Motor-driven screwing and transporting tool for reactor...

Details Motor-driven screwing and transporting tool for reactor... Motor-driven screwing and transporting tool for reactor...

B - Operations, Transporting

25

B

81/25

B25B 29/02 (2006.01) B23P 19/06 (2006.01) B25B 21/00 (2006.01) G21C 13/06 (2006.01)

Patent

CA 1038208

Abstract of the Disclosure The invention concerns a motor-driven screwing and transporting tool for tightening or loosening the threaded studs and associated tighten- ing nuts of the head bolting of pressure vessels. After the tightening nuts are loosened or before they are tightened, the weight of the studs is taken over by rotating bearings that can be lifted, so that the studs with their tightening nuts can be screwed in or out, the screw threads of the studs being thus weight-relieved. The invention is intended primarily for nuclear reactor pressure vessels.

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