Barge jacking apparatus

Details Barge jacking apparatus Barge jacking apparatus

1981-07-02

1983-06-14

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Multiple lifters

254 95, 254105, E02B 1704

Patent

active

043878814

ABSTRACT:
For use with an offshore drilling barge, a jacking apparatus is disclosed which utilizes racks mounted on the leg to be elevated, there being two or more racks on each leg, and the racks are equipped with teeth and spaces where teeth are omitted. There is attached to the barge a cooperative, fixed rack and a pinion carried on the end of a piston rod connected with a hydraulic piston. The pinion is located and has teeth appropriate to fit between the rack on the leg and the fixed rack on the barge. By aptly spacing the gaps in the several racks on the leg, racks can be omitted for significant lengths, and, additionally, the pinion can be periodically disengaged to enable rapid extension or retrieval of the pinion.

REFERENCES:
patent: 1929837 (1933-10-01), Cathcard
patent: 2765201 (1956-10-01), Phillips
patent: 3014346 (1961-12-01), Small
patent: 3674240 (1972-07-01), Larsson
patent: 4203576 (1980-05-01), Sutton

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