Hydraulically operated valve wrench

Details Hydraulically operated valve wrench Hydraulically operated valve wrench

1977-11-07

1979-05-22

Jones, Jr., James L.

Tools

Wrench, screwdriver, or driver therefor

Machine

B25B 1346

Patent

active

041552792

ABSTRACT:
A hydraulically operated wrench comprised of a body saddle, bonnet clamp and hydraulic system providing controlled high torque turning force for in-line assembly and disassembly of threadedly connected valve housing components such as the body and bonnet. With the saddle and clamp separately secured to the valve body and bonnet, respectively, a pump actuated piston/cylinder is mounted on the saddle with its piston end secured to the clamp. The axis of the piston/cylinder is aligned with a force vector normal to the bonnet radius such that when the piston is extended outward by operation of a jack pump in response to hydraulic pressures imposed against the piston/cylinder it imposes a high force turning moment against the bonnet relative to the body.

REFERENCES:
patent: 2699589 (1955-01-01), Redell
patent: 2700201 (1955-01-01), Bannister
patent: 2823450 (1958-02-01), Thomas
patent: 4031784 (1977-06-01), Cobbe

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