Device for tightening, prestressing and untightening a threaded

Details Device for tightening, prestressing and untightening a threaded Device for tightening, prestressing and untightening a threaded

1976-08-09

1977-12-13

Jones, Jr., James L.

Tools

Wrench, screwdriver, or driver therefor

Machine

B25B 2902

Patent

active

040622541

ABSTRACT:
A device for tightening, prestressing and untightening a threaded joint has a body for mounting around a nut in the joint. The body is provided with pistons, actuated by pressure medium for providing an elastic elongation of a screw in the joint. Inclined planes are arranged to convert the axial movement of the pistons to a turning movement for turning the nut thereby achieving tightening or untightening of the threaded joint. The angle of the inclined planes are so adjusted that there is a suitable relationship between axial force and torque.

REFERENCES:
patent: 3230799 (1966-01-01), Maciulaitis

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