Elevator/spider with counterbalance

Details Elevator/spider with counterbalance Elevator/spider with counterbalance

1984-03-12

1985-11-05

Marbert, James B.

Handling: hand and hoist-line implements

Grapple

Socket and slip wedge

E21B 1910

Patent

active

045509425

ABSTRACT:
An elevator/spider having a series of slips in a tapered bowl and a yoke for pivotally setting slips, a torsion spring is mounted on the body of the elevator/spider. A wire rope connects the torsional spring to the yoke, so that the weight of the slips is counterbalanced by the force of the torsional spring.

REFERENCES:
patent: 3149391 (1964-09-01), Boster

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