Electro hydrostatic actuator with swash plate pump

Details Electro hydrostatic actuator with swash plate pump Electro hydrostatic actuator with swash plate pump

2011-08-02

2011-08-02

Leslie, Michael (Department: 3745)

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

C060S476000

Reexamination Certificate

active

07987668

ABSTRACT:
A fluid pressure actuator includes an output cylinder, a fluid pressure pump, an electric motor, a first output cylinder passage, a second output cylinder passage, a return passage and a swash plate control cylinder. The output cylinder includes a first output cylinder chamber, a second output cylinder chamber and an output piston arranged between the first output cylinder chamber and the second output cylinder chamber. The fluid pressure pump includes a first supply and discharge port, a second supply and discharge port and a swash plate for changing displacement of the fluid pressure pump. The electric motor drives the fluid pressure pump. The first output cylinder passage connects the first output cylinder chamber and the first supply and discharge port. The second output cylinder passage connects the second output cylinder chamber and the second supply and discharge port.

REFERENCES:
patent: 4510750 (1985-04-01), Izumi et al.
patent: 4756157 (1988-07-01), Appel
patent: 5907952 (1999-06-01), Akasaka et al.
patent: 6427441 (2002-08-01), Wustefeld et al.
patent: 8-326705 (1996-12-01), None
patent: 2001-295802 (2001-10-01), None
patent: 2005-36870 (2005-02-01), None
patent: 2005-240974 (2005-09-01), None
patent: 2006-300187 (2006-11-01), None
Japanese Office Action issued Apr. 22, 2009 for Japanese Application No. 2007-091407 w/partial translation.

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