US3203319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal lock for hydraulic actuator
Assignee: Lockheed Martin Corp
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Filing: 1963-02-07
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Granted: 1965-08-31
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Expires: 1983-02-07
Abstract
No abstract record available.
Inventors
- 👤 William C Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:24
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/20; F15B15/26; F15B15/261
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A HYDRAULIC ACTUATOR COMPRISING: A CYLINDER BARREL; A PISTON ASSEMBLY MOUNTED FOR EXTENSION AND RETRACTION WITHIN SAID CYLINDER BARREL; PISTON ASSEMBLY MOUNTED LOCK MEANS FOR LOCKING SAID PISTON ASSEMBLY WITH RESPECT TO SAID CYLINDER BARREL AT A PREDETERMINED RELATIVE POSITION; A FIRST CONTROL MEANS ARRANGEMENT MOVABLE RELATIVE TO THE PISTON ASSEMBLY AND ACTIVATED BY PRESSURIZED FLUID FOR PREVENTING BIASING OF SAID LOCK MEANS TOWARD LOCKED POSITION DURING EXTENSION OF SAID PISTON ASSEMBLY; AND A SECOND CONTROL MEANS ARRANGEMENT ACTIVATED BY PRESSURIZED FLUID FOR PREVENTING BIASING OF SAID LOCK MEANS TOWARD LOCKED POSITION DURING RETRACTION OF SAID PISTON ASSEMBLY.
Claim 2
Dependent Claim
98 words
A HYDRAULIC ACTUATOR COMPRISING: A CYLINDER BARREL; A PISTON ASSEMBLY MOUNTED FOR EXTENSION AND RETRACTION WITHIN SAID CYLINDER BARREL; PISTON ASSEMBLY MOUNTED LOCK MEANS FOR LOCKING SAID PISTON ASSEMBLY WITH RESPECT TO SAID CYLINDER BARREL AT A PREDETERMINED RELATIVE POSITION; A FIRST CONTROL MEANS ARRANGEMENT MOVABLE RELATIVE TO THE PISTON ASSEMBLY AND ACTIVATED BY PRESSURIZED FLUID FOR PREVENTING BIASING OF SAID LOCK MEANS TOWARD LOCKED POSITION DURING EXTENSION OF SAID PISTON ASSEMBLY; AND A SECOND CONTROL MEANS ARRANGEMENT ACTIVATED BY PRESSURIZED FLUID FOR PREVENTING BIASING OF SAID LOCK MEANS TOWARD LOCKED POSITION DURING RETRACTION OF SAID PISTON ASSEMBLY.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |