Electro hydrostatic actuator system for retracting/extending landing gear
AssigneeSumitomo Precision Products Co., Ltd.
InventorsTaku KONDO, Shogo HAGIHARA
Life of this patent
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Abstract
An electro hydrostatic actuator system for retracting/extending a landing gear includes a plurality of hydraulic actuators and a plurality of hydraulic supply sources each including a single hydraulic pump and a single electric motor and provided in parallel to each other. In a normal state, the hydraulic supply sources together supply operation oil sequentially to the hydraulic actuators. When any of the hydraulic supply sources is failed, the other hydraulic supply source(s) other than the failed hydraulic supply source supplies operation oil sequentially to the hydraulic actuators.
Claims4
An electro hydrostatic actuator system for retracting/extending a landing gear of an aircraft, comprising:
- a plurality of hydraulic actuators configured to sequentially receive, for operation thereof, a supply of operation oil in retraction or extension of the landing gear;
- and
- a plurality of hydraulic supply sources provided in parallel to each other such that the operation oil is supplied to each hydraulic actuator,
- wherein each hydraulic supply source includes
- a single hydraulic pump configured to discharge the operation oil, and
- a single electric motor configured to drive the hydraulic pump,
- the hydraulic supply sources together supply the operation oil sequentially to the hydraulic actuators in a normal state of the hydraulic supply sources, and
- when at least one of the hydraulic supply sources is failed, at least one hydraulic supply source other than the failed one of the hydraulic supply sources supplies the operation oil sequentially to the hydraulic actuators.
Dependencies are inferred from the claim text.