Patent DE749696C successfully refreshed from Google Patents.
Patent CA748015A successfully refreshed from Google Patents.
US3378030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: SPX Technologies Inc
•
Filing: 1965-07-26
•
Granted: 1968-04-16
•
Expires: 1985-07-26
Abstract
No abstract record available.
Inventors
- 👤 Francis H Cary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:22
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/025; F16K15/026; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7854; Y10T137/7857; Y10T137/7866; Y10T137/7867; Y10T137/7868; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7937
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
211 words
A CHECK VALVE COMPRISING (A) A CYLINDRICAL BODY HAVING PARALLEL END FACES AND CONTAINING A BORE WHICH OPENS THROUGH SAID FACES, THE BORE BEING PROVIDED WITH A STEP INTERMEDIATE ITS ENDS THAT DEFINES AN ANNULAR SHOULDER THAT DIVIDES THE BORE INTO LARGE AND SMALL DIAMETER PORTIONS, THE INNER EDGE OF THE SHOULDER BEING ROUNDED; (B) THREE ANNULAR GROOVES, ONE FORMED IN EACH END FACE AND THE OTHER FORMED IN THE SHOULDER, THE GROOVES ENCIRCLING THE BORE; (C) AN ELASTIC SEALING RING SEATED IN EACH ANNULAR GROOVE; (D) A THIN, SHEET METAL VALVE HEAD HAVING AN ANNULAR FLANGE PORTION PROVIDED WITH A FLAT SURFACE THAT OVERLIES THE GROOVE IN THE SHOULDER, A SPHERICAL PORTION THAT PROJECTS INTO THE SMALL DIAMETER PORTION OF THE BORE, AND AN INTERMEDIATE CONNECTING PORTION WHICH IS CURVED TO FIT THE ROUNDED EDGE OF THE SHOULDER; (E) A SPIDER MEMBER FIXED IN THE LARGE DIAMETER PORTION OF THE BORE AND HAVING CIRCUMFERENTIALLY SPACED MEANS WHICH COOPERATES WITH THE OUTER PERIPHERY OF THE FLANGE PORTION OF THE VALVE HEAD TO GUIDE THE HEAD IN ITS OPENING AND CLOSING MOVEMENTS; AND (F) A COIL COMPRESSION SPRING REACTING BETWEEN THE SPIDER MEMBER AND THE SPHERICAL PORTION OF THE VALVE HEAD AND URGING THE VALVE HEAD TOWARD THE SHOULDER ON THE BODY.
Claim 2
Dependent Claim
211 words
A CHECK VALVE COMPRISING (A) A CYLINDRICAL BODY HAVING PARALLEL END FACES AND CONTAINING A BORE WHICH OPENS THROUGH SAID FACES, THE BORE BEING PROVIDED WITH A STEP INTERMEDIATE ITS ENDS THAT DEFINES AN ANNULAR SHOULDER THAT DIVIDES THE BORE INTO LARGE AND SMALL DIAMETER PORTIONS, THE INNER EDGE OF THE SHOULDER BEING ROUNDED; (B) THREE ANNULAR GROOVES, ONE FORMED IN EACH END FACE AND THE OTHER FORMED IN THE SHOULDER, THE GROOVES ENCIRCLING THE BORE; (C) AN ELASTIC SEALING RING SEATED IN EACH ANNULAR GROOVE; (D) A THIN, SHEET METAL VALVE HEAD HAVING AN ANNULAR FLANGE PORTION PROVIDED WITH A FLAT SURFACE THAT OVERLIES THE GROOVE IN THE SHOULDER, A SPHERICAL PORTION THAT PROJECTS INTO THE SMALL DIAMETER PORTION OF THE BORE, AND AN INTERMEDIATE CONNECTING PORTION WHICH IS CURVED TO FIT THE ROUNDED EDGE OF THE SHOULDER; (E) A SPIDER MEMBER FIXED IN THE LARGE DIAMETER PORTION OF THE BORE AND HAVING CIRCUMFERENTIALLY SPACED MEANS WHICH COOPERATES WITH THE OUTER PERIPHERY OF THE FLANGE PORTION OF THE VALVE HEAD TO GUIDE THE HEAD IN ITS OPENING AND CLOSING MOVEMENTS; AND (F) A COIL COMPRESSION SPRING REACTING BETWEEN THE SPIDER MEMBER AND THE SPHERICAL PORTION OF THE VALVE HEAD AND URGING THE VALVE HEAD TOWARD THE SHOULDER ON THE BODY.
References Cited (Backward Citations)
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Cited
US2786485A
Cited
FR1086204A
Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |