Apparatus for use in raising or lowering a load in a condition o

Details Apparatus for use in raising or lowering a load in a condition o Apparatus for use in raising or lowering a load in a condition o

1975-07-07

1977-05-24

Paperner, L. J.

Implements or apparatus for applying pushing or pulling force

Step-by-step traveling bar

Pawl actuated

214 14, 212 3, B66D 148

Patent

active

040250555

ABSTRACT:
Motion compensated load lifting apparatus for use on marine vessels. Apparatus includes means for maintaining tension in load lifting member during relative motion and means for locking the tensioning means in one direction of motion. Tensioning means includes high and low pressure accumulators which enable compressed fluid to act on linear or rotary drives to apply high and low tension. Load rises and falls with vessel under high tension but weight is mainly offset. Locking means, such as ratchet and pawl or pilot-operated valve, is selected to lift load from vessel at crest of relative motion. Tension can be applied with linear ram, rotary drive or through differential drive.

REFERENCES:
patent: 1999936 (1935-04-01), Lange
patent: 2732180 (1956-01-01), Gratzmuller
patent: 3294369 (1966-12-01), Butler
patent: 3512657 (1970-05-01), Chambers
patent: 3662991 (1972-05-01), Lakiza et al.
patent: 3793835 (1974-02-01), Larralde
patent: 3804183 (1974-04-01), Duncan et al.
patent: 3871527 (1975-03-01), Schimmeyer et al.

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