Hydraulic wrench for limited space application

Details Hydraulic wrench for limited space application Hydraulic wrench for limited space application

1980-02-28

1982-06-29

Jones, Jr., James L.

Tools

Wrench, screwdriver, or driver therefor

Machine

74128, B25B 1346

Patent

active

043367275

ABSTRACT:
A hydraulically operated wrench for turning a threaded connector, especially in applications in which the space above and around the threaded connector is rather limited. The wrench has a socket formed with a polygonal passage therethrough to be engaged with a polygonal head of the threaded connector to be tightened or loosened. The socket is turned about its axis by the reciprocation of a piston of a fluid operated cylinder and piston unit and ratchet pawls tiltably connected to the free end of the piston rod of the unit and engaging with the teeth of a ratchet wheel fixed to the peripheral surface of the socket. In order to hold the outer diameter of the rim forming the ratchet wheel as small as possible while not unduly weaken the same, the rim is formed in the region of the corners of the polygonal passage extending through the socket with solid uninterrupted portions between which the teeth of the ratchet wheel are cut into the rim and the stroke of the piston is made in such a manner that the pawls after engaging the teeth to one side of a solid portion will, during the following forward stroke of the piston, engage with the teeth on the other side of the respective solid portion.

REFERENCES:
patent: 2758569 (1956-08-01), Peterson
patent: 4200011 (1980-04-01), Wilmeth
patent: 4201099 (1980-05-01), Junkers

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