Device for tensioning several screw bolts

Details Device for tensioning several screw bolts Device for tensioning several screw bolts

1978-03-28

1979-11-27

Watson, Robert C.

Tools

Wrench, screwdriver, or driver therefor

Machine

254 29A, E21B 1900

Patent

active

041754530

ABSTRACT:
A device for tensioning a screw bolt wherein the device comprises a lifting cylinder having a piston and arranged on a support ring and means responsive to the piston for engaging the screw bolt in a positive locking manner including: a first member engaged by the piston; a second member hinged to the first member; and guide surfaces for pressing the second member against an engagement surface of the screw bolt in a positive engaging and self-locking manner.

REFERENCES:
patent: 3844533 (1974-10-01), Markiewicz et al.
patent: 3847041 (1974-11-01), Meschonat et al.

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