US 11,852,172 B2
Solenoid driven actuator systems
Morgan O'Rorke, West Hartford, CT (US); Steve Doerner, Enfield, CT (US); and Ryan Susca, Windsor, CT (US)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Feb. 18, 2022, as Appl. No. 17/675,551.
Prior Publication US 2023/0265867 A1, Aug. 24, 2023
Int. Cl. F15B 13/044 (2006.01); F15B 13/02 (2006.01)
CPC F15B 13/044 (2013.01) [F15B 13/02 (2013.01); F15B 2211/405 (2013.01); F15B 2211/426 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A solenoid driven actuator system, the system comprising:
a first solenoid having at least one pressure input and a pressure outlet downstream from the at least one pressure input;
a second solenoid having at least one pressure input and a pressure outlet downstream from the at least one pressure input;
a pressure-switching valve operatively coupled to the first and second solenoids; and
an actuator valve operatively coupled to the pressure outlet of the second solenoid, wherein the pressure-switching valve includes a first side, a second side and a slidable spool therebetween; and wherein the first side of the pressure-switching valve is in fluid communication with a first pressure source through a first side pressure port.
 
11. The method as recited in claim 10, wherein controlling the actuator valve with the output of the second solenoid includes controlling the actuator valve with the output of the second solenoid when the first solenoid is in the failure mode to the high pressure by providing the high pressure from the first solenoid to the pressure-switching valve thereby exposing a first inlet of the second solenoid to the low pressure source via the pressure-switching valve.