Hydraulic bolt tensioner

Details Hydraulic bolt tensioner Hydraulic bolt tensioner

1989-10-03

1991-03-12

Schmidt, Frederick R.

Tools

Wrench, screwdriver, or driver therefor

Machine

254 29A, B25B 2902

Patent

active

049984535

ABSTRACT:
A hydraulic bolt tensioner for tensioning a threaded bolt extending from a fixed component include a cylinder adapted to react against the component, a piston slidably mounted in the cylinder and having an axial bore therein through which the bolt extends, the piston reacting against a reaction member threaded on the bolt, and a source of hydraulic fluid. Defined within the cylinder are a first chamber the supply of fluid under pressure to which effects powered extension of the piston within the cylinder, and a second chamber the supply of fluid under pressure to which effects powered retraction of the piston within the cylinder.

REFERENCES:
patent: 3877326 (1975-04-01), Kock et al.
patent: 4438901 (1984-03-01), Reneau et al.

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