Grinder with adjustable screens
AssigneeVermeer Manufacturing Company
InventorsJohn Gary Gardner, Darin Lyn Dux
Life of this patent
Estimating the term…
Abstract
A grinder having an adjustable screen arrangement. The adjustable screen arrangement including two screens independently positionable in a number of positions relative to a grinding drum. Each screen further having a leading end independently positionable relative a trailing end of the screen. The adjustable screen arrangement allowing for selectively varied clearances between the screens and the grinding drum.
Claims16
A horizontal grinder, comprising:
- a) a grinding drum;
- b) at least two arcuate screens located adjacent to the grinding drum, the at least two arcuate screens having a leading edge and a trailing edge;
- and
- c) a plurality of adjusting members that position each screen in a selected one of a plurality of positions relative to the grinding drum;
- d) wherein the screens are positionable relative to the grinding drum independent of one another;
- e) wherein the adjusting members selectively vary the clearance between the leading edge of each screen and the grinding drum, and selectively vary the clearance between the trailing edge of each screen and the grinding drum, the leading edge clearance and the trailing edge clearance being adjustable independent of one another.
A screen arrangement for a horizontal grinder having a mill box, a mill box cover, and a grinding drum, the screen arrangement comprising:
- a) at least two arcuate screens, the at least two arcuate screens having a leading edge and a trailing edge;
- and
- b) a plurality of adjusting members that independently position each screen in a selected one of a plurality of positions, at least one of the adjusting members defining a pivot point and a series of arc sections opposite the pivot point;
- c) wherein the adjusting members selectively adjust the position of the leading edge of each screen, and selectively adjust the position of the trailing edge of each screen, the leading edge and the trailing edge being positionable independent of one another.
A method of maintaining a horizontal grinder, comprising the steps of:
- a) providing a horizontal grinder having a mill box, a mill box cover, a grinding drum, and a screen arrangement, the screen arrangement including a first screen and a second screen respectively located in first and second screen positions about the circumference of the grinding drum;
- and
- b) switching the positions of the first and second screens such that the heavier worn screen previously located in one of the first and second screen positions is positioned in the other of the first and second screen positions;
- c) wherein the position of the leading edge and the position of the trailing edge of each screen is positionable in the respective screen position independent of one another.
Dependencies are inferred from the claim text.