Claims
- 1. A winch having an operating reaction comprising:
- a means for winding a cable to lift a load;
- a power source providing power to said means for winding;
- a control valve which comprises means for controlling the power provided to said means for winding;
- an operating lever which comprises means for controlling said control valve;
- a load detection means for sensing the weight of said load and producing a first output indicative of said weight;
- at least one lever operating amount detection means for detecting the movement of said operating lever and providing a second output indicative of said movement;
- a controller receiving said first and second outputs and comprises means to produce a third output which is a function of both the load and the movement of the operating lever;
- operating reaction means responsive to said third output to provide a reaction force against the movement of the operating lever so as to provide an operator with a feeling of the load and also reduce the reaction force near a rest position of the operating lever to permit small movements of the operating lever without the reaction force.
- 2. A winch having an operating reaction according to claim 1, wherein said operating reaction means comprises a motor.
- 3. A winch have an operating reaction according to claim 1, wherein said lever operating amount detection means comprises a potentiometer.
- 4. A winch having an operating reaction according to claim 1, wherein said operating reaction means includes at least one hydraulic cylinder.
Priority Claims (1)
Number |
Date |
Country |
Kind |
63-50015 |
Mar 1988 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 07/317,996, filed on Mar. 2, 1989, now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (3)
Number |
Date |
Country |
2152133 |
Feb 1973 |
DEX |
2158124 |
Jun 1973 |
FRX |
62-14077 |
Apr 1987 |
JPX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
317996 |
Mar 1989 |
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