Sheet shear

Details Sheet shear Sheet shear

1974-09-06

1976-03-23

Schran, Donald R.

Cutting

Means to drive or to guide tool

With simple rectilinear reciprocating motion only

83375, 83624, 83643, 83821, 83698, B26D 516, B26D 542

Patent

active

039452875

ABSTRACT:
A metal plate shears for cutting large sheets of metal includes a fixed blade, and a movable blade cooperable therewith. The movable blade is mounted on a plate having a plurality of circular apertures therein. Discs are mounted in these apertures, the discs being eccentrically supported, the axes of the eccentrics being in the same angular relation to and the same angular relation from, the centers of the discs. Arms are secured to the discs, and hydraulic means are provided for rotating the discs about their eccentric axes. Rotation of the discs lowers the plate bearing the movable cutting knife past the fixed knife, shearing off a sheet inserted between the blades.

REFERENCES:
patent: 249831 (1881-11-01), Gault
patent: 345358 (1886-07-01), Boehme
patent: 353045 (1886-11-01), Witherell
patent: 374306 (1887-12-01), Keene
patent: 959674 (1910-05-01), Woodward
patent: 1918059 (1933-07-01), Sherman
patent: 2808883 (1957-10-01), Knokey
patent: 3678792 (1972-07-01), Dvorak

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