Stopping apparatus and method for oil pump

Details Stopping apparatus and method for oil pump Stopping apparatus and method for oil pump

2007-06-05

2007-06-05

Kershteyn, Igor (Department: 3745)

Power plants

Pressure fluid source and motor

Condition responsive control of or by input to input pump...

C060S441000

Reexamination Certificate

active

11056162

ABSTRACT:
In stopping apparatus and method for an oil pump, which are applied to a hydraulic actuator that works based on a hydraulic pressure derived from the oil pump driven by a motor, a backward rotation of the oil pump is prevented by resisting a remaining pressure that is acting on the oil pump from the hydraulic actuator after the hydraulic actuator is deactivated. A one-way clutch disposed on an oil pump drive train between the motor and the oil pump mechanically prevents the backward rotation of the oil pump. Moreover, in order to prevent the backward rotation, a controller of the stopping apparatus gradually decreases the rotation of the motor after the hydraulic actuator is deactivated, and eliminates the remaining pressure within the hydraulic actuator while decreasing the rotation of the motor.

REFERENCES:
patent: 2178305 (1939-10-01), Smaltz et al.
patent: 5794440 (1998-08-01), Lisniansky
patent: 5845493 (1998-12-01), Schiffer
Mechanical Engineering Basic Course 18 Hydraulic Engineering (SI Units Edition), by Asakura Shoten Co., Ltd., Second Edition, Apr. 2003, p. 97.

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