The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 04, 1989
Filed:
Mar. 28, 1988
Applicant:
Inventor:
Stanley J Johnson, Cedar Falls, IA (US);
Assignee:
Deere & Company, Moline, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B24B / ;
U.S. Cl.
CPC ...
51247 ;
Abstract
A material chapping machine, such as a forage harvester, includes a system for automatically controlling the movement of a sharpening stone to sharpen the knives of a rotating cutterhead. Motors move the stone radially towards and away from the cutterhead and laterally across the cutterhead. Contact between the stone and the cutterhead is sensed by knock sensors. The motors are controlled by a programmed microprocessor.