Patent US3234934A successfully refreshed from Google Patents.
US3234934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid amplifier controlled piston
Assignee: Individual
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Filing: 1965-04-06
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Granted: 1966-02-15
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Expires: 1985-04-06
Abstract
No abstract record available.
Inventors
- 👤 Kenneth E Woodward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:28
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/08; F15B11/15; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2229; Y10T137/224; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86413
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A RECIPROCATING PRESSURE-APPLYING DEVICE COMPRISING A CYLINDER, A PISTON WITHIN SAID CYLINDER, RIGID MEANS COUPLED TO SAID PISTON AND EXTENDING AXIALLY THROUGH ONE END OF SAID CYLINDER, A FLUID AMPLIFIER HAVING A FLUID POWER INLET PORT, FIRST AND SECOND FLUID POWER OUTPUT PORTS, AND FIRST AND SECOND CONTROL PORTS, MEANS INTERCONNECTING SAID PORTS FOR PROVIDING COMMUNICATION THEREBETWEEN, MEANS CONNECTING SAID FIRST FLUID POWER OUTPUT PORT THROUGH THE OTHER END OF SAID CYLINDER, A CLOSED ORIFICE IN SAID CYLINDER COUPLED TO SAID FIRST CONTROL PORT,
Claim 2
Dependent Claim
84 words
A RECIPROCATING PRESSURE-APPLYING DEVICE COMPRISING A CYLINDER, A PISTON WITHIN SAID CYLINDER, RIGID MEANS COUPLED TO SAID PISTON AND EXTENDING AXIALLY THROUGH ONE END OF SAID CYLINDER, A FLUID AMPLIFIER HAVING A FLUID POWER INLET PORT, FIRST AND SECOND FLUID POWER OUTPUT PORTS, AND FIRST AND SECOND CONTROL PORTS, MEANS INTERCONNECTING SAID PORTS FOR PROVIDING COMMUNICATION THEREBETWEEN, MEANS CONNECTING SAID FIRST FLUID POWER OUTPUT PORT THROUGH THE OTHER END OF SAID CYLINDER, A CLOSED ORIFICE IN SAID CYLINDER COUPLED TO SAID FIRST CONTROL PORT,
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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |