发明授权
- 专利标题： Lift system
- 专利标题（中）： 电梯系统
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申请号： US746843申请日： 1985-06-20
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公开(公告)号： US4655039A公开(公告)日： 1987-04-07
- 发明人: Paul P. McCabe , James Woolston
- 申请人： Paul P. McCabe , James Woolston
- 申请人地址： NY Greene
- 专利权人： The Raymond Corporation
- 当前专利权人： The Raymond Corporation
- 当前专利权人地址： NY Greene
- 主分类号： B66F9/20
- IPC分类号： B66F9/20 ; F16D31/00
摘要：
A hydraulic lifting and lowering system for battery-powered lift trucks includes an electronic control system which reduces or limits operator selected lifting commands in accordance with the current being drawn by an electric motor connected to drive a variable-displacement pump, and in accordance with the state-of-charge of the vehicle battery, to control a proportional valve which meters fluid flow to a lift cylinder.
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