Gripping jack system

Details Gripping jack system Gripping jack system

1981-02-20

1983-09-20

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Step-by-step traveling bar

Clutch actuated

405228, B66F 108

Patent

active

044051158

ABSTRACT:
A jack usable for leveling a marine platform jacket by lifting a tubular leg or pile guide relative to a pile extending upwardly therethrough includes a gripping unit having slips which engage and grip the pile and which in a predetermined elevated condition of the tubular member are engaged by that member and urged axially thereby in a grip tightening direction acting to positively lock the gripping unit against movement either upwardly or downwardly relative to the pile.

REFERENCES:
patent: 3007317 (1961-11-01), Suderow
patent: 3008691 (1961-11-01), Steele et al.
patent: 3096075 (1963-07-01), Brown
patent: 3495806 (1970-02-01), Sutton
patent: 3598369 (1971-08-01), Yielding
patent: 3804369 (1974-04-01), Sutton
patent: 3889926 (1975-06-01), Ahlgren
patent: 4030698 (1977-06-01), Hansen
patent: 4367056 (1983-01-01), Seneviratne

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