Back to results
US 7,441,719 B2Granted
Mill box for materials grinder
AssigneeVermeer Manufacturing Company
InventorsGary Verhoef, Frederick H. Lucas, Duane A. Harthoorn
Life of this patent
Estimating the term…
Abstract
A grinder having a grinding structure and a sizing screen is disclosed herein. A top cover covers the grinding structure. The sizing screen can be removed from the grinder by opening the cover, and lifting the sizing screen through the opening left by the cover.
Claims14
A grinding device, comprising:
- a frame;
- a grinding drum rotatably coupled to the frame;
- a conveyor and a feed roller that feed material to the grinding drum, wherein the feed roller pivots between a lowered position and a raised position relative to the conveyor;
- a curved sizing screen at least partially located beneath the grinding drum;
- curved supports mounted to the frame, the curved sizing screen being supported in relation to grinding drum by the curved supports;
- and
- a top cover pivotally connected to the frame, the top cover being moveable relative to the grinding drum between a closed position and an open position;
- wherein the sizing screen is removable from the frame by moving the top cover to the open position and lifting the sizing screen above the grinding drum.
5 more elements
A method of removing a sizing screen from a mill box, the sizing screen being at least partially located beneath a rotating drum mounted within the mill box, the method comprising the steps of:
- a) pivoting a top cover from a closed position to an open position relative to the rotating drum;
- b) pivotally attaching a lift bar to the sizing screen;
- c) lifting the sizing screen in an upward direction such that that sizing screen slides along arcuate supports located within the mill box;
- and
- d) rotating the sizing screen around a centerline of the grinding drum, the rotation being accommodated at least in part by the pivotally attached lift bar.
2 more elements
Dependencies are inferred from the claim text.