US3386470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid check valve assembly
Assignee: Greiner Scientific Corp
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Filing: 1966-03-09
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Granted: 1968-06-04
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Expires: 1986-03-09
Abstract
No abstract record available.
Inventors
- 👤 George G Goda
- 👤 Coniglione Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:13
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/01; G05D7/0126; G05D7/0133; F; F16; F16K; F16K15/00; F16K15/02; F16K15/025; F16K15/026; F16K15/14; F16K15/144; F16K15/145; F16K17/00; F16K17/02; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7854; Y10T137/7856; Y10T137/7866; Y10T137/7879; Y10T137/7888; Y10T137/7889
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
IN A LIQUID PUMPING SYSTEM, A CHECK VALVE ASSEMBLY COMPRISING A VALVE HOUSING FORMED WITH A LIQUID CONDUIT AND A VALVE SEAT, AND AN ELONGATED VALVE SLIDABLY DISPOSED IN SAID CONDUIT, SAID VALVE BEING OF HOLLOW CONICAL SHAPE AND HAVING AN ENLARGED MOUTH PORTION ADAPTED TO CLOSE AGAINST SAID VALVE SEAT, AND WHEREIN SAID VALVE IS SUBSTANTIALLY FORMED OF THINWALLED, CHEMICALLY INERT PLASTIC MATERIAL, THE WALL THEREOF INCLUDING SAID MOUTH PORTION BEING RESILIENT AND DEFORMABLE, AND A RELATIVELY RIGID DISC-LIKE ANNULAR BASE FOR SAID VALVE WALL, AND INCLUDING A FLOATING DISC IN SAID CONDUIT NORMALLY ADJACENT TO THE MOUTH OF SAID VALVE AND OF A DIAMETER AT LEAST THAT OF SAID MOUTH, AND A VALVE SPRING IN SAID CONDUIT AND BEARING AGAINST SAID FLOATING DISC SO AS TO APPLY VALVE CLOSING PRESSURE TO SAID VALVE.
Claim 2
Dependent Claim
135 words
IN A LIQUID PUMPING SYSTEM, A CHECK VALVE ASSEMBLY COMPRISING A VALVE HOUSING FORMED WITH A LIQUID CONDUIT AND A VALVE SEAT, AND AN ELONGATED VALVE SLIDABLY DISPOSED IN SAID CONDUIT, SAID VALVE BEING OF HOLLOW CONICAL SHAPE AND HAVING AN ENLARGED MOUTH PORTION ADAPTED TO CLOSE AGAINST SAID VALVE SEAT, AND WHEREIN SAID VALVE IS SUBSTANTIALLY FORMED OF THINWALLED, CHEMICALLY INERT PLASTIC MATERIAL, THE WALL THEREOF INCLUDING SAID MOUTH PORTION BEING RESILIENT AND DEFORMABLE, AND A RELATIVELY RIGID DISC-LIKE ANNULAR BASE FOR SAID VALVE WALL, AND INCLUDING A FLOATING DISC IN SAID CONDUIT NORMALLY ADJACENT TO THE MOUTH OF SAID VALVE AND OF A DIAMETER AT LEAST THAT OF SAID MOUTH, AND A VALVE SPRING IN SAID CONDUIT AND BEARING AGAINST SAID FLOATING DISC SO AS TO APPLY VALVE CLOSING PRESSURE TO SAID VALVE.
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) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |