US3272090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fail-safe hydraulic actuators
Assignee: Allard Way Holdings Ltd
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Filing: 1964-09-23
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Granted: 1966-09-13
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Expires: 1984-09-23
Abstract
No abstract record available.
Inventors
- 👤 Ellis Stafford Malcolm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:14
CPC Classifications
B; B64; B64C; B64C13/00; B64C13/24; B64C13/26; B64C13/28; B64C13/341; B64C13/38; B64C13/40; B64C13/42; B64C13/50; B64C13/505; F; F15; F15B; F15B18/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PARALLEL REDUNDANT HYDRAULIC ACTUATOR SYSTEM COMPRISING THREE OR MORE CONTROL PATHS EACH INCLUDING AN ACTUATOR UNITS WHICH INCLUDES MEANS WHEREBY ANY ONE OF THE ACTUATOR UNITS MAY BE DISENGAGED AS THE RESULT OF A MALFUNCTION OR OTHER EVENT, LATCHING MEANS INCLUDING A PLURALITY OF MEMBERS EACH UNPOSITIVELY INTERLOCKED WITH AN ASSOCIATED ONE OF SAID ACTUATORS, SAID MEMBERS BEING MOVABLE TO UNLOCK FROM ITS ASSOCIATED UNIT UPON DISENGAGEMENT THEREOF, AND MEANS FOR TRANSMITTING MOVEMENT OF ONE MEMBER TO THE OTHER MEMBERS AND EFFECTIVE UPON THE DISENGAGEMENT OF THE LAST OF A PREDETERMINED NUMBER OF ACTUATOR UNITS TO MOVE SAID MEMBERS TO POSITIVELY INTERLOCK WITH AT LEAST TWO REMAINING UNITS.
Claim 2
Dependent Claim
109 words
A PARALLEL REDUNDANT HYDRAULIC ACTUATOR SYSTEM COMPRISING THREE OR MORE CONTROL PATHS EACH INCLUDING AN ACTUATOR UNITS WHICH INCLUDES MEANS WHEREBY ANY ONE OF THE ACTUATOR UNITS MAY BE DISENGAGED AS THE RESULT OF A MALFUNCTION OR OTHER EVENT, LATCHING MEANS INCLUDING A PLURALITY OF MEMBERS EACH UNPOSITIVELY INTERLOCKED WITH AN ASSOCIATED ONE OF SAID ACTUATORS, SAID MEMBERS BEING MOVABLE TO UNLOCK FROM ITS ASSOCIATED UNIT UPON DISENGAGEMENT THEREOF, AND MEANS FOR TRANSMITTING MOVEMENT OF ONE MEMBER TO THE OTHER MEMBERS AND EFFECTIVE UPON THE DISENGAGEMENT OF THE LAST OF A PREDETERMINED NUMBER OF ACTUATOR UNITS TO MOVE SAID MEMBERS TO POSITIVELY INTERLOCK WITH AT LEAST TWO REMAINING UNITS.
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |