Metal working machine

Details Metal working machine Metal working machine

1977-09-16

1979-05-29

Meister, J. M.

Cutting

Means to drive or to guide tool

Unicyclic

83599, 83618, 83639, B26D 1100, B26D 512

Patent

active

041563778

ABSTRACT:
A single fluid power operated piston connected to a tool operating arm pivoted intermediate its opposite ends, undergoes movement through a predetermined stroke between limit positions to alternately perform punching and shearing operations at spaced stations along a common support bed of a metal working machine. The tool operating arm is held in one of its limit positions by the piston device under control of a selector valve while a foot pedal operated valve is displaced against a spring bias by the operator to effect powered displacement of the piston device to the other limit position in order to effect either a punching or shearing operation depending on the position of the selector valve. A shearing operation may also be performed through a second shear arm pivotally connected to the frame and actuated by the piston device.

REFERENCES:
patent: 3140634 (1964-07-01), McDaniel, Jr.
patent: 3255655 (1966-06-01), Stockard, Jr.
patent: 3468206 (1969-09-01), Bakula
patent: 3701276 (1972-10-01), Malmgren

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