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US3077205A
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Non-return valves
Assignee: P Frankenstein and Sons Manchester Ltd
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Filing: 1961-02-13
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Granted: 1963-02-12
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Expires: 1981-02-13
Abstract
No abstract record available.
Inventors
- 👤 Butterworth Clifford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:28
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; F16K17/00; F16K17/18; F16K17/19; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7879; Y10T137/7888; Y10T137/789
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A NON-RETURN VALVE COMPRISING A BODY HAVING A FLAT VALVE SEAT, A FLAT ELASTIC VALVE ADAPTED TO BE SEATED THEREON, AN ANNULAR MEMBER IN A PLANE OUTSIDE OF AND SUBSTANTIALLY PARALLEL TO THE PLANE OF SAID VALVE, MEANS FOR CLAMPING SAID MEMBER TO SAID BODY ALONG THE PERIPHERY OF SAID MEMBER, A PLURALITY OF ANGULARLY-SPACED BARS INTEGRAL WITH AND CONNECTING SAID MEMBER AND VALVE, SAID BARS BEING INCLINED IN A NON-RADIAL CIRCUMFERENTIAL DIRECTION AND BEING AT AN ANGLE TO THE PLANE OF SAID VALVE, WHEREBY SAID BARS ARE ADAPTED TO URGE SAID VALVE TOWARDS A POSITION CONCENTRIC WITH SAID MEMBER.
Claim 2
Dependent Claim
100 words
A NON-RETURN VALVE COMPRISING A BODY HAVING A FLAT VALVE SEAT, A FLAT ELASTIC VALVE ADAPTED TO BE SEATED THEREON, AN ANNULAR MEMBER IN A PLANE OUTSIDE OF AND SUBSTANTIALLY PARALLEL TO THE PLANE OF SAID VALVE, MEANS FOR CLAMPING SAID MEMBER TO SAID BODY ALONG THE PERIPHERY OF SAID MEMBER, A PLURALITY OF ANGULARLY-SPACED BARS INTEGRAL WITH AND CONNECTING SAID MEMBER AND VALVE, SAID BARS BEING INCLINED IN A NON-RADIAL CIRCUMFERENTIAL DIRECTION AND BEING AT AN ANGLE TO THE PLANE OF SAID VALVE, WHEREBY SAID BARS ARE ADAPTED TO URGE SAID VALVE TOWARDS A POSITION CONCENTRIC WITH SAID MEMBER.
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) | 1966-02-11 | 1966-08-13 | 1967-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-11 | 1970-08-13 | 1971-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-11 | 1974-08-13 | 1975-02-12 | $7700.00 | Window Closed / Lapsed |