A hydraulic valve manifold 3000 for a hydraulic actuator 120 is provided. The hydraulic valve manifold 3000 comprises: a hydraulic fluid input line 701; a hydraulic fluid return line 702; a pressurisation line 703, 704 for connection to the hydraulic actuator; a command input line 707 for receiving pressurised hydraulic fluid from a command manifold for the hydraulic actuator; and a positioner valve 3100 with a first isolation position, a second actuator pressurisation position and a third command position. The invention also provides an aircraft landing gear drive system, a method of operating a hydraulic valve manifold and a method of operating an aircraft landing gear drive system.
A Hydraulic Valve Manifold
2022-03-23
Patent
Electronic Resource
English