US3645547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe couplings
Assignee: Hepworth Iron Co Ltd
•
Filing: 1969-10-17
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Granted: 1972-02-29
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Expires: 1989-10-17
Abstract
Abstract A pipe coupling comprises a slightly resilient plastics socket with an integral external peripheral projection adjacent its mouth, a resilient sealing ring having an annular sealing head inside the socket and an annular flange abutting the rim of the mouth of the socket, the sealing head being connected to the flange by an annular neck having a radial thickness less than the axial and radial thicknesses of the flange, and a locking ring of slightly resilient channel section plastics material, with the annular base of the channel section lying against the face of the flange of the sealing ring, remote from the mouth of the socket, with the annular inner side of the channel section locking ring lying against the inside face of the flange of the sealing ring and having an axial depth not greater than the axial thickness of the flange, and with the annular outer side of the channel section locking ring overlapping the outside of the mouth of the socket and having on its inner face an integral peripheral projection engaging behind the projection round the outside of the socket.
Inventors
- 👤 John B Glover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:50
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/06; F16L47/08; F16L47/10; Y; Y10; Y10S; Y10S285/00; Y10S285/921
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
218 words
A pipe coupling of the type comprising a slightly resilient plastic socket having an integral, external, peripheral projection adjacent its mouth, a resilient sealing ring having an annular sealing head disposed inside said socket and an annular flange abutting the rim of said socket mouth, said sealing head being connected to said flange by an annular neck having a radial thickness no greater than half the axial or radial thickness of said flange, and a locking ring of slightly resilient channel section plastic material, the annular base of the channel section lying against the face of said sealing ring flange remote from said socket mouth, the annular inner side of the channel section lying against the inside face of said sealing ring flange, and the annular outer side of the channel section overlapping the outside of said socket mouth and having on its inner face an integral peripheral projection engaging behind said socket projection; characterized in that the axial depth of said annular inner side of said channel section locking ring is substantially equal to the axial thickness of said sealing ring flange, and in that said annular sealing head is flared or blended from said anNular neck connecting it to said flange, whereby said neck lies substantially in the plane of said rim of said socket mouth.
Claim 2
Dependent Claim
218 words
A pipe coupling of the type comprising a slightly resilient plastic socket having an integral, external, peripheral projection adjacent its mouth, a resilient sealing ring having an annular sealing head disposed inside said socket and an annular flange abutting the rim of said socket mouth, said sealing head being connected to said flange by an annular neck having a radial thickness no greater than half the axial or radial thickness of said flange, and a locking ring of slightly resilient channel section plastic material, the annular base of the channel section lying against the face of said sealing ring flange remote from said socket mouth, the annular inner side of the channel section lying against the inside face of said sealing ring flange, and the annular outer side of the channel section overlapping the outside of said socket mouth and having on its inner face an integral peripheral projection engaging behind said socket projection; characterized in that the axial depth of said annular inner side of said channel section locking ring is substantially equal to the axial thickness of said sealing ring flange, and in that said annular sealing head is flared or blended from said anNular neck connecting it to said flange, whereby said neck lies substantially in the plane of said rim of said socket mouth.
Claim 3
Dependent Claim
28 words
A pipe coupling as in claim 1, wherein the radial thickness of the flange is less than the radial distance between sides of the channel section locking ring.
Claim 4
Dependent Claim
48 words
A pipe coupling as in claim 1, wherein the sealing head is spaced from the neck farther into the socket and connected to the neck by an intermediate portion affording a lead-in to the sealing head from the outside surface of the inner side of the locking ring.
Claim 5
Dependent Claim
25 words
A pipe coupling as in claim 3, wherein the side of the intermediate portion nearest the wall of the socket arches away from that wall.
Claim 6
Dependent Claim
24 words
A pipe coupling as in claim 1, wherein the sealing head has a generally triangular cross section with one corner blended into the neck.
Claim 7
Dependent Claim
27 words
A pipe coupling as in claim 5, wherein the side of the section adjacent the wall of the socket diverges away from the wall of the socket.
References Cited (Backward Citations)
FR642987A
Cited
US2116705A
Cited
US3047025A
Cited
FR1362532A
Cited
CH432953A
Cited
FR1472035A
Cited
US3400954A
Cited
US3516693A
Cited
NL6805101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |