Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1976-09-21
1977-09-13
Jones, Jr., James L.
Tools
Wrench, screwdriver, or driver therefor
Machine
B25B 2902
Patent
active
040474569
ABSTRACT:
The invention concerns a motor-driven screwing and transporting tool for tightening or loosening the threaded studs and associated tightening 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.
REFERENCES:
patent: 3722332 (1973-03-01), Jones
patent: 3847041 (1974-11-01), Meschonat et al.
patent: 3877326 (1975-04-01), Kock et al.
Jones Jr. James L.
Kraftwerk Union Aktiengesellschaft
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