US3618632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve
Assignee: HERSHEY METAL PRODUCTS Inc
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Filing: 1969-07-31
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Granted: 1971-11-09
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Expires: 1989-07-31
Abstract
Abstract A fluid check valve having a hollow elongated self-supporting nipple supported in a path of fluid flow and made from a resilient deformable material. A slit through the closed upstream end of the nipple divides it into adjacent sections which are laterally displaced from each other to provide a path of fluid flow therebetween when the fluid pressure on the downstream side of the nipple exceeds the fluid pressure on the upstream side thereof. Under the influence of back pressure the sections resiliently press against each other to prevent reverse fluid flow therebetween. The nipple has an integral part which supports it in a fixed position in an associated conduit member and also forms a seal between the latter member and another conduit member connected thereto. A rigid nipple insert may be provided to prevent inward collapse or deformation of the nipple due to fluid back pressure.
Inventors
- 👤 Frederick F Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:37
CPC Classifications
B; B67; B67D; B67D1/00; B67D1/08; B67D1/0829; B67D1/04; F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; F16K15/147; B67D2001/0475; B67D2001/0487; B67D2001/0493; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7854; Y10T137/7857; Y10T137/7879; Y10T137/788; Y10T137/7882
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
267 words
A unitary check valve element formed from elastomeric material and for assembly with a pair of conduit members adapted for teLescopic connection to form a continuous fluid passageway, said valve element having an axially elongated body portion of nonuniform wall thickness adapted to be disposed in the passageway and including an inlet end and an outlet end, said valve element including an annular wall integrally connected to said body portion near said inlet end and coaxially extending for a substantial distance in the direction of said outlet end, said annular wall surrounding at least a part of said body portion and spaced radially outwardly therefrom and adapted for surrounding engagement with an associated end portion of the outer peripheral surface of one of the members when said valve element is assembled therewith, means associated with said inlet end and adapted for abutting engagement with the end portion of the one conduit member for positioning said body portion in a predetermined location relative to the one conduit member when the valve element is assembled therewith, said inlet end having an axial extend beyond the end portion of the one conduit member substantially greater than the thickness of said annular wall and comprising means for retaining said body portion in said predetermined location when said annular wall and the associated end portion of the one member are forcibly inserted into an end portion of the other of the conduit members to effect telescopic connection between the members whereby said body portion is maintained in said predetermined location and the connection between the members is sealed by the annular wall.
Claim 2
Dependent Claim
267 words
A unitary check valve element formed from elastomeric material and for assembly with a pair of conduit members adapted for teLescopic connection to form a continuous fluid passageway, said valve element having an axially elongated body portion of nonuniform wall thickness adapted to be disposed in the passageway and including an inlet end and an outlet end, said valve element including an annular wall integrally connected to said body portion near said inlet end and coaxially extending for a substantial distance in the direction of said outlet end, said annular wall surrounding at least a part of said body portion and spaced radially outwardly therefrom and adapted for surrounding engagement with an associated end portion of the outer peripheral surface of one of the members when said valve element is assembled therewith, means associated with said inlet end and adapted for abutting engagement with the end portion of the one conduit member for positioning said body portion in a predetermined location relative to the one conduit member when the valve element is assembled therewith, said inlet end having an axial extend beyond the end portion of the one conduit member substantially greater than the thickness of said annular wall and comprising means for retaining said body portion in said predetermined location when said annular wall and the associated end portion of the one member are forcibly inserted into an end portion of the other of the conduit members to effect telescopic connection between the members whereby said body portion is maintained in said predetermined location and the connection between the members is sealed by the annular wall.
Claim 3
Dependent Claim
45 words
A unitary check valve as set forth in claim 1 wherein the one conduit member has an inlet opening at one end thereof surrounded by a generally radially disposed bearing surface and said positioning means comprises an annular abutment surface defined by said inlet end.
Claim 4
Dependent Claim
24 words
A unitary check valve as set forth in claim 1 wherein said inlet end has a generally conical configuration converging from said annular wall.
Claim 5
Dependent Claim
157 words
A unitary check valve element as set forth in claim 1 wherein said body portion has a sidewall and includes an end wall at said outlet end, said sidewall and said end wall defining an axially elongated cavity open at said inlet end, and said body portion has a slit disposed in one plane and extending in a generally axial direction though said end wall and through portions of said sidewall on generally opposite sides of said cavity, said slit dividing said end wall and at least a portion of said sidewall into adjacent mating sections movable in generally radially opposite directions relative to each other between a closed position wherein said sections engage each other to close said slit and an open position wherein said sections are generally radially displaced from each other to define an aperture therebetween through which fluid is constrained to pass in flowing from said inlet end to and through said cavity.
Claim 6
Dependent Claim
19 words
A unitary check valve element as set forth in claim 1 wherein said one plane is an axial plane.
Claim 7
Dependent Claim
38 words
A unitary check valve element as set forth in claim 4 wherein said sidewall portion is generally cylindrical, and said end wall is substantially thicker than said sidewall portion and generally arch-shaped as viewed in an axial plane.
Claim 8
Dependent Claim
32 words
A unitary check valve as set forth in claim 6 wherein said sidewall portion has a diameter substantially smaller than the diameter of the remainder of said sidewall comprising said outlet end.
Claim 9
Dependent Claim
212 words
The combination comprising a pair of telescopically connected fluid conduit members providing a continuous fluid passageway and a unitary check valve element controlling the direction of fluid flow through said passageway and sealing the connection between said conduit members, one of said conduit members having an inlet opening at one end thereof surrounded by a generally radially disposed bearing surface, said check valve made from an elastomeric material and including an axially elongated fluid inlet portion adjacent said one end and defining an annular abutment surface engaging said beaRing surface, a fluid outlet portion integrally connected to said inlet portion and axially extending into said one conduit member through said inlet opening, said outlet portion including means defining a fluid check valve, and an annular wall portion integrally connected to said inlet portion and extending in an axial direction therefrom and surrounding an associated portion of the exterior surface of said one conduit, said axially elongated fluid inlet portion extending axially outwardly beyond said bearing surface a distance substantially greater than the thickness of said annular wall portion, said inlet portion, said annular wall portion and said associated portion received in the other of said conduit members, said annular wall portion forming a seal between said one and said other conduit members.
Claim 10
Dependent Claim
212 words
The combination comprising a pair of telescopically connected fluid conduit members providing a continuous fluid passageway and a unitary check valve element controlling the direction of fluid flow through said passageway and sealing the connection between said conduit members, one of said conduit members having an inlet opening at one end thereof surrounded by a generally radially disposed bearing surface, said check valve made from an elastomeric material and including an axially elongated fluid inlet portion adjacent said one end and defining an annular abutment surface engaging said beaRing surface, a fluid outlet portion integrally connected to said inlet portion and axially extending into said one conduit member through said inlet opening, said outlet portion including means defining a fluid check valve, and an annular wall portion integrally connected to said inlet portion and extending in an axial direction therefrom and surrounding an associated portion of the exterior surface of said one conduit, said axially elongated fluid inlet portion extending axially outwardly beyond said bearing surface a distance substantially greater than the thickness of said annular wall portion, said inlet portion, said annular wall portion and said associated portion received in the other of said conduit members, said annular wall portion forming a seal between said one and said other conduit members.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |