Patent US2560466A successfully refreshed from Google Patents.
US4447769A
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Redundant actuation system
Assignee: Allard Way Holdings Ltd
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Filing: 1982-01-19
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Granted: 1984-05-08
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Expires: 2002-01-19
Abstract
Abstract A redundant actuator system in which some of the sub-actuators have a lower force capability than the other sub-actuators. The lower force capability sub-actuators are controlled by a common electrical control circuit while the other sub-actuators are each independently controlled by separate control circuits. A plurality of hydraulic supplies power the sub-actuators, each supply powering one lower force capability sub-actuator, and at least one other sub-actuator.
Inventors
- 👤 John M. Corney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:17
CPC Classifications
G; G05; G05B; G05B9/00; G05B9/02; G05B9/03; G05D; G05D1/00; G05D1/0055; G05D1/0077; G05D3/00; G05D3/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
64 words
A redundant actuator system comprising: a first plurality of sub-actuators in which some sub-actuators have a lower force capability than the remaining sub-actuator(s); and a second plurality of electrical control circuits which control the sub-actuators, said sub-actuators with the lower force capability being controlled by a common single electrical control circuit, the remaining sub-actuators being each controlled by a respective independent electrical control circuit.
Claim 2
Dependent Claim
64 words
A redundant actuator system comprising: a first plurality of sub-actuators in which some sub-actuators have a lower force capability than the remaining sub-actuator(s); and a second plurality of electrical control circuits which control the sub-actuators, said sub-actuators with the lower force capability being controlled by a common single electrical control circuit, the remaining sub-actuators being each controlled by a respective independent electrical control circuit.
Claim 3
Dependent Claim
45 words
A redundant actuator system according to claim 1 in which the sub-actuators are electro-hydraulic subactuators, and there are provided a plurality of hydraulic supplies for powering the sub-actuators, each supply powering at least one lower force capacility sub-actuator and at least one said remaining sub-actuator.
Claim 4
Dependent Claim
66 words
A redundant actuator system according to claim 2 in which there are four sub-actuators, two of which have a lower force capability than the other two sub-actuators, one of the sub-actuators of lower force capability and one said other sub-actuator being powered by a first hydraulic supply, and the other sub-actuator of lower force capability and the remaining sub-actuator being powered by a second hydraulic supply.
Claim 5
Dependent Claim
31 words
A redundant actuator system according to claim 3 in which said two sub-actuators of lower force capability suitably have equal force capabilities which are half that of the other two sub-actuators.
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) | 1987-05-08 | 1987-11-07 | 1988-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-08 | 1991-11-07 | 1992-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-08 | 1995-11-07 | 1996-05-08 | $7700.00 | Window Closed / Lapsed |