US3228307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balance piston with directional load equalizer
Assignee: Ling Temco Vought Inc
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Filing: 1964-06-11
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Granted: 1966-01-11
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Expires: 1984-06-11
Abstract
No abstract record available.
Inventors
- 👤 Joseph T Dillard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:04
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/20; F15B15/26; F15B15/261
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A HYDRAULIC ACTUATOR COMPRISING A CYLINDER, AN ACTUATOR PISTON MOVABLE WITHIN SAID CYLINDER BETWEEN AN EXTENDED POSITION AND A RETRACTED POSITION, CYLINDRICAL LOCKING CAM MEANS MOUNTED IN SAID CYLINDER ADJACENT SAID RETRACTED POSITION, FINGER MEANS CARRIED BY SAID ACTUATOR PISTON AND RETAININGLY ENGAGEABLE WITH SAID LOCKING CAM WHEN SAID ACTUATOR PISTON IS IN SAID RETRACTED POSITION, LOCKING PISTON MEANS HAVING FRONT AND REAR SURFACES AND FORMED WITH A REARWARDLY EXTENDING PROJECTION AND SLIDABLY MOUNTED WITHIN SAID CAM MEANS, RESILIENT MEANS URGING SAID LOCKING PISTON TOWARD A FINGER ENGAGING POSITION TO RETAIN SAID FINGER MEANS IN LOCKING ENGAGEMENT WITH SAID CAM, BALANCE PISTON MEANS SLIDABLY MOUNTED ON SAID PROJECTION AND FORMED WITH AN EFFECTIVE AREA EQUAL TO THAT OF SAID LOCKING PISTON, MEANS FOR SUPPLYING FLUID PRESSURE BETWEEN SAID ACTUATOR PISTON AND SAID LOCKING PISTON AND TO THE REAR SURFACE OF SAID BALANCE PISTON, AND MEANS FOR SUPPLYING FLUID PRESSURE BETWEEN SAID CYLINDER AND SAID ACTUATOR PISTON AND BETWEEN SAID LOCKING PISTON AND SAID BALANCE PISTON.
Claim 2
Dependent Claim
165 words
A HYDRAULIC ACTUATOR COMPRISING A CYLINDER, AN ACTUATOR PISTON MOVABLE WITHIN SAID CYLINDER BETWEEN AN EXTENDED POSITION AND A RETRACTED POSITION, CYLINDRICAL LOCKING CAM MEANS MOUNTED IN SAID CYLINDER ADJACENT SAID RETRACTED POSITION, FINGER MEANS CARRIED BY SAID ACTUATOR PISTON AND RETAININGLY ENGAGEABLE WITH SAID LOCKING CAM WHEN SAID ACTUATOR PISTON IS IN SAID RETRACTED POSITION, LOCKING PISTON MEANS HAVING FRONT AND REAR SURFACES AND FORMED WITH A REARWARDLY EXTENDING PROJECTION AND SLIDABLY MOUNTED WITHIN SAID CAM MEANS, RESILIENT MEANS URGING SAID LOCKING PISTON TOWARD A FINGER ENGAGING POSITION TO RETAIN SAID FINGER MEANS IN LOCKING ENGAGEMENT WITH SAID CAM, BALANCE PISTON MEANS SLIDABLY MOUNTED ON SAID PROJECTION AND FORMED WITH AN EFFECTIVE AREA EQUAL TO THAT OF SAID LOCKING PISTON, MEANS FOR SUPPLYING FLUID PRESSURE BETWEEN SAID ACTUATOR PISTON AND SAID LOCKING PISTON AND TO THE REAR SURFACE OF SAID BALANCE PISTON, AND MEANS FOR SUPPLYING FLUID PRESSURE BETWEEN SAID CYLINDER AND SAID ACTUATOR PISTON AND BETWEEN SAID LOCKING PISTON AND SAID BALANCE PISTON.
References Cited (Backward Citations)
US2297902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |