Handling: hand and hoist-line implements – Grapple – Expanding
Patent
1986-09-29
1988-05-24
Moon, Charlie T.
Handling: hand and hoist-line implements
Grapple
Expanding
291573R, 294265, 29726, 29280, 294 8225, B25B 100, B66C 100
Patent
active
047461586
ABSTRACT:
A gravity-operated tube gripper and puller actuated by a rotatably-operated latch is disclosed herein. The gripper includes a gripping means having a collet assembly with a threaded collet which is expandable by means of a frustro-conical body. The gripper further includes a suspension member connected to the frustro-conical body, and detachably connected to the expandable collet. The rotatably-operated latch of the gripper selectively disconnects the collet assembly, so that the weight of the frustro-conical body engages the mouth of the expandable collet, and expands the threaded exterior of the collet into the inner walls of the tube. The invention provides a tube gripper which is easily manually operated through a simple extension rod. It is particularly useful in removing sample tubes from areas of limited accessibility in the secondary sides of nuclear steam generators.
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U.S. Patent Application Ser. No. 584,225, filed Feb. 27, 1984, by Calhoun et al., entitled "Double-Grip Tube Puller".
Moon Charlie T.
Westinghouse Electric Corp.
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