US3827734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe couplings
Assignee: HIPWORTH PLASTICS Ltd
•
Filing: 1973-02-26
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Granted: 1974-08-06
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Expires: 1993-02-26
Abstract
Abstract A sealing ring is retained in an enlargement at the outer end of a plastics pipe coupling socket by a channel-section plastics retaining ring with snap-over engagement of its outer limb with the outside of the enlargement, with the inner limb fitting closely to the inside of the enlargement and terminating in an annular face having a radial extent substantially equal to the radial extent of an inner end face of the enlargement and spaced therefrom by at least the axial thickness of the sealing ring, the close fit of the inner limb of the retaining ring to the inside of the enlargement ensuring that the retaining ring will not twist off under pressure from within the socket, while the snap-over engagement prevents the retaining ring being pushed off.
Inventors
- 👤 K Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:00
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/06; F16L47/08; F16L47/10; Y; Y10; Y10S; Y10S285/00; Y10S285/921
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
190 words
A plastics pipe coupling socket having an enlargement at its outer end, said enlargement having a radially extending inner face, said enlargement housing a sealing ring for making sealing contact with said enlargement and round the whole periphery of the spigot end of a pipe-length inserted into the socket, a channel shaped plastics retaining ring having inner and outer limbs integrally connected together by a bridging portion, said outer limb having a rib on the inside surface thereof, the outside of the socket enlargement being provided with at least one circumferential rib for snap-over engagement by said rib on the inside of the outer limb of said channel-section plastics retaining ring, said inner limb of which fits closely to the inside wall of the socket enlargement and terminates in an inwardly projecting annular flange having a radial extent substantially equal to the radial extent of said inner end face of the socket enlargement and spaced therefrom by at least the axial thickness of the sealing ring, and a series of circumferentially spaced gussets being provided integral with the inner limb of the retaining ring and the inwardly projecting annular flange.
Claim 2
Dependent Claim
190 words
A plastics pipe coupling socket having an enlargement at its outer end, said enlargement having a radially extending inner face, said enlargement housing a sealing ring for making sealing contact with said enlargement and round the whole periphery of the spigot end of a pipe-length inserted into the socket, a channel shaped plastics retaining ring having inner and outer limbs integrally connected together by a bridging portion, said outer limb having a rib on the inside surface thereof, the outside of the socket enlargement being provided with at least one circumferential rib for snap-over engagement by said rib on the inside of the outer limb of said channel-section plastics retaining ring, said inner limb of which fits closely to the inside wall of the socket enlargement and terminates in an inwardly projecting annular flange having a radial extent substantially equal to the radial extent of said inner end face of the socket enlargement and spaced therefrom by at least the axial thickness of the sealing ring, and a series of circumferentially spaced gussets being provided integral with the inner limb of the retaining ring and the inwardly projecting annular flange.
Claim 3
Dependent Claim
31 words
The pipe coupling socket of claim 1 wherein said inner limb of the retaining ring projects axially within the socket enlargement for a distance including the location of said circumferential rib.
Claim 4
Dependent Claim
28 words
A pipe coupling socket as in claim 1, wherein the inner limb of the retaining ring has a generally similar thickness to the thickness of the outer limb.
Claim 5
Dependent Claim
52 words
A pipe coupling socket as in claim 1, wherein said outer limb has two ribs on the inside surface thereof, and the outside of the socket enlargement is provided with two circumferential ribs for snap-over engagement by the said two ribs on the inside of the outer limb of the retaining ring.
Claim 6
Dependent Claim
32 words
The pipe coupling socket of claim 4 wherein said inner limb of the retaining ring projects axially within the socket enlargement for a distance including the locations of said two circumferential ribs.
References Cited (Backward Citations)
FR1384638A
Cited
US3544119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |