Tub grinder
OwnerRobert R. Andersoninventor
Life of this patent
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Abstract
Improved tub grinding apparatus is described for grinding bulk materials. A concave restricter is positioned adjacent to and extends along the length of a rotatable rotor. The spacing between the concave restricter and the rotor is adjustable for determining the particle size of the resulting ground material. An auger is positioned adjacent to and along the length of the rotor for receiving ground bulk material and conveying it away from the rotor. The auger is laterally spaced from the axis of the rotor. The apparatus has a lower profile than conventional tub grinders.
Claims17
Tub grinding apparatus for grinding bulk materials, the apparatus being of the type including a rotatable tub having a stationary floor, and an elongated rotor member with radially extending hammer elements, wherein said rotor member is rotatably mounted in a manner such that the hammer elements extend at least partially through the floor and into the tub, wherein the improvement comprises:
- (a) elongated auger means positioned adjacent to and extending substantially along the length of said rotor member below said floor;
- wherein said auger means has a length at least as long as said rotor member and is laterally spaced from the axis of said rotor member;
- (b) concave restricter means adjacent to and extending substantially along the length of said rotor member, wherein the position of said restricter means relative to said rotor member is adjustable;
- wherein the length of said restricter means is at least equal to the length of said rotor member;
- wherein bulk material is reduced in particle size by said rotor member and is conveyed away from said rotor member by said auger means;
- wherein said auger means includes a lower edge which does not extend below said restricter means by more than six inches.
Tub grinding apparatus for grinding bulk materials, the apparatus being of the type including a rotatably tub having a stationary floor and an elongated rotor member with radially extending hammer elements, wherein said rotor member is rotatably mounted in a manner such that the hammer elements extend at least partially through the floor and into the tub, wherein the improvement comprises:
- (a) elongated auger means positioned adjacent to and extending substantially along the length of said rotor member below said floor;
- wherein said auger means is parallel to said rotor members;
- wherein said auger means has a length at least as long as said rotor member and is laterally spaced from the axis of said rotor member;
- (b) concave restricter means adjacent to and extending substantially along the length of said rotor member;
- wherein the length of said restricter means is at least equal to the length of said rotor member;
- (c) adjustment means for adjusting the spacing between said restricter means and said rotor member;
- (d) elevator means adjacent said auger means;
- (e) a housing under said floor enclosing said restricter means and said auger means;
- wherein bulk material is reduced in particle size by said rotor member and is conveyed away from said rotor member by said auger means;
- wherein said auger means includes a lower edge which does not extend below said restricter means by more than six inches;
- and wherein said elevator means conveys said material away from said auger means.
Dependencies are inferred from the claim text.