High torque hydraulic shoe bolt wrench

Details High torque hydraulic shoe bolt wrench High torque hydraulic shoe bolt wrench

1989-12-18

1991-04-09

Parker, Roscoe V.

Tool driving or impacting

Automatic control of power operated means

Tool advance causing or controlling means

81 5722, 81470, 81 5725, 60424, 192150, B25B 2100

Patent

active

050056549

ABSTRACT:
A hydraulic shoe bolt wrench used to mount and remove shoe bolts which secure shoes to a track chain. The apparatus comprises a vertical cylinder stood upright on a frame moving on a work table, a main frame secured to a piston rod of the vertical cylinder, a wrench socket driving shaft vertically projected below the main frame, a low speed high torque motor and a reduction gear provided on the driving shaft. Pressure oil is supplied to the high speed low torque motor and high pressure oil is supplied to the low speed high torque motor. Switching of the high speed low torque motor to the low speed high torque motor is carried out by a pressure switch disposed in a low pressure hydraulic circuit.

REFERENCES:
patent: 3108507 (1963-10-01), Quarve
patent: 3142210 (1964-07-01), Rodgers
patent: 3507173 (1970-04-01), Wallace
patent: 3529513 (1970-09-01), Amtsberg
patent: 3586115 (1971-06-01), Amtsberg
patent: 3686983 (1972-08-01), Flagge
patent: 4300641 (1981-11-01), Kinkel
patent: 4403663 (1983-09-01), Janssen
patent: 4432257 (1984-02-01), Yamamoto
patent: 4484871 (1984-11-01), Adman

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