Aeronautics and astronautics – Aircraft control – Specific control connection or actuator
Reexamination Certificate
2005-04-14
2009-10-13
Mansen, Michael R (Department: 3644)
Aeronautics and astronautics
Aircraft control
Specific control connection or actuator
C244S099200, C244S099400, C244S227000, C244S078100, C060S405000
Reexamination Certificate
active
07600715
ABSTRACT:
A backup system is provided that has a local electric motor and pump for some or all of the hydraulic actuators on an aircraft. A local backup hydraulic actuator has two power sources, hydraulic as primary and electrical as backup. During normal operation, the hydraulic actuator receives pressurized fluid from a hydraulic system and the fluid flow to the chambers is controlled by a servo valve. If the hydraulic system fails, the electronic controller detects the failure by observing the signal indicative of the pressure from the pressure sensor, and the controller powers the local hydraulic pump to provide high pressure hydraulic fluid to the hydraulic actuator via the servo valve.
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Mansen Michael R
Michener Joshua J
Nabtesco Corporation
Seed IP Law Group PLLC
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