Portable balanced motion compensated lift apparatus

Details Portable balanced motion compensated lift apparatus Portable balanced motion compensated lift apparatus

1984-06-29

1986-06-10

Taylor, Billy S.

Implements or apparatus for applying pushing or pulling force

Apparatus for hauling or hoisting load, including driven...

Device includes rotatably driven, cable contacting drum

91350, 254900, 414138, B66D 152, B66D 306, B65G 6758

Patent

active

045938857

ABSTRACT:
A motion compensating device that is installed on a lift line between a crane and an object to be lifted. The device limits dynamic loads on the line by taking up and letting out line by preventing the lift line from going slack and by lengthening acceleration time. The device consists of a hydraulic system and sheave mechanical system arranged in combination together with a balancing system for a given load range. The device is balanced for a given load range to provide a full range of compensation while hanging free. Balance is provided by offsetting a load line a calculated distance Y from a vertical line drawn through a lift point. This offset compensates for turning moments of the apparatus.

REFERENCES:
patent: 3314657 (1967-04-01), Prud'Homme et al.
patent: 3343810 (1967-09-01), Parnell
patent: 3912227 (1975-10-01), Meeker et al.
patent: 4025055 (1977-05-01), Strolenberg
patent: 4236695 (1980-12-01), Morrison
patent: 4395178 (1983-07-01), MacDonell et al.

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