Patent US3253607A successfully refreshed from Google Patents.
US3253607A
Expired / Lapsed
US
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Combination pump and flow regulator
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1964-06-10
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Granted: 1966-05-31
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Expires: 1984-06-10
Abstract
No abstract record available.
Inventors
- 👤 Gilbert H Drutchas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:45
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/24; F04C14/26; B; B62; B62D; B62D6/00; B62D6/02; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2579; Y10T137/2592
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A FLOW REGULATOR COMPRISING A CYLINDRICAL CHAMBER HAVING SPACED INLET AND BY-PASS OPENINGS AND A BY-PASS PASSAGE, SAID CHAMBER FURTHER INCLUDING AN OUTLET OPENING, AND A SPOOL VALVE IN SAID CHAMBER HAVING A PAIR OF ORIFICES BOTH COMMUNICATING WITH SAID INLET AND OUTLET AT A FIRST POSITION WHEREIN SAID BY-PASS PASSAGE IS CLOSED, SAID VALVE BEING CONSTRUCTED TO MOVE IN SAID CHAMBER BY DIFFERENTIAL PRESSURE BETWEEN SAID INLET AND OUTLET TOWARDS A SECOND POSITION WHEREIN SAID BY-PASS OPENING IS COMMUNICATED WITH SAID INLET BY SAID BYPASS PASSAGE, ONE OF SAID ORIFICES BEING SPACED WITH RESPECT TO SAID INLET TO CONTINUE COMMUNICATION WITH SAID OUTLET AT SAID SECOND POSITION, THE OTHER OF SAID ORIFICES BEING SPACED TO MOVE INTO PARTIAL REGISTRATION WITH SAID BY-PASS OPENING AS SAID VALVE OPENS SAID BY-PASS PASSAGE, SAID OTHER OF SAID ORIFICES BEING SO LOCATED WITH RESPECT TO SAID BY-PASS PASSAGE IN ITS OPEN POSITION AS TO EFFECT AN ASPIRATING ACTION ON SAID OTHER ORIFICE, THEREBY PRODUCING A DROOPING FLOW CHARACTERISTIC IN SAID FLOW REGULATOR.
Claim 2
Dependent Claim
169 words
A FLOW REGULATOR COMPRISING A CYLINDRICAL CHAMBER HAVING SPACED INLET AND BY-PASS OPENINGS AND A BY-PASS PASSAGE, SAID CHAMBER FURTHER INCLUDING AN OUTLET OPENING, AND A SPOOL VALVE IN SAID CHAMBER HAVING A PAIR OF ORIFICES BOTH COMMUNICATING WITH SAID INLET AND OUTLET AT A FIRST POSITION WHEREIN SAID BY-PASS PASSAGE IS CLOSED, SAID VALVE BEING CONSTRUCTED TO MOVE IN SAID CHAMBER BY DIFFERENTIAL PRESSURE BETWEEN SAID INLET AND OUTLET TOWARDS A SECOND POSITION WHEREIN SAID BY-PASS OPENING IS COMMUNICATED WITH SAID INLET BY SAID BYPASS PASSAGE, ONE OF SAID ORIFICES BEING SPACED WITH RESPECT TO SAID INLET TO CONTINUE COMMUNICATION WITH SAID OUTLET AT SAID SECOND POSITION, THE OTHER OF SAID ORIFICES BEING SPACED TO MOVE INTO PARTIAL REGISTRATION WITH SAID BY-PASS OPENING AS SAID VALVE OPENS SAID BY-PASS PASSAGE, SAID OTHER OF SAID ORIFICES BEING SO LOCATED WITH RESPECT TO SAID BY-PASS PASSAGE IN ITS OPEN POSITION AS TO EFFECT AN ASPIRATING ACTION ON SAID OTHER ORIFICE, THEREBY PRODUCING A DROOPING FLOW CHARACTERISTIC IN SAID FLOW REGULATOR.
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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |