valve body 102. For example, when the valve body is in the open position, pressure acting on the upstream or first end portion 124 of the valve body causes the valve diaphragm 118 to move toward the downstream housing 170. To prevent undesirable contact of the valve diaphragm 118 or valve segment 180 on the downstream housing 170, the ridge 186 is configured to contact the downstream housing 170 before a portion of the valve diaphragm 118.

[0093] Furthermore, limiting the movement of the valve body 102 can limit the distance that the valve segment 180 can open. In some cases, the movement of the valve body 102 is limited to the degree necessary to open the valve body 102 to achieve the minimum desired flow rate (ridge 186). Thus, external wear of the check valve 100 can be avoided.

[0094] The isolating bridge 120 of the valve body is configured to resist the transmission of forces radially inward relative to the isolating bridge 120. For example, when the valve body 102 is coupled to the housing 108, radial forces and / or axial forces may be directed from the mounting rim 122 toward the valve diaphragm 118. The isolating bridge 120 resists the transmission of radial and axial forces toward the valve diaphragm 118, thereby preventing the valve segments 180 from being pushed against each other and deforming or bulging, which could form gaps or passages through the valve diaphragm 118.

[0095] The isolation bridge 120 is annular in shape and extends between the mounting rim 122 and the valve diaphragm 118. The isolation bridge 120 may be an annular ring having an arcuate cross-sectional profile.

[0096] Isolation bridge 120 includes a first bridge wall 188 extending from valve diaphragm 118 in a first direction and a second bridge wall 189 extending from first bridge wall 188 in a second direction transverse to the first direction. Second bridge wall 189 extends from first bridge wall 188 to mounting rim 122. The intersection of the first and second bridge walls can form a top end 191 of the isolation bridge. In some embodiments, the walls of isolation bridge 120 extend radially and axially outward from valve diaphragm 118.

[0097] The cross-sectional profile of the isolation bridge 120 defines a width configured to prevent unintended contact between the isolation bridge and the support hub 152 that could cause the valve segments 180 to move apart and allow flow through the valve body 102 .

[0098] To prevent contact between the isolation bridge 120 and the support hub 152, the width of the isolation bridge 120 is smaller than the cross-sectional profile of the annular channel 144. For example, the width of the isolation bridge 120 is smaller than the length L1 of the bottom surface 150 of the annular channel 144 to prevent radially inward forces from causing engagement of the isolation bridge 120 with the support hub 152, at least when the valve body 102 is in the neutral or closed position.

[0099] Isolation bridge 120 may optionally include a cutout extending from the outer surface into the bridge wall. The cutout of isolation bridge 120 may help reduce the transmission of radial and axial forces toward valve diaphragm 118. Additionally, the cutout may reduce the rigidity of isolation bridge 120 relative to the rest of valve body 102.

[0100] The cutout is a scalloped cutout extending from the outer surface at the top end 191 toward the valve diaphragm 118. However, the cutout may be any of a recess, a channel, and a groove extending into the isolation bridge 120. Because the cutout forms the outer surface of the isolation bridge 120 with interruptions, less surface of the isolation bridge 120 engages the second support surface 114.

[0101] In some embodiments, the intermittent protrusion can extend away from the isolation bridge 120. In some aspects, the check valve 100 can include a protrusion extending from the housing or second support surface 114 toward the isolation bridge 120. In some embodiments, the cutout extends in a direction from either the first end portion 124 or the second end portion 126 of the valve body into the isolation bridge 120.

[0102] The mounting rim 122 is configured to engage with the housing or other retaining features to position the valve body 102 in the check valve 100. Furthermore, the mounting rim 122 is coupled to the housing such that a force is directed to the mounting rim 122 and moves toward the valve diaphragm 118 to maintain the valve segment 180 in the closed position. Thus, the mounting rim 122 can be compressed between surfaces of the housing 106, causing either a radial compressive force or a circumferential compressive force to be directed to the mounting rim 122.

[0103] The mounting rim 122 is annular in shape and extends radially outward from the isolation bridge 120. The mounting rim 122 may be annular in shape with a cross-sectional profile that may be any regular or irregular shape, including any of a circle, square, rectangle, and oval.

[0104] The cross-sectional profile shape also defines a radially inner surface and a radially outer surface of the mounting rim 122. The inner surface faces radially inwardly toward the valve diaphragm 118.

[0105] In some embodiments, the inner surface includes a circumferential groove 190. The circumferential groove 190 extends along the circumference of the inner surface of the mounting rim 122. The circumferential groove 190 can help reduce the transmission of radial and axial forces toward the valve diaphragm 118. In some aspects, the circumferential groove 190 can increase ease and efficiency of manufacturing by providing a location for the valve body 102 to engage and remain secured to a mold forming the valve body 102.

[0106] In some embodiments, a protrusion extends from the outer surface of the mounting rim 122. The protrusion can extend radially outward from the outer surface of the mounting rim 122. The plurality of intermittent radially extending protrusions can limit the transmission of radial compression to the valve body 102 over periodic segments. In some embodiments, the protrusion can be formed by a scalloped cut extending into the mounting rim 122. In some aspects, the scalloped cut can extend in a direction from the first end portion 124 and / or the second end portion 126 of the valve body to the mounting rim 122.

[0107] The mounting rim 122 may optionally include a protrusion that extends in a direction away from the first end portion 124 and / or the second end portion 126 of the valve body. For example, when the valve body 102 is coupled to the housing 106, the protrusion may extend toward either the first annular valve retaining surface 158 or the second annular valve retaining surface 174.

[0108] The valve body 102 can comprise any flexible or resilient material and can include any of plastic, rubber, composite materials, and any combination thereof. The material of the valve body 102 can include any thermoset material (such as polyisoprene) and thermoplastic material. In some embodiments of the present disclosure, the valve body comprises a material having a Shore hardness rating of at least about 20 and / or less than or equal to about 80.

[0109] In some embodiments, one or more portions of the valve body 102 can comprise a different material or material properties than another portion. For example, the valve diaphragm 118 or any portion thereof can comprise a material configured to elastically deform during the intended use of the check valve 100. In some aspects, the valve diaphragm 118 can be more flexible relative to the isolation bridge 120 and the mounting rim 122, such that the valve diaphragm 118 elastically moves ahead of another portion of the valve body 102.

[0110] Figure 7 1. The valve body 102 is shown in a closed or neutral position. The valve body 102 is positioned adjacent the valve support surface 104 with the first end portion 124 of the valve body facing the valve support surface 104. The valve body 102 is positioned with the valve diaphragm 118 adjacent the first support surface 110 and the isolation bridge 120 adjacent the second support surface 112.

[0111] The mounting rim 122 is positioned between the annular first valve retaining surface 158 and the second annular valve retaining surface 174 and radially inward relative to the valve retaining wall 160. The first valve retaining surface 158 and the second valve retaining surface 174 direct an axial compressive force (arrow A) toward the mounting rim 122. The valve retaining wall 160 directs a radial compressive force (arrow R) toward the mounting rim 122.

[0112] Isolation bridge 120 reduces the axial and / or radial compressive forces transmitted inwardly from mounting rim 122 toward valve diaphragm 118. For example, if mounting rim 122 is compressed radially inwardly by approximately 0.004 inches, isolation bridge 120 may cause valve diaphragm 118 or other portions of valve 102 to compress radially inwardly by approximately 0.0005 inches. The reduction in radial compression directed toward valve diaphragm 118 allows valve segments 180 to engage one another to seal or close the fluid passage through valve body 102, but prevents buckling or bulging of valve segments 180 and the formation of gaps between valve segments 180.

[0113] The valve body 102 and the valve support surface 104 are configured such that a portion of the valve body 102 is spaced apart from a portion of the valve support surface 104. The spacing between the portion of the valve body 102 and the portion of the valve support surface 104 ensures that the check valve operates as intended.

[0114] First support surface 110 is spaced a distance L4 from the nearest surface of valve diaphragm 118, and second support surface 112 is spaced a distance L5 from the nearest surface of annular isolation bridge 120. To prevent valve diaphragm 118 from engaging first support surface 110, distance L4 is greater than distance L5. Distance L5 may be at least approximately 0.001 inches and / or less than or equal to approximately 0.1 inches. Furthermore, distance L5 may be between approximately 0.002 inches and approximately 0.04 inches. In some embodiments of the present disclosure, distance L5 is zero inches.

[0115] In operation, as valve body 102 moves toward valve support surface 104 , isolation bridge 120 engages second support surface 112 before valve diaphragm 118 can engage first support surface 110 .

[0116] Third support surface 114 is spaced apart from the nearest surface of isolation bridge 120 by a distance L6. Distance L6 may be at least about 0.001 inches and / or less than or equal to about 0.1 inches. Distance L6 may also be between about 0.002 inches and about 0.02 inches.

[0117] The space between third support surface 114 and isolation bridge 120 may allow valve body 102 to receive either radial force and axial force, but resist engagement of isolation bridge 120 with third support surface 114 .

[0118] The annular ridge 186 is spaced apart from the nearest surface of the downstream housing 170 by a distance L7. The distance L7 may be at least about 0.001 inches and / or less than or equal to about 0.1 inches. Furthermore, the distance L7 may be between about 0.004 inches and about 0.04 inches.

[0119] In operation, when the valve body 102 moves away from the valve seat surface 104 , the distance L7 may allow the valve diaphragm 118 to move toward the downstream housing 170 and allow the valve body to open, but the annular ridge 186 may engage the downstream housing 170 to resist further movement of the valve body 102 .

[0120] refer to Figure 8A , the check valve 100 is shown in an open position with downstream fluid flow (D arrow) moving through the valve body 102. In the open position, the downstream fluid flow D can move from the upstream portion 132 of the passageway through the passage 154 and the valve body 102 toward the downstream portion 134 of the passageway.

[0121] In the open position, pressure from the fluid engages the first end portion 124 of the valve body 102 and causes at least a portion of the valve body 102 to move away from the valve support surface 104 and toward the downstream housing 170. More specifically, the valve segments 180 are urged toward the downstream housing 170. Portions of the valve segments 180 move relative to each other to form a fluid passage through the valve body 102.

[0122] Pressure engaging the first end portion 124 of the valve body 102 can cause the valve diaphragm 118 to move toward the downstream housing 170. As the valve diaphragm 118 moves toward the downstream housing 170, the distance L7 between the annular ridge 186 and the downstream housing 170 decreases. Optionally, the distance L7 can be configured such that the annular ridge 186 engages the passage 178 when the pressure acting on the first end portion 124 of the valve body exceeds the expected pressure or flow through the valve body 102. In some embodiments, when the annular ridge 186 engages the downstream housing 170, further opening or movement of the valve segment 180 toward the downstream housing 170 is prevented. Optionally, the engagement of the isolation bridge 120 with a support surface (e.g., the third support surface 114) can limit movement of the valve body 102 relative to the valve support surface 104.

[0123] By limiting the movement of the valve body 102 in the open position, damage to the valve can be prevented. For example, fluid flow or pressure may cause the valve body 102 or the valve diaphragm 118 to stretch or deform. Additionally, contact between the valve diaphragm 118 and another portion or structure of the check valve 100 may cause damage or changes in operating characteristics. Limiting the movement of the valve body 102 in the open position prevents damage or undesirable changes in the operation of the valve body 102. In the open position, the valve diaphragm 118 allows fluid to move through the valve body 102 from the upstream portion 132 of the passageway toward the downstream portion 134 of the passageway.

[0124] refer to Figure 8B, the check valve 100 is shown in a closed position with downstream fluid flow (arrow U). The downstream fluid flow U may be caused by a backflow of fluid from the downstream portion 134 of the passageway toward the valve body 102. The downstream fluid flow U may cause pressure to act on the valve body 102, thereby causing any of the valve segment 180, the valve diaphragm 118, and the isolation bridge 120 to move toward the first support surface 104.

[0125] As the valve segments 180 move toward the first support surface 104, the valve segments 180 engage one another to close the fluid passage through the valve body 102. Further movement of the valve diaphragm 118 toward the first support surface 104 can cause the valve diaphragm 118 and / or the valve segments 180 to engage the first support surface 110. The engagement of the valve diaphragm 118 with the first support surface 110 can help maintain the valve diaphragm in a closed position. However, the engagement of the valve diaphragm 118 with the first support surface 110 can also cause the valve to stretch and cause the passage through the valve diaphragm 118 to open, thereby allowing fluid to flow through the valve body 102.

[0126] To prevent opening of valve body 102 or stretching of valve diaphragm 118 in the closed position, a portion of valve body 102 engages valve support surface 104 to resist movement of valve body 102 and prevent damage to valve body 102. More specifically, isolation bridge 120 engages second support surface 112 before valve diaphragm 118 engages first support surface 110. In some embodiments, the engagement of isolation bridge 120 with second support surface 112 prevents an outer portion of valve diaphragm 118 from engaging first support surface 110.

[0127] The engagement of the isolation bridge 120 with the second support surface 112 can prevent pressure from engaging the valve from causing damage or operational changes to the valve diaphragm 118. Damage or operational changes to the valve diaphragm 118 can occur when the engagement of the valve diaphragm 118 with the second support surface 110 causes the valve diaphragm 118 to stretch or deform, thereby creating a fluid passage between the valve segments 180 and allowing fluid flow (e.g., backflow) to move through the valve body 102.

[0128] This subject technology is an explanation of the terms

[0129] For convenience, various examples of various aspects of the present disclosure are described by numbered clauses (1, 2, 3, etc.). These are provided as examples only and do not limit the subject technology. Figure numerals and the identification of the figures are provided below only as examples and for illustrative purposes, and the clauses are not limited by these identifications.

[0130] Item 1 A check valve assembly comprising: a valve support surface having a first support surface and a second support surface, the second support surface being positioned radially outward relative to the first support surface; and a valve body comprising a mounting rim, a valve diaphragm extending radially inward from the mounting rim and having a valve segment defined by a slit, and an annular isolation bridge extending between the mounting rim and the valve diaphragm; wherein a distance from the first support surface to a nearest surface of the valve diaphragm is greater than a distance from the second support surface to a nearest surface of the annular isolation bridge.

[0131] Clause 2. The check valve assembly of Clause 1 , comprising an annular first valve retaining surface and a second annular valve retaining surface, the first valve retaining surface and the second valve retaining surface being positioned radially outward relative to the second support surface.

[0132] Item 3. A check valve assembly according to Item 2, wherein the mounting ring includes a first end surface and a second end surface opposite the first end surface, and wherein the first valve retaining surface engages the first end surface and the second valve retaining surface engages the second end surface to axially compress the mounting edge therebetween.

[0133] Clause 4. The check valve assembly of Clause 2, wherein either one of the first and second valve retaining surfaces includes a compression ridge that extends toward the other of the first and second valve retaining surfaces.

[0134] Clause 5. The check valve assembly of Clause 1, comprising an annular valve retaining wall positioned radially outward relative to the second support surface, wherein the annular valve retaining wall engages an outer surface of the mounting rim to guide the mounting rim radially inward.

[0135] Clause 6. The check valve assembly of Clause 5, wherein the inner surface of the annular valve retaining wall includes a cross-sectional length that is less than the cross-sectional length defined by the outer surface of the mounting rim.

[0136] Clause 7. The check valve assembly of Clause 1, comprising a fluid passage extending through the first support surface.

[0137] Clause 8. The check valve assembly of Clause 1, wherein the valve diaphragm includes an outer portion and an inner portion, and the valve segment extends from the outer portion toward the inner portion.

[0138] Clause 9. The check valve assembly of Clause 8, wherein the valve diaphragm includes an annular groove extending between the outer portion and the inner portion.

[0139] Clause 10. The check valve assembly of Clause 1, wherein the valve diaphragm includes a first end portion and a second end portion, and a protrusion extending away from the second end portion.

[0140] Clause 11. The check valve assembly of clause 10, wherein the protrusion is an annular ridge extending along an outer portion of the valve diaphragm.

[0141] Clause 12. The check valve assembly of Clause 1, wherein the annular isolation bridge comprises an arcuate cross-sectional profile.

[0142] Clause 13. The check valve assembly of Clause 1, wherein the annular isolation bridge includes a first bridge wall extending from the mounting rim in a first direction, and a second bridge wall extending from the first bridge wall in a second direction transverse to the first direction.

[0143] Clause 14. The check valve assembly of clause 13, wherein the second bridge wall extends from the first bridge wall to the valve diaphragm.

[0144] Clause 15. The check valve assembly of Clause 13, wherein a top end of the annular isolation bridge is formed by an intersection of the first bridge wall and the second bridge wall.

[0145] Clause 16. The check valve assembly of Clause 1, wherein the annular isolation bridge includes an outer surface having scalloped cutouts.

[0146] Clause 17. The check valve assembly of Clause 1, wherein the annular isolation bridge includes an outer surface having a protrusion.

[0147] Clause 18. The check valve assembly of Clause 1, wherein the valve support surface comprises an annular channel having a channel wall extending between the first support surface and the bottom surface.

[0148] Clause 19. The check valve assembly of Clause 18, wherein the channel wall defines a third support surface and the bottom surface defines a second support surface.

[0149] Item 20 A method of controlling flow through a check valve assembly, comprising: defining a fluid passage having a valve support surface, wherein the valve support surface includes a first support surface and a second support surface, the second support surface being radially outward relative to the first support surface; positioning a valve body adjacent to the valve support surface, wherein the valve body includes a valve diaphragm and an annular isolation bridge, the valve diaphragm being configured to resist fluid flow through the fluid passage, the valve diaphragm having a valve segment defined by a slit, and the annular isolation bridge extending radially outward from the valve diaphragm; wherein, when the valve body moves toward the valve support surface, the isolation bridge engages the second support surface before the valve diaphragm engages the first support surface.

[0150] Further considerations

[0151] In some embodiments, any one of the clauses herein can depend on any one of the independent clauses or any one of the dependent clauses. In one aspect, any one of the clauses (e.g., dependent clauses or independent clauses) can be combined with any other one or more clauses (e.g., dependent clauses or independent clauses). In one aspect, a claim can include some or all of the words (e.g., steps, operations, means, or parts) narrated in a clause, sentence, phrase, or paragraph. In one aspect, a claim can include some or all of the words narrated in one or more clauses, sentences, phrases, or paragraphs. In one aspect, some of the words in each clause, sentence, phrase, or paragraph can be removed. In one aspect, additional words or elements can be added to a clause, sentence, phrase, or paragraph. In one aspect, the subject technology can be implemented without utilizing some of the parts, elements, functions, or operations described herein. In one aspect, the subject technology can be implemented utilizing additional parts, elements, functions, or operations.

[0152] The foregoing description is provided to enable those skilled in the art to practice the various configurations described herein. Although the subject technology has been described in detail with reference to various drawings and configurations, it should be understood that these are only for illustrative purposes and should not be considered as limiting the scope of the subject technology.

[0153] There may be many other methods to implement the subject technology. The various functions and elements described herein may be divided differently from those shown without departing from the scope of the subject technology. Various modifications to these configurations will be apparent to those skilled in the art, and the general principles defined herein may be applied to other configurations. Therefore, those of ordinary skill in the art may make many changes and modifications to the subject technology without departing from the scope of the subject technology.

[0154] It should be understood that the specific order or hierarchy of steps in the disclosed processes is provided as an illustration of exemplary approaches. It should be understood that the specific order or hierarchy of steps in these processes may be rearranged based on design preferences. Some steps may be performed simultaneously. The accompanying method claims present elements of the various steps in an example order and are not intended to be limited to the specific order or hierarchy presented.

[0155] As used herein, the phrase "at least one of" preceding a list of items (with the terms "and" or "or" separating any items) modifies the list as a whole, rather than each member (i.e., each item) of the list. The phrase "at least one of" does not require selection of at least one of each listed item; rather, the phrase allows for a meaning that includes at least one of any one item, and / or at least one of any combination of items, and / or at least one of each item. For example, the phrase "at least one of A, B, and C" or "at least one of A, B, or C" all mean only A, only B, or only C; any combination of A, B, and C; and / or at least one of A, B, and C.

[0156] As used in this disclosure, terms such as "top," "bottom," "front," "back," etc. should be understood to refer to an arbitrary reference frame, not the ordinary gravitational reference frame. Thus, the top surface, bottom surface, front surface, and back surface may extend upward, downward, diagonally, or horizontally in the gravitational reference frame.

[0157] Additionally, to the extent that the terms "including," "having," etc. are used in the specification or claims, such terms are intended to be inclusive in a manner similar to the term "comprising" as interpreted when used as a transitional word in a claim.

[0158] In one or more aspects, the terms "about," "substantially," and "approximately" may provide an industry-accepted tolerance for their corresponding terms and / or relativity between items.

[0159] The word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0160] Unless otherwise stated, elements referred to in the singular are not intended to mean "one and only one", but rather "one or more". Masculine pronouns (e.g., his) include the feminine and neuter genders (e.g., her and its), and vice versa. The term "some" refers to one or more. Underlined and / or italicized titles and subtitles are used for convenience only, do not limit the subject technology, and are not meant to be linked to the interpretation of the description of the subject technology. All structural and functional equivalents of the elements of the various configurations described throughout this disclosure are known or will become known to those of ordinary skill in the art, are expressly incorporated herein by reference, and are intended to be covered by the subject technology. In addition, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is explicitly recited in the above description.

[0161] Although specific embodiments include many details, these should not be interpreted as limiting the scope of the subject technology, but are merely different examples and aspects of the subject technology. It should be understood that the scope of the subject technology includes other embodiments not discussed in detail above. Without departing from the scope of the present disclosure, various other modifications, changes and variations can be made to the arrangement, operation and details of the method and equipment of the subject technology disclosed herein. Unless otherwise stated, the elements mentioned in the singular are not intended to mean "one and only one", but to mean "one or more". In addition, the device or method does not have to be directed to each problem solved by the different embodiments of the present disclosure in order to be included in the scope of the present disclosure (or to have each advantage that can be realized by the different embodiments of the present disclosure). "Can" and its derivatives used herein should be understood as "possible" or "optional" meaning, rather than affirmative ability.

Claims

1. A check valve assembly, comprising: an upstream valve support surface, a fluid passage extending through the upstream valve support surface, and a channel extending into the upstream valve support surface, the channel having a bottom surface spaced from the upstream valve support surface; as well as a valve body comprising a mounting rim, a valve diaphragm, and an annular isolating bridge extending between the mounting rim and the valve diaphragm, wherein the valve diaphragm includes an upstream facing surface and the annular isolating bridge includes a top end; In which, the distance between the upstream valve support surface and the bottom surface of the groove is smaller than the distance between the upstream facing surface of the valve diaphragm and the top end of the annular isolation bridge, so that the upstream facing surface of the valve diaphragm is spaced apart from the upstream valve support surface when the valve body is in the closed position.

2. The check valve assembly according to claim 1, wherein: The valve diaphragm extends radially inward from the mounting rim.

3. The check valve assembly according to claim 1, wherein: The valve diaphragm includes a slit extending between the upstream and downstream facing surfaces to define a valve segment.

4. The check valve assembly according to claim 1, wherein: The downstream facing surface of the valve diaphragm includes a protrusion extending away from the upstream valve support surface.

5. The check valve assembly according to claim 1, wherein The top end of the annular isolation bridge includes an outer surface with a protrusion.

6. The check valve assembly according to claim 1, wherein: The channel includes an inner wall extending between the upstream valve support surface and the bottom surface, and wherein the inner wall is configured to resist radially inward movement of the annular isolation bridge.

7. The check valve assembly according to claim 1, wherein: The channel includes an outer wall extending between the upstream valve support surface and the bottom surface, and wherein the outer wall is configured to resist radially outward movement of the annular isolation bridge.

8. The check valve assembly of claim 1 , comprising an annular valve retaining wall positioned radially outwardly relative to the channel, wherein The annular valve retaining wall engages an outer surface of the mounting rim to guide the mounting rim radially inwardly.

9. The check valve assembly according to claim 8, wherein: The inner surface of the annular valve retaining wall defines a cross-sectional length that is less than a cross-sectional length defined by the outer surface of the mounting rim.

10. The check valve assembly according to claim 1, wherein As the valve body moves toward the upstream valve support surface, the annular isolation bridge engages a bottom surface of the channel before the valve diaphragm engages the upstream valve support surface.

11. A check valve assembly comprising: an upstream valve support surface comprising a first surface portion having a fluid passage extending therethrough and a second surface portion, the first surface portion being positioned radially outward from the first surface portion and extending around a periphery of the first surface portion, wherein the second surface portion is spaced apart from the first surface portion in an upstream direction; as well as a valve body comprising a mounting rim, a valve diaphragm, and an annular isolating bridge extending between the mounting rim and the valve diaphragm, wherein the valve diaphragm includes an upstream facing surface, and the annular isolating bridge includes an upstream facing surface spaced apart from the valve diaphragm in an upstream direction; The distance between the first surface portion and the second surface portion is smaller than the distance between the upstream facing surface of the valve diaphragm and the upstream facing surface of the annular isolation bridge, so that the upstream facing surface of the valve diaphragm is spaced apart from the first surface portion when the valve body is in the closed position.

12. The check valve assembly according to claim 11, wherein The valve diaphragm extends radially inward from the mounting rim.

13. The check valve assembly according to claim 11, wherein: The valve diaphragm includes a slit extending between the upstream and downstream facing surfaces to define a valve segment.

14. The check valve assembly of claim 11 , comprising an annular valve retaining wall positioned radially outwardly relative to the second surface portion, wherein: The annular valve retaining wall engages an outer surface of the mounting rim to guide the mounting rim radially inwardly.

15. The check valve assembly according to claim 14, wherein: The inner surface of the annular valve retaining wall defines a cross-sectional length that is less than a cross-sectional length defined by the outer surface of the mounting rim.

16. The check valve assembly according to claim 11, wherein The downstream facing surface of the valve diaphragm includes a protrusion extending away from the upstream valve support surface.

17. The check valve assembly according to claim 11, wherein: The top end of the annular isolation bridge includes an outer surface with a protrusion.

18. The check valve assembly according to claim 11, wherein The upstream valve support surface includes an inner wall extending between the first surface portion and the second surface portion, and the inner wall is configured to resist radially inward movement of the annular isolation bridge.

19. The check valve assembly according to claim 11, wherein: The upstream valve support surface includes an outer wall extending to the second surface portion, and the outer wall is configured to resist radially outward movement of the annular isolation bridge.

20. The check valve assembly of claim 11, wherein: The fluid passage is spaced from a central axis passing through the first surface portion.

21. The check valve assembly of claim 11, wherein: When the valve body moves toward the upstream valve support surface, the annular isolation bridge engages the second surface portion before the valve diaphragm engages the first surface portion.

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