E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/14.3
E21B 19/06 (2006.01)
Patent
CA 1151638
ABSTRACT OF THE DISCLOSURE A link engaging pipe elevator is shown having link engaging arms and an automatic locking mechanism. Spring tension in the locking mechanism is overcome when the elevator body is rested on a substantially flat surface allowing unrestrained movement of the link engaging arms. As the elevator is lifted off the flat surface, the lock- ing mechanism is activated and the link engaging arms are locked into place. A cam and cam roller assist in moving the link engaging arms between the full open and closed positions.
374882
Bj-Hughes Inc.
Gowling Lafleur Henderson Llp
LandOfFree
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