Earth working – Automatic power control – Land leveller type
Patent
1996-01-29
1997-04-22
Melius, Terry Lee
Earth working
Automatic power control
Land leveller type
172 7, 172 12, 36442407, A01C 500, A01B 63112
Patent
active
056222262
ABSTRACT:
A method is provided for controlling the bounce of a work implement attached to a machine having an electro-hydraulic system. The method comprises the steps of sensing the operating pressure in an actuator arrangement connected between the frame of the machine and the work implement, monitoring an upper and a lower operating pressure level in the actuator arrangement to establish a threshold pressure level and altering the pressure level in the actuator arrangement in the event the threshold level is exceeded to re-establish the threshold pressure level. Once the original threshold level is attained, the system is reset. This effectively eliminates the bounce of the work implement at the initial onset of the bounce and resets the system to react to future bounces.
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"System Type KT For Cat", Hydroscand, Ledningskomponenter For Hydraulik, Sweden. (May 1990).
Cline Michael I.
Hausman Dennis J.
Krone John J.
Burrows J. W.
Caterpillar Inc.
Melius Terry Lee
Pezzuto Robert
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