Patent US3278271A successfully refreshed from Google Patents.
Patent US4015818A successfully refreshed from Google Patents.
US4015818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve with self-retaining valve seat
Assignee: International Telephone and Telegraph Corp
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Filing: 1975-07-23
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Granted: 1977-04-05
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Expires: 1995-07-23
Abstract
Abstract A valve body has a closing member rotatably mounted in a passage for opening and closing said passage. An annular groove having a substantially dove-tailed cross sectional portion is formed in said valve body for receiving an elastomeric annular seal ring. Said groove is positioned so that the seal ring is engaged by the periphery of the closing member when said closing member is in the closed position. The annular seal ring includes a pair of annular axially extending arms disposed on each side of said seal ring and an annular spring member embedded in said seal ring and extending into the axially extending arms so that when the seal ring is disposed in the groove the spring member forces said arms into engagement with the dove-tailed portion of the groove thereby rendering the seal ring self-retaining. The seal ring and groove are formed so that a space is provided between the arms and the main portion of the seal for trapping pressurized fluid that leaks passed the seal, said fluid exerting additional sealing pressure on the arms.
Inventors
- 👤 A. Assem Tawakol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:59
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/226; F16K1/2263
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
215 words
A valve, comprising: a body having a passage extending therethrough; a closing means moveably mounted in said body and including a closing member disposed in said passage for opening and closing said passage, said body and said closing member each having opposed surfaces when the closing member is closing said passage; a groove formed in one of said opposed surfaces, said groove being defined by surfaces that are formed and arranged to have an inner groove portion that is wider than an outer groove portion; seal means formed of resilient material disposed in said groove for providing a seal between the opposed surfaces, said seal means including at least one axially extending arm; and a spring member embedded in said seal means and extending into said arm for urging said arm in an axial direction away from said seal means into sealing engagement with the surfaces defining the wider inner groove portion and into an interference fit with the surfaces defining the narrower outer groove portion for retaining the seal means within said groove, whereby installation of the seal means into the groove is facilitated by the arm and spring means which may bend as they pass the outer groove portion and thereafter return to engage the inner groove portion and provide the interference fit.
Claim 2
Dependent Claim
215 words
A valve, comprising: a body having a passage extending therethrough; a closing means moveably mounted in said body and including a closing member disposed in said passage for opening and closing said passage, said body and said closing member each having opposed surfaces when the closing member is closing said passage; a groove formed in one of said opposed surfaces, said groove being defined by surfaces that are formed and arranged to have an inner groove portion that is wider than an outer groove portion; seal means formed of resilient material disposed in said groove for providing a seal between the opposed surfaces, said seal means including at least one axially extending arm; and a spring member embedded in said seal means and extending into said arm for urging said arm in an axial direction away from said seal means into sealing engagement with the surfaces defining the wider inner groove portion and into an interference fit with the surfaces defining the narrower outer groove portion for retaining the seal means within said groove, whereby installation of the seal means into the groove is facilitated by the arm and spring means which may bend as they pass the outer groove portion and thereafter return to engage the inner groove portion and provide the interference fit.
Claim 3
Dependent Claim
18 words
A valve member as described in claim 1, additionally comprising a compressible sealing bead formed on said arm.
Claim 4
Dependent Claim
37 words
A valve member as described in claim 1, wherein said groove includes a dove-tailed portion between the inner and outer portion, said dove-tailed portion being engaged by the arm to retain the seal means in said groove.
Claim 5
Dependent Claim
51 words
A valve as described in claim 1, wherein the seal means includes a pair of arms extending from opposite sides of the seal means, said arms being urged towards each other during insertion into the groove and thereafter spreading apart to engage the surfaces defining the outer portion of the groove.
Claim 6
Dependent Claim
17 words
A valve as described in claim 1, wherein the spring member is a sheet of spring material.
Claim 7
Dependent Claim
40 words
A valve as described in claim 1, wherein the spring member comprises a length of wire folded across the seal means and a cord woven between the folds of the wire to maintain a desired configuration of the folded wire.
Claim 8
Dependent Claim
43 words
A valve as described in claim 1, wherein the end of the arm engages the seal means thereby defining a space for trapping pressurized fluid that leaks past the seal means so that said pressurized fluid exerts a sealing force on said arm.
Claim 9
Dependent Claim
63 words
A valve as described in claim 1, wherein said seal means engages the surfaces of the groove defining the outer portion of the groove and the arms engage the surfaces of the groove defining the inner portion thereby defining a space for trapping pressurized fluid that leaks past the seal means so that said pressurized fluid exerts a sealing force on said arm.
Claim 10
Dependent Claim
47 words
A valve as described in claim 1, wherein the surfaces of the groove define a shoulder between the inner and outer portions and the arm includes a V-shaped groove for engaging the shoulder and forming a seal therebetween to prevent leakage past said arm during pressure surges.
Claim 11
Dependent Claim
73 words
A valve as described in claim 1, wherein the seal means has an intermediate portion between the inner and outer portion that is narrower than the outer portion and includes a shoulder which is engaged by a step formed in the arm when inserted into the groove thereby defining a space for trapping pressurized fluid that leaks past the seal means so that said pressurized fluid exerts a sealing force on said arm.
Claim 12
Dependent Claim
21 words
A valve as described in claim 1, wherein the passage has a generally cylindrical shape and the opposed surfaces are annular.
Claim 13
Dependent Claim
15 words
A valve as described in claim 11, wherein the groove and seal means are annular.
Claim 14
Dependent Claim
32 words
A valve as described in claim 12, wherein the seal means is formed of extruded material cut to a desired length and having the ends connected to form the annular seal means.
Claim 15
Dependent Claim
33 words
A valve as described in claim 1, in which said spring member has a curved cross sectional shape with at least one edge thereof being directed towards the other of said opposed surfaces.
Claim 16
Dependent Claim
33 words
A valve as described in claim 1, wherein the spring member has a cross sectional shape that is essentially straight with at least one end bent towards the other of said opposed surfaces.
References Cited (Backward Citations)
US1977351A
Cited
US2991043A
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US3051435A
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US3079123A
Cited
US3540696A
Cited
US3866925A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |