Jacking apparatus

Details Jacking apparatus Jacking apparatus

1975-12-15

1977-02-15

Duzan, James R.

Implements or apparatus for applying pushing or pulling force

Step-by-step traveling bar

Pawl actuated

104147R, 104165, B66F 104

Patent

active

040079155

ABSTRACT:
A jacking apparatus comprises a rail having a plurality of pairs of vertical slots longitudinally spaced apart. A sled slides along this rail and has cross members to which are pivotably attached ends of hydraulic cylinders, the other ends of the hydraulic cylinders being pivotably attached to cross heads which also slide along the rail. The cross heads have bevelled latches, slidable vertically, and longitudinally reversible for engagement with the slots in the rail; so that repetitive, reciprocal movement of the hydrauic cylinder pistons will cause successive, incremental movements of the sled and a load selectively pushed or pulled by the sled along the rail.

REFERENCES:
patent: 2803357 (1957-08-01), Ronfeldt
patent: 3373971 (1968-03-01), Chambers et al.
patent: 3464095 (1969-09-01), Chambers
patent: 3527442 (1970-09-01), Korkut
patent: 3559954 (1971-02-01), Chambers et al.
patent: 3659823 (1972-05-01), Griffin
patent: 3870279 (1975-03-01), Century

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