US 8,783,593 B2Granted

Material reduction machine

AssigneeAstec Industries, Inc.

InventorsArnold Neil Peterson, Bradley Simon Harness

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Abstract

A material reduction machine includes a frame, a drum housing mounted to the frame, and a drum that is mounted for rotation within the drum housing. The drum includes a circumferential wall and a knife that is mounted on the drum. The machine includes a plurality of interchangeable belly bands, each of which is adapted to be removably attached to the frame so as to form a portion of the drum housing and to provide an inner surface that forms a belly band arc portion that is concentric with and of a larger diameter than the circumferential wall of the drum. A first interchangeable bellyband has a smooth inner surface, and a second interchangeable belly band has a plurality of flow interrupters spaced along its inner surface.

Claims20

Dependent claims

A material reduction machine comprising:

(a) a frame;
(b) a drum housing mounted to the frame;
(c) a drum that is mounted for rotation within the drum housing, said drum comprising:
(i) a circumferential wall;
(ii) a knife having a leading edge, said knife being mounted on the drum with respect to the circumferential wall so that as the drum rotates, the leading edge of the knife cuts an arc that is concentric with and of a larger diameter than the circumferential wall of the drum;
(d) means for rotating the drum within the drum housing;
(e) a feed chute for directing material to be reduced into the drum housing;
(f) a discharge chute for directing reduced material away from the drum housing;
(g) a plurality of interchangeable belly bands, each of which is adapted, to be removably attached to the frame so as to form a portion of the drum housing and to provide an inner surface that forms a belly band arc portion that is concentric with and of a larger diameter than the circumferential wall of the drum, said belly band arc portion being adjacent to a portion of the arc cut by the leading edge of the knife, wherein the plurality of interchangeable belly bands comprises:
(i) a first interchangeable, belly band having a smooth inner surface;
(ii) a second interchangeable belly band having a plurality of flow interrupters spaced along its inner surface.

8 more elements

A material reduction machine comprising:

(a) a frame;
(b) a drum housing mounted to the frame;
(c) a drum that is mounted for rotation within the drum housing, said drum comprising:
(i) a circumferential wall;
(iii) a plurality of pockets spaced around and formed in the circumferential wall;
(ii) a plurality of knives, each of which has a leading edge and each of which is mounted on one of the pockets so that as the drum rotates, the leading edges of the plurality of knives cut an arc that is concentric with and of a larger diameter than the circumferential wall of the drum;
(d) means for rotating the drum within the drum housing;
(e) a feed chute for directing material to be reduced into the drum housing;
(f) an intermediate housing that is located downstream of and adjacent to the drum housing;
(g) a gauging assembly that is mounted in the intermediate housing adjacent to the drum, said gauging assembly comprising a plurality of flow diverters that are spaced across the width of the intermediate housing so as to provide a plurality of sized openings through which reduced material from the drum may pass;
(h) a discharge chute for directing reduced material away from the drum housing;
(i) a plurality of interchangeable belly bands, each of which is adapted to be removably attached to the frame so as to form a portion of the drum housing and to provide an inner surface that forms a belly band arc portion that is concentric with and of a larger diameter than the circumferential wall of the drum, said belly band arc portion being adjacent to a portion of the arc cut by the leading edges of the plurality of knives, wherein the plurality of interchangeable belly bands comprises:
(i) a first interchangeable belly band having a smooth inner surface;
(ii) a second interchangeable belly band having a plurality of flow interrupters spaced along its inner surface, said plurality of flow interrupters defining an arc that is concentric with and of a different diameter than the belly band arc portion.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/491,344Filed 7 Jun 2012 · us provisional application
Priority: 7 Jul 2011
Published: US 2013/0008987 A110 Jan 2013
Granted: 22 Jul 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

B02C 18/14
With rotating knives: within horizontal containers
B02C 18/18
Details: knives; Mountings thereof
B02C 18/2216
Feed or discharge means: discharge means
B27L 11/002
Manufacture of wood shavings, chips, powder, or the like ; Tools therefor: transporting devices for wood or chips

Family

Application61/571,873Us provisional application · filed 7 Jul 2011
US 2013/0008987 A1Pre-grant publication · published 10 Jan 2013
US 8,783,593 B2This patent

From the US filing history. Foreign family members aren’t listed.

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