B - Operations – Transporting – 66 – F
Patent
B - Operations, Transporting
66
F
254/131
B66F 1/04 (2006.01) B66F 1/06 (2006.01)
Patent
CA 1161424
ABSTRACT A lifting jack for lifting loads and exerting a pulling force between two locations includes an I-beam standard having a series of uniformly shaped and evenly spaced apertures, an upper runner disposed about the standard and carrying a first climbing pin which is adapted to fit within a corresponding one of the various apertures, a lower runner disposed about the standard and carrying a second climbing pin also adapted to fit within a corresponding one of the various apertures. The upper and lower runners are connected together by a pitman and these three components are further assembled to a lever which is pivotally attached so as to provide a jacking action to the upper and lower runners. The lever has a pair of fulcrum points only one of which is used with any one jacking cycle, depending upon which runner is advancing and which climbing pin is to be inserted into a corresponding aperture. The pitman is arranged into a single-piece, U-shaped lateral cross-section configuration providing greater strength and durability at a very critical point in the construction. A reversing switch and reversing latch combination are arranged relative to the upper and lower runners so that the direction of movement of these runners may be reversed.
386003
Bloomfield Manufacturing Co. Inc. (the)
Smart & Biggar
LandOfFree
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