US3237616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recycle valve
Assignee: Richfield Oil Corp
•
Filing: 1964-07-06
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Granted: 1966-03-01
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Expires: 1984-07-06
Abstract
No abstract record available.
Inventors
- 👤 Harold D Daigh
- 👤 Lawrence M Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:54
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/02; F01M13/021; F01M13/022; F01M13/023; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7748; Y10T137/7749; Y10T137/7837; Y10T137/7879; Y10T137/788; Y10T137/7882; Y10T137/7886
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN A TUBULAR VALVE STRUCTURE HAVING A PREFORMED CLOSED SECTION TRAVERSING SAID TUBULAR VALVE, WHEREIN SAID VALVE IS OPERATIVELY CONNECTIBLE IN CONDUIT MEANS PROVIDING FLUID COMMUNICATION BETWEEN THE ENGINE AND THE INDUCTION SYSTEM OF AN INTERNAL COMBUSTION ENGINE AND WHEREIN SAID VALVE IS SO ARRANGED AND CONSTRUCTED AS TO CLOSE SAID CONDUIT MEANS IN RESPONSE TO MANIFOLD VACUUM AND OPEN SAID CONDUIT MEANS FROM SAID ENGINE INTO SAID BUILDUP IN SAID ENGINE TO THEREBY PASS ENGINE FLUIDS THROUGH SAID CONDUIT MEANS FROM SAID ENGINE INTO SAID INDUCTION SYSTEM, THE IMPROVEMENT COMPRISING: BELLOWS MEANS FORMED IN SAID TUBULAR VALVE STRUCTURE FOR TENSIONING SAID TUBULAR VALVE IN SAID CONDUIT MEANS.
Claim 2
Dependent Claim
108 words
IN A TUBULAR VALVE STRUCTURE HAVING A PREFORMED CLOSED SECTION TRAVERSING SAID TUBULAR VALVE, WHEREIN SAID VALVE IS OPERATIVELY CONNECTIBLE IN CONDUIT MEANS PROVIDING FLUID COMMUNICATION BETWEEN THE ENGINE AND THE INDUCTION SYSTEM OF AN INTERNAL COMBUSTION ENGINE AND WHEREIN SAID VALVE IS SO ARRANGED AND CONSTRUCTED AS TO CLOSE SAID CONDUIT MEANS IN RESPONSE TO MANIFOLD VACUUM AND OPEN SAID CONDUIT MEANS FROM SAID ENGINE INTO SAID BUILDUP IN SAID ENGINE TO THEREBY PASS ENGINE FLUIDS THROUGH SAID CONDUIT MEANS FROM SAID ENGINE INTO SAID INDUCTION SYSTEM, THE IMPROVEMENT COMPRISING: BELLOWS MEANS FORMED IN SAID TUBULAR VALVE STRUCTURE FOR TENSIONING SAID TUBULAR VALVE IN SAID CONDUIT MEANS.
References Cited (Backward Citations)
US3077871A
Cited
US3157467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |