US3633928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe joint coupling with gasket seal
Assignee: Individual
•
Filing: 1970-03-05
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Granted: 1972-01-11
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Expires: 1990-03-05
Abstract
Abstract An apparatus for holding two pipe ends together which are subject to repeated stresses tending to pull them apart in an axial direction comprising a sealing element seated in generally rectangular, open-ended slots provided in each pipe end, and slots facing each other, said element being formed of resilient metal in the configuration of a circumferentially corrugated cylindrical ring, the ends of the ring being folded back upon the body of the ring inwardly toward the axis of the coupling and seated in said facing annular slots.
Inventors
- 👤 Douglas Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:23
CPC Classifications
F; F16; F16L; F16L17/00; F16L17/06; F16L17/08; F16L23/00; F16L23/04; F16L23/16; F16L23/18; F16L23/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
In combination with the ends of a pair of axially aligned pipe sections having grooves of generally rectangular open ended form in abutting face-to-face relation, a generally cylindrical sealing element, said sealing element having its opposite annular ends disposed in said grooves; at least a pair of circumferential corrugations formed in said cylindrical sealing element; the spaced ends of said element being folded back inwardly toward said pipe ends and tightly against the body of said seal element whereby axial displacement of said pipe ends causes axial expansion of said seal element while said ends bear against the bottoms of said grooves in sealing contact irrespective of the axial displacement of said pipe ends.
Claim 2
Dependent Claim
114 words
In combination with the ends of a pair of axially aligned pipe sections having grooves of generally rectangular open ended form in abutting face-to-face relation, a generally cylindrical sealing element, said sealing element having its opposite annular ends disposed in said grooves; at least a pair of circumferential corrugations formed in said cylindrical sealing element; the spaced ends of said element being folded back inwardly toward said pipe ends and tightly against the body of said seal element whereby axial displacement of said pipe ends causes axial expansion of said seal element while said ends bear against the bottoms of said grooves in sealing contact irrespective of the axial displacement of said pipe ends.
Claim 3
Dependent Claim
19 words
The combination as defined in claim 1 wherein a clamp surrounds and maintains the pipe ends in aligned relation.
Claim 4
Dependent Claim
18 words
The combination defined in claim 1 wherein said corrugations are disposed inwardly toward the axis of said coupling.
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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |