|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||60/405 ; 60/430 ; 60/452 ; 60/486|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 4 인용 특허 : 0|
An engine-driven pump supplies pressurized hydraulic fluid to vehicle brake and steering circuits. A ground driven variable displacement pump controlled by a control circuit is de-stroked when the engine-driven pump is operational. The variable displacement pump includes a movable piston which divides a bore into a pilot chamber and a pump chamber. An outlet line with a check valve communicates fluid one way from the pump chamber to the vehicle circuits. An inlet line with a check valve communicates fluid one way from a reservoir to the pump chamber. A g...
In a vehicle having a hydraulic function, an engine-driven pump for supplying pressurized hydraulic fluid to the hydraulic function, an ground-driven source of pressurized hydraulic fluid and control means for controlling operation of the ground-driven source, the improvement wherein: the ground-driven source comprises a variable displacement pump, the variable displacement pump comprising a variable stroke cylinder comprising a housing having a bore therein, a piston movable in the bore and cooperating with a wall of the bore to divide the bore into a p...