Grate knife for use with winged cutting knife for producing wood

Details Grate knife for use with winged cutting knife for producing wood Grate knife for use with winged cutting knife for producing wood

1989-10-13

1990-09-25

Bray, W. Donald

Solid material comminution or disintegration

Apparatus

Comminuting surface provided with openings to permit...

144162R, 144176, 144241, 241 893, 241294, B02C 1702

Patent

active

049587757

ABSTRACT:
A wood cutting knife is provided for producing wood chips or flakes. The knife includes a central cutting member, and two wing members positioned on opposite sides of the central cutting member. The height of the wing members determines the depth of cut of the cutting knife, including the central cutting member. Also provided is a wood processing machine for supporting such cutting knives which includes a plurality of anvil members configured to interact intimately with the cutting knives. Also provided is a breakaway feature between the cutting members and a supporting surface defined by the wood processing machine. The supporting surface is relatively smooth, and the cutting knives are mounted to the surface by weldments. If a cutting knife encounters unprocessable foreign material such as metal or rock, the knife breaks away from the supporting surface at the weldment connection, and severe damage to the supporting surface or machine is avoided. Also provided is a separating grate configured to allow wood chips or flakes which have been sufficiently reduced in size to pass from the machine. The grate may be configured to accept a plurality of stationary knives which interact with the previously-referenced cutting knives to aid in processing of the wood. These knives may define one, two, three, or more cutting edges and may have a stepped configuration. The stationary knives may also include a breakup ledge configured to prevent excessively long wood members from passing through the grate, and may also have a stepped configuration as to cooperate intimately with the stepped configuration of the hammers, to insure optimum wood processing between the two.

REFERENCES:
patent: 1403698 (1922-01-01), Letz
patent: 1408055 (1922-02-01), Williams
patent: 1420355 (1922-06-01), Williams
patent: 2360357 (1974-10-01), Marshall
patent: 3913643 (1975-10-01), Lambert
patent: 4226375 (1980-10-01), Cameron

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