초록 ▼

A hydraulically-actuated system includes a fixed displacement pump with at least one piston that reciprocates in a pump housing that defines a high pressure area and a low pressure area. A control valve is attached to the pump housing and moveable between a first position in which the piston displac

A hydraulically-actuated system includes a fixed displacement pump with at least one piston that reciprocates in a pump housing that defines a high pressure area and a low pressure area. A control valve is attached to the pump housing and moveable between a first position in which the piston displaces fluid in a first proportion between the high pressure area and the low pressure area, and a second position in which the piston displaces fluid in a second proportion between the high pressure area and the low pressure area. At least one hydraulically-actuated device is connected to the high pressure area of the pump. A source of low pressure fluid is connected to the low pressure area of the pump. An electronic control module is in communication with and capable of controlling the position of the control valve.

대표청구항 ▼

[ What is claimed is:] [1.]1. A hydraulically actuated system comprising:a fixed displacement pump with at least one piston defining an internal passage and that reciprocates in a pump housing which defines a high pressure area and a low pressure area;a control valve attached to said pump housing an

[ What is claimed is:] [1.]1. A hydraulically actuated system comprising:a fixed displacement pump with at least one piston defining an internal passage and that reciprocates in a pump housing which defines a high pressure area and a low pressure area;a control valve attached to said pump housing and being moveable between a first position in which said piston displaces fluid in a first proportion between said high pressure area and said low pressure area, and a second position in which said piston displaces fluid in a second proportion between said high pressure area and said low pressure area;a hydraulically actuated device fully connected to said high pressure area of said fixed displacement pump;a source of low pressure fluid connected to said low pressure area of said pump;an electronic control module in communication with and capable of controlling a position of said control valve; anda spring operably positioned to bias said control valve toward a position of which said piston displaces a majority of said fluid into said low pressure area.