Patent US3079900A successfully refreshed from Google Patents.
US3079900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid motor
Assignee: Enerpac Tool Group Corp
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Filing: 1961-06-26
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Granted: 1963-03-05
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Expires: 1981-06-26
Abstract
No abstract record available.
Inventors
- 👤 Hunnicutt Wayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:26
CPC Classifications
F; F01; F01B; F01B17/00; F01B17/02; F15; F15B; F15B15/00; F15B15/08; F15B15/14; F15B15/1423; F15B15/1433; F15B15/1447; F15B15/149
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
204 words
A FLUID MOTOR COMPRISING, A BODY HAVING A PISTON CHAMBER FORMED THEREIN, A PISTON RECIPROCABLE WITHIN SAID CHAMBER, A VALVE BLOCK CLOSING AN END OF SAID CHAMBER, A FLUID PRESSURE SUPPLY PASSAGEWAY IN SAID VALVE BLOCK COMMUNICABLE WITH THE ADJACENT END OF SAID CHAMBER, A THROTTLE VALVE NORMALLY CLOSING SAID SUPPLY PASSAGEWAY AND OPERABLE TO OPEN THE SAME AND ESTABLISH DIRECT COMMUNICATION BETWEEN SAID SUPPLY PASSAGEWAY AND SAID CHAMBER, MEANS FORMING AN EXHAUST PASSAGE IN SAID VALVE BLOCK COMMUNICABLE WITH OPPOSITE ENDS OF SAID CHAMBER, A FREELY RECIPROCABLE VALVE IN SAID VALVE BLOCK OPERABLE WHEN SEATED TO CLOSE SAID CHAMBER FROM SAID EXHAUST PASSAGE AND WHEN UNSEATED TO ESTABLISH DIRECT COMMUNICATION BETWEEN SAID CHAMBER AND SAID EXHAUST PASSAGE, SAID PISTON BEING MOVED IN ONE DIRECTION BY FLUID PRESSURE ADMITTED TO SAID CHAMBER WHEN SAID VALVE IS SEATED, ANOTHER PASSAGEWAY COMMUNICABLE WITH AN INTERMEDIATE PORTION OF SAID CHAMBER AND ONE END OF SAID FREELY RECIPROCABLE VALVE DEPENDENT UPON THE POSITION OF SAID PISTON IN SAID CHAMBER FOR CONDUCTING PRESSURIZED FLUID FROM SAID CHAMBER TO SAID VALVE END TO UNSEAT SAID VALVE AND THEREBY OPEN SAID CHAMBER TO SAID EXHAUST PASSAGE, AND MEANS FOR MOVING SAID PISTON IN THE OPPOSITE DIRECTION WHEN SAID VALVE IS UNSEATED.
Claim 2
Dependent Claim
204 words
A FLUID MOTOR COMPRISING, A BODY HAVING A PISTON CHAMBER FORMED THEREIN, A PISTON RECIPROCABLE WITHIN SAID CHAMBER, A VALVE BLOCK CLOSING AN END OF SAID CHAMBER, A FLUID PRESSURE SUPPLY PASSAGEWAY IN SAID VALVE BLOCK COMMUNICABLE WITH THE ADJACENT END OF SAID CHAMBER, A THROTTLE VALVE NORMALLY CLOSING SAID SUPPLY PASSAGEWAY AND OPERABLE TO OPEN THE SAME AND ESTABLISH DIRECT COMMUNICATION BETWEEN SAID SUPPLY PASSAGEWAY AND SAID CHAMBER, MEANS FORMING AN EXHAUST PASSAGE IN SAID VALVE BLOCK COMMUNICABLE WITH OPPOSITE ENDS OF SAID CHAMBER, A FREELY RECIPROCABLE VALVE IN SAID VALVE BLOCK OPERABLE WHEN SEATED TO CLOSE SAID CHAMBER FROM SAID EXHAUST PASSAGE AND WHEN UNSEATED TO ESTABLISH DIRECT COMMUNICATION BETWEEN SAID CHAMBER AND SAID EXHAUST PASSAGE, SAID PISTON BEING MOVED IN ONE DIRECTION BY FLUID PRESSURE ADMITTED TO SAID CHAMBER WHEN SAID VALVE IS SEATED, ANOTHER PASSAGEWAY COMMUNICABLE WITH AN INTERMEDIATE PORTION OF SAID CHAMBER AND ONE END OF SAID FREELY RECIPROCABLE VALVE DEPENDENT UPON THE POSITION OF SAID PISTON IN SAID CHAMBER FOR CONDUCTING PRESSURIZED FLUID FROM SAID CHAMBER TO SAID VALVE END TO UNSEAT SAID VALVE AND THEREBY OPEN SAID CHAMBER TO SAID EXHAUST PASSAGE, AND MEANS FOR MOVING SAID PISTON IN THE OPPOSITE DIRECTION WHEN SAID VALVE IS UNSEATED.
References Cited (Backward Citations)
US1971048A
Cited
FR764509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |