Patent US3563575A successfully refreshed from Google Patents.
US3563575A
Expired / Lapsed
US
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Pipe couplings
Assignee: Tungum Co Ltd
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Filing: 1968-11-04
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Granted: 1971-02-16
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Expires: 1988-11-04
Abstract
Abstract A pipe coupling comprising a body with a bore adapted to receive the pipe as a sliding fit and formed with a recess for an O-ring to encircle and seal against the pipe. A nut threaded on the body has an internal wedge surface, and a longitudinally split pipegripping collar encircles and grips the pipe and has an external wedge surface which is complementary to and cooperates with the wedge surface in the nut. The external wedge surface on the collar is relieved intermediate the ends of the collar, by a rectangular-section annular groove so as to decrease the area engaging the nut without decreasing the effective overall length of the wedge surface.
Inventors
- 👤 Richard Ayshford Sanford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:36
CPC Classifications
F; F16; F16L; F16L19/00; F16L19/08; F16L19/06; F16L19/061; F16L19/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A pipe coupling comprising a body with a bore receiving a pipe as a sliding fit and formed with a recess having an elastic deformable member therein that encircles and seals against the pipe, a nut threaded on the body with an internal wedgE surface, and a pipe-gripping collar that is longitudinally split throughout its length and that encircles and grips the pipe and that has an external wedge surface which is complementary to and cooperates with the wedge surface of the nut, the external wedge surface on the collar having an annular peripheral groove therein which is substantially wider than it is deep, said groove being disposed intermediate the ends of the wedge surface of the collar thereby to increase the gripping force of the collar on the pipe without substantially deforming the pipe.
Claim 2
Dependent Claim
135 words
A pipe coupling comprising a body with a bore receiving a pipe as a sliding fit and formed with a recess having an elastic deformable member therein that encircles and seals against the pipe, a nut threaded on the body with an internal wedgE surface, and a pipe-gripping collar that is longitudinally split throughout its length and that encircles and grips the pipe and that has an external wedge surface which is complementary to and cooperates with the wedge surface of the nut, the external wedge surface on the collar having an annular peripheral groove therein which is substantially wider than it is deep, said groove being disposed intermediate the ends of the wedge surface of the collar thereby to increase the gripping force of the collar on the pipe without substantially deforming the pipe.
References Cited (Backward Citations)
GB380035A
Cited
US2466526A
Cited
US2452277A
Cited
US2463707A
Cited
US2585453A
Cited
US3011807A
Cited
GB880495A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |