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US 12,435,740 B2Granted
Hydraulic force fight mitigation
AssigneeWoodward, Inc.
InventorMichael L. Hahn
Life of this patent
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Abstract
The subject matter of this specification can be embodied in, among other things, a method that includes controlling, by a first fluid valve, a first fluid flow to a first fluid actuator, actuating, by the first fluid actuator, an output, controlling, by a second fluid valve, a second fluid flow to a second fluid actuator, and actuating, by the second fluid actuator, the output.
Claims8
A fluid actuator system comprising:
- a first fluid actuator configured to actuate an output and comprising a first fluid chamber and a second fluid chamber;
- a second fluid actuator operating in parallel with the first fluid actuator and configured to redundantly actuate, with the first fluid actuator, the output, the second fluid actuator comprising a third fluid chamber and a fourth fluid chamber;
- a first fluid valve configured to control a first fluid flow to the first fluid actuator, the first fluid valve comprising a first valve body configured to permit the first fluid flow to the first fluid chamber in a first configuration, permit the first fluid flow to the second fluid chamber in a second configuration, and block the first fluid flow to the first fluid chamber and the second fluid chamber in a third configuration;
- and
- a second fluid valve configured to control a second fluid flow to the second fluid actuator, the second fluid valve comprising a second valve body configured to permit the second fluid flow to the third fluid chamber in the first configuration, permit the second fluid flow to the fourth fluid chamber in the second configuration, and is substantially unblocked and offers substantially no fluidic blocking action to-permit the second fluid flow to the third fluid chamber and the fourth fluid chamber in the third configuration.
2 more elements
Dependencies are inferred from the claim text.