Jacking apparatus having a fast repositioning stroke
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United States of America Patent
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-
Mar 26, 1985
Grant Date -
N/A
app pub date -
Dec 17, 1981
filing date -
Dec 17, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A jacking apparatus and method for effecting movement of loads. At least two double-acting hydraulic cylinders including a first and a second cylinder arranged in tandem provide increased force for a power stroke of the apparatus. Hydraulic fluid pressure is provided at a predetermined flow rate to the group of hydraulic cylinders. Substantially all of the predetermined flow rate of hydraulic fluid is routed to the first hydraulic cylinder to provide increased speed for a repositioning stroke of the apparatus.
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