Apparatus for obtaining substantially equal steplength of each jack in a group of pressure fluid operated climbing jacks
AssigneePaul Anderson Industrier AB
InventorArne Mattson
Life of this patent
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Abstract
An apparatus for obtaining substantially equal step length of each jack in a group of pressure fluid operated climbing jacks working on a common object for lifting or lowering it. The apparatus comprises at least one compensation jack associated with each climbing jack. The compensation jacks are arranged to transfer substantially the same load as the respective associated climbing jack and to be actuated when the climbing jack has carried out a full stroke without reaching the intended step length, in order thereby to effect a complementary movement of the load.
Claims5
In an apparatus for obtaining substantially equal step lengths in a group of pressure fluid operated climbing jacks having pressure cylinders, said climbing jacks used for lifting or lowering a common object, the improvement comprising at least one compensating jack and having a pressure cylinder, said compensation jack in a load transfer relationship with each climbing jack, means to transfer substantially the load to the associated climbing jack from the compensating jack, means to actuate said compensating jack when the climbing jack has carried out a full stroke without reaching said equal step length, wherein a complementary movement of the load is effectuated.
Dependencies are inferred from the claim text.