Patent US2053841A successfully refreshed from Google Patents.
Patent US3259308A successfully refreshed from Google Patents.
US3259308A
Expired / Lapsed
US
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Induction methods and apparatus
Assignee: Individual
•
Filing: 1964-09-11
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Granted: 1966-07-05
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Expires: 1984-09-11
Abstract
No abstract record available.
Inventors
- 👤 De Witt C Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:42
CPC Classifications
F; F04; F04B; F04B13/00; F04B13/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN APPARATUS FOR INDUCING A FLUID INTO CYLINDER HAVING A RECIPROCATING PISTON LOCATED THEREIN AND CONTAINING A FLUID UNDER PRESSURE, THE IMPROVEMENT COMPRISING: FLUID RESERVOIR MEANS; MEANS FORMING A FLOW PASSAGEWAY CONNECTING SAID RESERVOIR AND CYLINDER; PRESSURE-RESPONSIVE VALVE MEANS OPERABLE LOCATED IN SAID FLOW PASSAGEWAY ARRANGED TO PERMIT FLOW FROM SAID RESERVOIR TO SAID CYLINDER AND TO PREVENT FLOW IN THE OPPOSITE DIRECTION; MEANS ON THE PISTON FOR INTERMITTENTLY ISOLATING SAID PASSAGEWAY ADJACENT THE CYLINDER AND FOR INTERMITTENTLY LOWERING THE PRESSURE IN THE ISOLATED PORTION OF SAID PASSAGEWAY, WHEREBY SAID VALVE MEANS WILL OPEN UPON THE LOWERING OF THE PRESSURE IN SAID PASSAGEWAY, THEREBY INDUCING FLUID FLOW FROM SAID RESERVOIR TO THE CYLINDER.
Claim 2
Dependent Claim
113 words
IN APPARATUS FOR INDUCING A FLUID INTO CYLINDER HAVING A RECIPROCATING PISTON LOCATED THEREIN AND CONTAINING A FLUID UNDER PRESSURE, THE IMPROVEMENT COMPRISING: FLUID RESERVOIR MEANS; MEANS FORMING A FLOW PASSAGEWAY CONNECTING SAID RESERVOIR AND CYLINDER; PRESSURE-RESPONSIVE VALVE MEANS OPERABLE LOCATED IN SAID FLOW PASSAGEWAY ARRANGED TO PERMIT FLOW FROM SAID RESERVOIR TO SAID CYLINDER AND TO PREVENT FLOW IN THE OPPOSITE DIRECTION; MEANS ON THE PISTON FOR INTERMITTENTLY ISOLATING SAID PASSAGEWAY ADJACENT THE CYLINDER AND FOR INTERMITTENTLY LOWERING THE PRESSURE IN THE ISOLATED PORTION OF SAID PASSAGEWAY, WHEREBY SAID VALVE MEANS WILL OPEN UPON THE LOWERING OF THE PRESSURE IN SAID PASSAGEWAY, THEREBY INDUCING FLUID FLOW FROM SAID RESERVOIR TO THE CYLINDER.
References Cited (Backward Citations)
US1840091A
Cited
US2642719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |