Patent US3324877A successfully refreshed from Google Patents.
US3324877A
Expired / Lapsed
US
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Check valve
Assignee: General Electric Co
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Filing: 1963-12-30
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Granted: 1967-06-13
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Expires: 1983-12-30
Abstract
No abstract record available.
Inventors
- 👤 Bochan John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:02
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; F16K15/147; F16K15/1471; F16K15/1402; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/784; Y10T137/7843; Y10T137/7879; Y10T137/788; Y10T137/7882
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A CHECK VALVE FOR USE IN A CONDUIT COMPRISING: (A) A COLUMN SECURED IN SAID CONDUIT TO EXTEND AXIALLY THEREWITHIN, SAID COLUMN HAVING AN AXIALLY EXTENDING PORTION THEREOF FORMED WITH A SMOOTHLY CURVED CROSS SECTIONAL CONTOUR, SAID CONTOUR INCLUDING OPPOSED CONCAVE SECTIONS JOINED BY CONVEX SECTIONS, SAID CONCAVE SECTIONS FORMING A SUBSTANTIALLY LARGER PART OF SAID CONTOUR THAN SAID CONVEX SECTIONS; (B) AND A VALVE MEMBER OF ELASTOMERIC MATERIAL SECURED AT ITS UPSTREAM END IN SAID CONDUIT, SAID VALVE MEMBER HAVING AN AXIALLY EXTENDING TUBULAR PORTION THEREOF TERMINATING SUBSTANTIALLY AT THE DOWNSTREAM END OF SAID COLUMN, SAID TUBULAR PORTION BEING FORMED AND POSITIONED TO BE IN FEMALE MATING RELATION TO SAID COLUMN PORTION; (C) SAID TUBULAR PORTION DEFORMING IN RESPONSE TO PRESSURE UPSTREAM THEREOF SO THAT THE CONCAVE PORTION THEREOF DEFORMS TO A CONVEX CONFIGURATION TO ALLOW FLOW, SAID TUBULAR PORTION BEING TIGHTLY PRESSED ABOUT SAID COLUMN PORTION IN RESPONSE TO DOWNSTREAM PRESSURE TO PREVENT FLOW.
Claim 2
Dependent Claim
156 words
A CHECK VALVE FOR USE IN A CONDUIT COMPRISING: (A) A COLUMN SECURED IN SAID CONDUIT TO EXTEND AXIALLY THEREWITHIN, SAID COLUMN HAVING AN AXIALLY EXTENDING PORTION THEREOF FORMED WITH A SMOOTHLY CURVED CROSS SECTIONAL CONTOUR, SAID CONTOUR INCLUDING OPPOSED CONCAVE SECTIONS JOINED BY CONVEX SECTIONS, SAID CONCAVE SECTIONS FORMING A SUBSTANTIALLY LARGER PART OF SAID CONTOUR THAN SAID CONVEX SECTIONS; (B) AND A VALVE MEMBER OF ELASTOMERIC MATERIAL SECURED AT ITS UPSTREAM END IN SAID CONDUIT, SAID VALVE MEMBER HAVING AN AXIALLY EXTENDING TUBULAR PORTION THEREOF TERMINATING SUBSTANTIALLY AT THE DOWNSTREAM END OF SAID COLUMN, SAID TUBULAR PORTION BEING FORMED AND POSITIONED TO BE IN FEMALE MATING RELATION TO SAID COLUMN PORTION; (C) SAID TUBULAR PORTION DEFORMING IN RESPONSE TO PRESSURE UPSTREAM THEREOF SO THAT THE CONCAVE PORTION THEREOF DEFORMS TO A CONVEX CONFIGURATION TO ALLOW FLOW, SAID TUBULAR PORTION BEING TIGHTLY PRESSED ABOUT SAID COLUMN PORTION IN RESPONSE TO DOWNSTREAM PRESSURE TO PREVENT FLOW.
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) | 1970-06-12 | 1970-12-12 | 1971-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-12 | 1974-12-12 | 1975-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-12 | 1978-12-12 | 1979-06-13 | $7700.00 | Window Closed / Lapsed |