E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/14.3
E21B 19/10 (2006.01) E21B 19/07 (2006.01)
Patent
CA 1218642
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.
460510
Gowling Lafleur Henderson Llp
Hughes Tool Company
LandOfFree
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