US 7,861,958 B2Granted

Conical-shaped impact mill

AssigneeLehigh Technologies, Inc.

InventorsPeter J. Waznys, Josef Fischer, Anthony M. Cialone

Life of this patent

Estimating the term…

Loading patent…

Abstract

An impact mill including a base portion on which is disposed a rotor rotatably mounted in a bearing housing, the rotor having an upwardly aligned cylindrical surface portion coaxial with the rotational axis. The impact mill is provided with a mill casing within which is located a conical track assembly which surrounds the rotor to form a conical grinding path. The mill casing is provided with a downwardly aligned cylindrical collar which may be axially adjusted to set a grinding gap between the rotor and the mill casing. The rotor is provided with a plurality of impact knives complementary with a plurality of impact knives disposed on the inside top surface of the mill casing. The conical track assembly can be a series of assembled conical sections or one unit with varied number of serrations in either a vertical or sloped configuration. This flexibility allows for greater compatibility with the feedstock being milled.

Claims3

Dependent claims

An impact and grinding mill, comprising:

a) a base portion upon which is disposed a rotor rotatably mounted in a bearing housing, said rotor having a top surface and an upwardly aligned conical surface portion coaxial with the rotational axis,
b) a mill casing over said rotor and having an inner side of a top surface and within which is located a conical track assembly which surrounds said rotor to form a conical grinding path,
d) said mill casing having a downwardly aligned cylindrical collar which may be axially adjusted to set a grinding gap between said rotor and said conical track assembly,
e) wherein said rotor comprises a plurality of impact knives on said top surface of said rotor that are complementary with a plurality of impact knives on said inner side of said top surface of said mill casing,
f) a plurality of impact knives on upwardly aligned conical surface portion of said rotor, and
g) said conical track assembly provided with serrated impact surfaces wherein said serrations project as a line on a plane of the rotor axis forming a slope relative to said rotor axis.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/146,138Filed 25 Jun 2008 · continuation in part
Priority: 5 Apr 2007
Published: US 2009/0134257 A128 May 2009
Granted: 4 Jan 2011
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

B02C 13/14
Disintegrating by mills having rotary beater elements ; Hammer mills: with vertical rotor shaft, e.g. combined with sifting devices
B02C 13/18
With vertical rotor shaft, e.g. combined with sifting devices: with beaters rigidly connected to the rotor
B02C 13/1814
The material to be crushed being thrown against an anvil or impact plate: by means of beater or impeller elements fixed on top of a disc type rotor
B02C 13/2804
Shape or construction of beater elements: the beater elements being rigidly connected to the rotor

Family

Application11/784,032Parent of this continuation-in-part · filed 5 Apr 2007
US 2009/0134257 A1Pre-grant publication · published 28 May 2009
US 2008/0245913 A1Published application
US 7,900,860 B2Related patent
US 7,861,958 B2This patent

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