Electric actuators专利检索- 制动元件与轮缘鼓轮或类似元件的外圆周相互作用的制动器的应用或配置专利检索查询-专利查询网

Electric actuators
申请号	EP84303104	申请日	1984-05-09	公开(公告)号	EP0125872A3	公开(公告)日	1985-05-02
申请人	WESTINGHOUSE BRAKE AND SIGNAL COMPANY LIMITED;			发明人	Wickham, David John; Washbourn, Jack; Cogan, Howard Frederick;
摘要	An electric actuator having an output member movable from a first variable position to a second variable position; an electric motor operable to control a spring system to exert an output force on the output member when in its second position; means for generating an electrical signal when the output member is about to leave the second position as it returns to the first position; and a motor-control electrical circuit which recognises the generation of the electrical signal and thereafter operates the electric motor to a pre-determined degree to move the output member a corresponding pre- determined distance back to the first position so that there is preserved a substantially constant distance between the first and second positions.
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