US 12,435,740 B2
Hydraulic force fight mitigation
Michael L. Hahn, Fort Collins, CO (US)
Assigned to Woodward, Inc., Fort Collins, CO (US)
Filed by Woodward, Inc., Fort Collins, CO (US)
Filed on Nov. 10, 2022, as Appl. No. 17/984,976.
Claims priority of provisional application 63/264,002, filed on Nov. 12, 2021.
Prior Publication US 2023/0151829 A1, May 18, 2023
Int. Cl. F15B 11/22 (2006.01); F15B 18/00 (2006.01); B64C 13/42 (2006.01); F15B 13/02 (2006.01); F15B 13/04 (2006.01); F15B 13/043 (2006.01); F15B 15/14 (2006.01); F15B 20/00 (2006.01); F15B 21/08 (2006.01)
CPC F15B 11/22 (2013.01) [F15B 18/00 (2013.01); B64C 13/42 (2013.01); F15B 13/02 (2013.01); F15B 2013/0409 (2013.01); F15B 2013/0412 (2013.01); F15B 13/043 (2013.01); F15B 15/1404 (2013.01); F15B 20/008 (2013.01); F15B 21/087 (2013.01); F15B 2211/3133 (2013.01); F15B 2211/327 (2013.01); F15B 2211/634 (2013.01); F15B 2211/6656 (2013.01); F15B 2211/7107 (2013.01); F15B 2211/782 (2013.01); F15B 2211/8636 (2013.01); F15B 2211/8757 (2013.01)] 8 Claims
OG exemplary drawing
 
1. 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.