Waste material breaking and shredding apparatus
OwnerRobert M. Williamsinventor
Life of this patent
Estimating the term…
Abstract
Apparatus for reducing waste material in which substantially parallel shafts carry cooperating material reducing cutters for either direction of rotation of the shafts. There are selectively positionable cages at the discharge with comb teeth in position to cooperate with the cutters in either direction of cutter rotation, and there is a control system for operating the cutters and cages such that for normal reduction of waste material the cutters are rotated in a first direction and the cages are positioned to produce a desired size of reduced waste material, and the cutters are rotated in a second direction while the cages are positioned to release non-reducible material.
Claims8
Apparatus for reducing waste material comprising:
- a frame defining a working chamber having a waste material receiving opening and a waste material discharge;
- a pair of substantially parallel shafts operably supported in said frame above said discharge;
- drive means connected to said pair of shafts for rotating said shafts in forward and reverse directions;
- cutter teeth carried by each shaft in spaced apart positions such that cutter teeth on one shaft interfit in the spaces between cutter teeth on the other shaft for either direction of shaft rotation, said cutter teeth on each shaft being formed with radially projecting teeth effective for reducing waste material in either direction of shaft rotation;
- cage means operably carried by said frame for movement into selected fixed position, one of which positions is to extend across said working chamber discharge, said cage means carrying a series of comb elements fixed thereon and presented inwardly toward said cutter teeth such that for shaft rotation to move said radially projecting teeth past said fixed comb elements, said comb elements and projecting teeth cooperate to break elongated waste material over said comb elements in either direction of rotation, and being divided into two parts for meeting at a position below said pair of shafts;
- and actuator means connected to said cage means for moving said cage means between positions withdrawn from said working chamber discharge for releasing non-reducible material and positions selectively extending across said working chamber discharge for sizing the waste material.
Apparatus for reducing waste material and for varying the size thereof comprising:
- (a) a pair of counter-rotating substantially parallel shafts, each shaft carrying spaced apart discs formed with cutting teeth, which spaced discs interfit during shaft rotation and cooperate with each other in reduction of waste material;
- (b) a frame supporting said shafts and providing inlet means for waste material and an outlet for the movement of reduced waste material;
- (c) cage means movable mounted on said frame adjacent said outlet to assume a position normally retaining unreduced waste material against movement through said outlet;
- (d) comb teeth carried by said cage means in position to project into the spaces between said spaced discs for cleaning waste material from between said discs and for cooperation with said cutting teeth in the reduction of waste material;
- (e) actuator means connected to said cage means for moving said cage means into positions different from said normal position relative to said outlet to control the size of reduction of the waste material;
- (f) hydraulic motor means for driving said counter-rotating shafts in opposite directions;
- and
- (g) hydraulic fluid circuit means containing said motor means and said actuator means.
Dependencies are inferred from the claim text.