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Patent US3765707A successfully refreshed from Google Patents.
US3765707A
Expired / Lapsed
US
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Pipe joint
Assignee: Sandvik AB
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Filing: 1971-12-06
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Granted: 1973-10-16
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Expires: 1991-12-06
Abstract
Abstract For use in the food-processing industry, a pipe coupling for flanged pipes, which provides a joint free from inside crevices (where food particles might lodge) comprises annular opposed grooves on confronting faces of the flanges which grooves partially surround a sealing ring disposed between them, the back faces of the flanges being pressed together by a resilient clamping ring.
Inventors
- 👤 Westberg A Torsten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:08
CPC Classifications
F; F16; F16L; F16L23/00; F16L23/16; F16L23/18; F16L23/22; F16L37/00; F16L37/08; F16L37/12; F16L37/1225
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
A pipe joint comprising opposed flanges (11, 14) on the pipe ends (10, 13) the adjacent faces of which have annular opposed grooves (12, 15) partly surrounding a sealing ring (16) accommodated between the grooves, the back faces (22, 23) of the flanges being surrounded by a resilient clamping ring (21), wherein the resilient clamping ring (21) consists of two principally equal parts or halves, preferably made of plastic, each comprising clamps (25, 26) and locking devices (28, 29) consisting of resilient tongues (35, 36) provided with hooks (30, 31) and corresponding notches (37, 38), the clamping ring parts or halves being designed to be brought together and locked by pivoting motion of each clamping ring part, at which motion the mentioned hook (30, 31) belonging to one half is supported in the mentioned notch (37, 38) belonging to the other half, while the remaining hook and notch form a locking device at the final period of the pivoting motion.
Claim 2
Dependent Claim
160 words
A pipe joint comprising opposed flanges (11, 14) on the pipe ends (10, 13) the adjacent faces of which have annular opposed grooves (12, 15) partly surrounding a sealing ring (16) accommodated between the grooves, the back faces (22, 23) of the flanges being surrounded by a resilient clamping ring (21), wherein the resilient clamping ring (21) consists of two principally equal parts or halves, preferably made of plastic, each comprising clamps (25, 26) and locking devices (28, 29) consisting of resilient tongues (35, 36) provided with hooks (30, 31) and corresponding notches (37, 38), the clamping ring parts or halves being designed to be brought together and locked by pivoting motion of each clamping ring part, at which motion the mentioned hook (30, 31) belonging to one half is supported in the mentioned notch (37, 38) belonging to the other half, while the remaining hook and notch form a locking device at the final period of the pivoting motion.
References Cited (Backward Citations)
GB382169A
Cited
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Cited
US2789844A
Cited
US3231298A
Cited
CH418750A
Cited
US3398978A
Cited
US3370752A
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US3669474A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |