Work-holding clamp with double-acting hydraulically actuated jaw

Details Work-holding clamp with double-acting hydraulically actuated jaw Work-holding clamp with double-acting hydraulically actuated jaw

1981-11-19

1983-10-18

Watson, Robert C.

Work holders

With fluid means

Cylinder-piston means in series with additional positioning...

269138, B23Q 302

Patent

active

044101694

ABSTRACT:
A work-holding clamp retains a work piece on a machine tool table and includes a body member having a flat supporting surface and the means to secure the body member to a work table. This body member is made with a stepped bore formed therein and therethrough. The forward end of the body member has a formed dovetail in which moves a jaw member at a selected slant or slope. Within this body member is a reciprocal hydraulic piston having its forward end formed with two cam surfaces. A lower cam surface is adapted to engage a mating cam surface on the jaw to move the jaw member forwardly and downwardly to a gripping condition. An actuation of the piston rearwardly causes an upper cam surface to engage a removable pin to move the jaw member upwardly and rearwardly to disengage the jaw member from the workpiece. This piston is carried in the stepped bore with the rear of the piston being a sliding fit in the larger portion of the bore. An inlet for pressurized air or fluid is formed in the stepped bore adjacent to the fixed seal and inflow of pressurized air or fluid causes rearward movement of the piston. This piston is provided with an integral threaded portion in which is mounted a removable screw or bolt that permits manipulative rotation of the piston.

REFERENCES:
patent: 2637249 (1953-05-01), Swenson
patent: 2667799 (1954-02-01), Rzepela
patent: 3595112 (1971-07-01), DeGeorge
patent: 3603579 (1971-09-01), Odom
patent: 4223879 (1980-09-01), Wolf
patent: 4365792 (1982-12-01), Johns

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