Method of using a hydraulic power unit to control a mechanical j

Details Method of using a hydraulic power unit to control a mechanical j Method of using a hydraulic power unit to control a mechanical j

1984-06-18

1986-01-14

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Miscellaneous

254 8B, 254 89R, B66F 504

Patent

active

045641722

ABSTRACT:
A plurality of extendible jack stands are used in conjunction with, and their operation controlled by, a single power unit. The power unit transports an individual jack stand, positions it underneath a load, and raises or extends it. The jack stand is then locked in its extended position, and the power unit is detached from that jack stand and is then used for transporting, positioning, and raising another jack stand. When the load is to be lowered, the power unit controls the unlocking, lowering, and retraction of the jack stands, one at a time. In this manner a number of jack stands may be placed underneath a load, the load raised, the load later lowered, and the jack stands removed, without any need for the operator himself to place his body underneath the load.

REFERENCES:
patent: 3709467 (1973-01-01), Mann
patent: 4289299 (1981-09-01), Kameda

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