Method of lifting or lowering an object by means of a plurality

Details Method of lifting or lowering an object by means of a plurality Method of lifting or lowering an object by means of a plurality

1976-05-24

1977-10-11

Whitehead, Harold D.

Implements or apparatus for applying pushing or pulling force

Step-by-step traveling bar

B66F 100

Patent

active

040531384

ABSTRACT:
A method of lifting or lowering of an object by means of a plurality of climbing jacks capable to climb each along a climb rod. The method comprises the steps of staying the rods slidably by means of associated support structures, arranging each rod on a jack, which jacks are held separated from each other from a load point of view, and adjusting the height position of the climb rods in relation to each other by means of the respective jack in order to minimize the stresses in the object caused by the lifting operation.

REFERENCES:
patent: 289644 (1883-12-01), Goodridge
patent: 2380692 (1945-07-01), Gunnison
patent: 3065573 (1962-11-01), Goldberg
patent: 3289868 (1966-12-01), Miller et al.
patent: 3327997 (1967-06-01), Zenke

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