Power plants – Pressure fluid source and motor – Condition responsive control of pump or motor displacement
Patent
1984-03-22
1986-11-25
Look, Edward K.
Power plants
Pressure fluid source and motor
Condition responsive control of pump or motor displacement
137385, F16D 3102
Patent
active
046241060
ABSTRACT:
A pressure-compensating hydraulic system is disclosed for preventing unauthorized use of an associated material handling implement. The system includes a variable displacement hydraulic fluid pump, and a load-sensing pressure-compensator for varying the output of the pump responsively to the pressurized fluid demands of the system. In order to prevent unauthorized use of the associated implement, the invention contemplates the provision of an override mechanism for negating the demand-responsive characteristics of the system. In this manner, a movable member of the implement, such as one of its stabilizers or its loader bucket, is positioned so as to immobilize the implement, with the member thus maintained in this position since the system will not respond to the demand for pressurized fluid to move the member from this immobilizing condition.
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patent: 4545459 (1985-10-01), Rochman
Brown Thomas R.
Mickelson Roger D.
J. I. Case Company
Look Edward K.
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