US3075547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swing check valve
Assignee: Individual
•
Filing: 1960-04-22
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Granted: 1963-01-29
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Expires: 1980-04-22
Abstract
No abstract record available.
Inventors
- 👤 Scaramucci Domer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:00
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/02; F16K27/0209; F16K27/0227; F16K15/00; F16K15/02; F16K15/03; F16K27/0232; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7866; Y10T137/7867; Y10T137/7868; Y10T137/7898; Y10T137/79; Y10T137/7901
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
120 words
IN A CHECK VALVE, THE IMPROVEMENT WHICH COMPRISES AN ANNULAR SEAT HAVING FRUSTO-CONICAL AND FLAT SEATING SURFACES; PIVOTALLY MOUNTED VALVE CLOSURE MEANS HAVING A GENERALLY FRUSTO-CONICAL SEALING SURFACE AND DISPOSED ADJACENT SAID SEAT, SAID VALVE CLOSURE MEANS HAVING AN ANNULAR GROOVE IN SAID FRUSTO-CONICAL SEALING SURFACE; AND A RESILIENT SEALING MEMBER RETAINED IN SAID GROOVE, SAID RESILIENT SEALING MEMBER HAVING A TAPERED LIP PROJECTING NORMAL TO SAID FRUSTO-CONICAL SEALING SURFACE FOR RESILIENTLY ENGAGING SAID FLAT SEATING SURFACE UPON CLOSURE OF SAID CHECK VALVE, AND FURTHER HAVING A SEALING SURFACE EXTENDING SUBSTANTIALLY PARALLEL TO SAID FRUSTO-CONICAL SEALING SURFACE WHEREBY SAID VALVE CLOSURE MEANS AND ITS ASSOCIATED RESILIENT SEALING MEMBER PROVIDE TRIPPLE SEALING CONTACT WITH SAID SEAT WHEN SAID VALVE IS CLOSED.
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) | 1966-01-28 | 1966-07-30 | 1967-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-28 | 1970-07-30 | 1971-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-28 | 1974-07-30 | 1975-01-29 | $7700.00 | Window Closed / Lapsed |