Elevator/spider with improved locking mechanism

Details Elevator/spider with improved locking mechanism Elevator/spider with improved locking mechanism

1984-01-11

1986-04-01

Cherry, Johnny D.

Handling: hand and hoist-line implements

Grapple

Socket and slip wedge

E21B 1907

Patent

active

045793794

ABSTRACT:
An elevator/spider having a series of slips in a tapered bowl and a yoke for pivotally setting the slips. A lock rod, having a hole, is connected to the yoke and extends downward into a locking mechanism. The locking mechanism has a lock plunger which can be moved into or out of the hole in the lock rod, to lock the lock rod in a downward position and the slips in an upward, retracted position. The lock plunger is moved by a key, cooperative with a key slot in the lock plunger. The key is attached to a cam, which is rotated by a handle. The cam also has a cam surface which can contact the lock rod to hold the lock rod and the slips down.

REFERENCES:
patent: 2030087 (1936-02-01), Young et al.
patent: 3149391 (1964-09-01), Boster
patent: 4275488 (1981-06-01), Gray
patent: 4361940 (1982-12-01), McFadden
BJ-Hughes, Inc., "Replacement Parts Manual for Slip Type Elevator Spider", pp. 11-13.

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