Patent US3109444A successfully refreshed from Google Patents.
US3109444A
Expired / Lapsed
US
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Check valve
Assignee: Yarnall Waring Co
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Filing: 1961-04-05
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Granted: 1963-11-05
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Expires: 1981-04-05
Abstract
No abstract record available.
Inventors
- 👤 John F Mckee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:58
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; Y; Y10; Y10T; Y10T137/00; Y10T137/6198; Y10T137/6253; Y10T137/6307; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
IN A CHECK VALVE, A HOUSING HAVING AN OPENING AT ONE END, AN OPENING AT THE OTHER END AND A VALVE CONTROL CHAMBER COMMUNICATING BETWEEN THE TWO OPENINGS, THE VALVE CONTROL CHAMBER HAVING A FLAT SEAT AT ONE END EXTENDING OUTWARDLY TRANSVERSE TO THE LENGTH, AND A LIMITING SHOULDER AT THE OTHER END EXTENDING OUTWARDLY TRANSVERSE TO THE AXIS, IN COMBINATION WITH A VALVE ELEMENT IN THE VALVE CONTROL CHAMBER, IN ONE POSITION ENGAGING THE SEAT AND CLOSING OFF FLOW AND IN ANOTHER POSITION ENGAGING THE LIMITING SHOULDER, THE VALVE ELEMENT BEING OF SHEET MATERIAL COMPRISING A FLAT SEAT ENGAGING PORTION WHICH IN ONE POSITION ENGAGES THE VALVE SEAT AND CLOSES THE VALVE, A VALVE CLOSURE PORTION INSIDE THE SEAT ENGAGING PORTION AND SPACED GUIDING FINGERS EXTENDING PROGRESSIVELY OUTWARDLY IN A CONICAL PLANE FROM THE SEAT ENGAGING PORTION AND DEFLECTED IN THE DIRECTION REMOTE FROM THE VALVE SEAT, SAID GUIDING FINGERS IN ONE POSITION OF THE VALVE ENGAGING SAID LIMITING SHOULDER.
Claim 2
Dependent Claim
161 words
IN A CHECK VALVE, A HOUSING HAVING AN OPENING AT ONE END, AN OPENING AT THE OTHER END AND A VALVE CONTROL CHAMBER COMMUNICATING BETWEEN THE TWO OPENINGS, THE VALVE CONTROL CHAMBER HAVING A FLAT SEAT AT ONE END EXTENDING OUTWARDLY TRANSVERSE TO THE LENGTH, AND A LIMITING SHOULDER AT THE OTHER END EXTENDING OUTWARDLY TRANSVERSE TO THE AXIS, IN COMBINATION WITH A VALVE ELEMENT IN THE VALVE CONTROL CHAMBER, IN ONE POSITION ENGAGING THE SEAT AND CLOSING OFF FLOW AND IN ANOTHER POSITION ENGAGING THE LIMITING SHOULDER, THE VALVE ELEMENT BEING OF SHEET MATERIAL COMPRISING A FLAT SEAT ENGAGING PORTION WHICH IN ONE POSITION ENGAGES THE VALVE SEAT AND CLOSES THE VALVE, A VALVE CLOSURE PORTION INSIDE THE SEAT ENGAGING PORTION AND SPACED GUIDING FINGERS EXTENDING PROGRESSIVELY OUTWARDLY IN A CONICAL PLANE FROM THE SEAT ENGAGING PORTION AND DEFLECTED IN THE DIRECTION REMOTE FROM THE VALVE SEAT, SAID GUIDING FINGERS IN ONE POSITION OF THE VALVE ENGAGING SAID LIMITING SHOULDER.
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) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |