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专利名称：Hydraulically-actuated system having a
variable delivery fixed displacement pump
发明人：Michael D. Anderson,Dennis H.
Gibson,Michael E. Pickell,Jerry A.Wear,Matthew D. Friede
申请号：US09414798申请日：19991008公开号：US06216670B1公开日：20010417
专利附图：
摘要：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 areaand a low pressure area. A control valve is attached to the pump housing and moveablebetween a first position in which the piston displaces fluid in a first proportion betweenthe high pressure area and the low pressure area, and a second position in which thepiston displaces fluid in a second proportion between the high pressure area and the lowpressure area. At least one hydraulically-actuated device is connected to the highpressure area of the pump. A source of low pressure fluid is connected to the lowpressure area of the pump. An electronic control module is in communication with andcapable of controlling the position of the control valve.
申请人：CATERPILLAR INC.
代理人：Michael B. McNeil
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