E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/14.2
E21B 19/06 (2006.01)
Patent
CA 1150718
PIVOTING FOOT CLAMP AND MOUNTING FRAME ABSTRACT OF THE DISCLOSURE For clampingly holding a drill rod or the like, clamp apparatus that includes a mounting frame having spaced side members, a jar holder having upwardly diverging end walls and bounding an opening for clamp jaws, longitudinally spaced jaw actuators that include piston cylinder combination having cyl- inders pivotally mounted on the jaw holder, and piston rods for moving jaw brackets upwardly and outwardly of one another, each bracket having an inclined leg extending into the jaw opening in slidable relationship with the adjacent end wall and into slots in the holder side walls, and side walls that have interleaving portions that maintain the brackets at sub- stantially the same elevation relative one another while per- mitting the brackets moving longitudinally toward and away from one another, and a pin for releasably mounting each jaw to the respective bracket in abutting relationship to the adjacent bracket leg to move therewith, the jaws having semi-circular rod receiving recesses, the holder having oppositely disposed trunnions pivotally mounted by the side frame members, and legs pivotally mounted by the trunnions for mounting other mechanism and an adjustable connection for selectively retain- ing at least one of the legs in selected pivoted positions relative the frame.
404747
Anderson Ronald B.
Caneer Clifford
Maki Terrance C.
Johnson Douglas S. Q.c.
Longyear Company
LandOfFree
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