US3871687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe connections and connectors therefor
Assignee: GABINE PRECISION TUBES Ltd
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Filing: 1973-10-03
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Granted: 1975-03-18
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Expires: 1993-10-03
Abstract
Abstract A pipe connection between two pipe lengths arranged end to end comprises an annular ring of electrical insulating material positioned between the pipe ends. The ring has annular flanges surrounding each pipe with an O-ring seal between each flange and the respective pipe end. A single casting overlaps each flange and the outer surface of each pipe end which is provided with anchoring means precluding longitudinal movement of the pipe end relative to the casting. An outer sleeve surrounds the casting and further anchoring means preclude longitudinal movement of the sleeve relative to the casting.
Inventors
- 👤 Basil Frederick Dockree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:00
CPC Classifications
F; F16; F16L; F16L25/00; F16L25/02; F16L25/03
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
161 words
A leakproof pipe connection between two pipe lengths arranged end to end comprising an annular ring of electrical insulating material positioned between the pipe ends and maintaining the ends in spaced relation, the ring having annular flanges respectively surrounding the outer peripheral surface of each pipe end, an O-ring seal between said outer peripheral surface of each pipe end and the inner surface of the respective flange of the spacing ring, a casting of electrical insulating material overlapping each flange and extending beyond each flange to overlap the outer surface of and be in contact with the adjacent length of otherwise exposed pipe, an outer metal sleeve surrounding said casting, anchoring means on at least a part of said outer surface of each said length of otherwise exposed pipe in contact with the casting precluding longitudinal movement of the respective pipe end relative to the casting, and further anchoring means precluding longitudinal movement of the outer sleeve relative to the casting.
Claim 2
Dependent Claim
161 words
A leakproof pipe connection between two pipe lengths arranged end to end comprising an annular ring of electrical insulating material positioned between the pipe ends and maintaining the ends in spaced relation, the ring having annular flanges respectively surrounding the outer peripheral surface of each pipe end, an O-ring seal between said outer peripheral surface of each pipe end and the inner surface of the respective flange of the spacing ring, a casting of electrical insulating material overlapping each flange and extending beyond each flange to overlap the outer surface of and be in contact with the adjacent length of otherwise exposed pipe, an outer metal sleeve surrounding said casting, anchoring means on at least a part of said outer surface of each said length of otherwise exposed pipe in contact with the casting precluding longitudinal movement of the respective pipe end relative to the casting, and further anchoring means precluding longitudinal movement of the outer sleeve relative to the casting.
Claim 3
Dependent Claim
33 words
A pipe connection according to claim 1, wherein the electrical insulating material of the annular spacing ring and the casting is a material which maintains its physical characteristics at a temperature of 100*C.
Claim 4
Dependent Claim
15 words
A pipe connection according to claim 2, wherein the material is glass fibre reinforced polyester.
Claim 5
Dependent Claim
20 words
A pipe connection according to claim 2, wherein the annular spacing ring and the casting are formed of epoxy resin.
Claim 6
Dependent Claim
33 words
A pipe connection according to claim 1, wherein said anchoring means on the outer surface of each pipe end is a machining operation selected from knurling, spaced circumferential grooves and a screw thread.
Claim 7
Dependent Claim
24 words
A pipe connection according to claim 1, wherein said further anchoring means is a screw thread on the inner surface of the outer sleeve.
Claim 8
Dependent Claim
28 words
A pipe connection according to claim 1, wherein said further anchoring means is provided by forming each end of the outer sleeve inwardly towards the respective pipe end.
Claim 9
Dependent Claim
22 words
A pipe connection according to claim 1, including means to preclude rotation of each pipe end relative to the annular spacing ring.
Claim 10
Dependent Claim
29 words
A pipe connection according to claim 8, wherein each pipe end adjacent the spacing ring has at least one slot for receiving a tongue projecting longitudinally from the ring.
Claim 11
Dependent Claim
42 words
A pipe connector comprising a pipe connection according to claim 1, wherein the pipe ends are constituted by a pair of pups which project beyond the ends of the casting for connection with respective ends of two pipes to be connected together.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |