发明名称 |
Fork lift truck speed control dependent upon fork elevation |
摘要 |
A speed control circuit is provided for a lift truck which is driven by an electric truck drive motor powered from a power source through a motor controller. The motor controller is responsive to a power control signal generated by summing a speed sensor signal, which is derived by comparing a tachometer signal with a speed selection signal. A fork height sensor provides a fork height signal which is used to limit the maximum level of the speed control signal. A safety circuit monitors operation of the speed control circuit and disconnects the circuit from the motor controller upon occurrence of a malfunction.
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申请公布号 |
US4265337(A) |
申请公布日期 |
1981.05.05 |
申请号 |
US19790057771 |
申请日期 |
1979.07.16 |
申请人 |
CROWN CONTROLS CORPORATION |
发明人 |
DAMMEYER, NED E. |
分类号 |
B60K31/00;B66F17/00;(IPC1-7):B66F9/06;G05B1/06;H02P5/06 |
主分类号 |
B60K31/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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