Power plants – Pressure fluid source and motor – Having condition responsive control in a system of distinct...
Patent
1988-06-09
1989-08-29
Look, Edward K.
Power plants
Pressure fluid source and motor
Having condition responsive control in a system of distinct...
60427, 60468, 60494, 212153, 212189, 2807661, F16D 3102
Patent
active
048605395
ABSTRACT:
A vehicle stabilizer apparatus having a plurality of hydraulic stabilizer actuators with each actuator having an integral isolation valve effective to enable operation of a sequentially operable device such as a boom cylinder only after ground-engaging feet associated with the actuators have been brought into firm contact with the ground or other supporting surface. Each actuator is mounted for bodily movement between upper and lower positions on an associated vehicle supported mounting pin. The actuator is caused to move to its upper position when the associated ground-engaging foot engages the ground and through a plunger and plunger spring associated with the isolation valve the position of the actuator is sensed. The isolation valve is in a hydraulic circuit to prevent operation of the boom cylinder unless the actuator is in its upper position.
REFERENCES:
patent: 3362548 (1968-01-01), Cunningham
patent: 3630120 (1971-12-01), Carlson
patent: 3856152 (1974-12-01), Parrett et al.
patent: 4264014 (1981-04-01), Hogg et al.
patent: 4632261 (1986-12-01), Cuhel
Brochure No. C-1-83 of Benton Harbor Engineering, Benton Harbor, Mich. which was published more than a year prior to Jun. 9, 1988, the filing date of this application.
Fairbairn James P.
Jaworski Walter
Parrett John T.
Look Edward K.
Terex Corporation
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