发明授权
- 专利标题: Power control winch
- 专利标题(中): 电源控制
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申请号: US3756564D申请日: 1970-10-05
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公开(公告)号: US3756564A公开(公告)日: 1973-09-04
- 发明人: MURRAY J , CHRISTISON S , BONAR W
- 申请人: GEARMATIC CO LTD
- 专利权人: Gearmatic Co Ltd
- 当前专利权人: Gearmatic Co Ltd
- 优先权: US7797770 1970-10-05
- 主分类号: B66D1/14
- IPC分类号: B66D1/14 ; B66D5/26 ; B66D1/00
摘要:
A winch having an integral control system wherein the clutch and brake mechanism are hydraulically actuated and the hydraulic actuating system is positioned in the winch housing. The system includes the oil supply, the control valve, the hydraulic pump and an accumulator. The pump is self-compensating and is mounted to be continually actuated by a shaft in the drive train to the winch drum. To reduce the volume of hydraulic fluid normally required in a hydraulic system and to improve the reliability, the valve is a unique no-leak type with the inlet through a bore in the valve spool and an outlet located along only one side of the spool and the valve is used in conjunction with an accumulator which allows release of the brake after shut down of the drive train. The brake mechanism comprises multi-wrap brake bands which are spring-actuated and hydraulically released, the multi-wrap enables relatively high braking force produced by a minimal spring actuating force.
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