Jacking apparatus adjustable for alignment variations

Details Jacking apparatus adjustable for alignment variations Jacking apparatus adjustable for alignment variations

1981-12-17

1984-10-23

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Step-by-step traveling bar

Pawl actuated

B66F 104

Patent

active

044783892

ABSTRACT:
A jacking apparatus for application of force to at least two anchor points for movement of a load. The force is transmitted through fluid in at least two equalizing cylinders after which it is transmitted to the anchor points. The fluid pressure in each of the equalizing cylinders is limited to a predetermined value to provide equal distribution of the load between all of the anchor points to which the jacking apparatus is or should be engaged.

REFERENCES:
patent: 2163959 (1939-06-01), Nilson
patent: 3659823 (1972-05-01), Griffin
patent: 3986246 (1976-10-01), Gemmill
patent: 4007915 (1977-02-01), Chambers
patent: 4014266 (1977-03-01), Naslund et al.
patent: 4030699 (1977-06-01), Heinke
patent: 4212450 (1980-07-01), Lambert
patent: 4234163 (1980-11-01), Kormendy

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