Partial cut shearing device

Details Partial cut shearing device Partial cut shearing device

1992-12-11

1994-09-20

Jones, Eugenia

Metal working

Method of mechanical manufacture

Obtaining plural product pieces from unitary workpiece

29414, 83202, 83584, 83598, 83601, 83695, 225 2, B26D 300, B26D 520, B26F 300

Patent

active

053476999

ABSTRACT:
A device for partially shearing single or multiple sheets of material comprising a base having a recess and a lower blade fixed in the recess. A pair of movable blades having opposed ends are pivotally attached to the base at one end. A lost-motion connecting link connects the free ends of the pair of movable blades together and is connected to a hydraulic piston which moves the link a limited distance towards the base, thereby to rotate both movable blades relative to the fixed blade with a scissors-like action. When the pair of blades is moved towards the lower blade, the material is cut inward from both sides or edges of the material, leaving an inner uncut portion of material having a width which corresponds to the stroke of the movable blades.

REFERENCES:
patent: 351024 (1886-10-01), Devero
patent: 720896 (1903-02-01), Cornelius et al.
patent: 1065882 (1913-06-01), Lockwood
patent: 1072848 (1913-09-01), Hall et al.
patent: 3570356 (1971-03-01), Williams et al.
patent: 4241631 (1980-12-01), Salvatore
patent: 4416176 (1983-11-01), Forthmann
patent: 4732068 (1988-03-01), Yasuda et al.
patent: 4785696 (1988-11-01), Martiny

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