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:
Aug. 07, 1984
Filed:
Dec. 02, 1981
Applicant:
Inventors:
John D Long, Ankeny, IA (US);
Phillip E Stevens, Ankeny, IA (US);
Assignee:
Deere & Company, Moline, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A01B / ; A01B / ;
U.S. Cl.
CPC ...
172705 ;
Abstract
A spring trip standard assembly for a chisel plow or the like, the standard assembly having a compact single coil spring structure with a trip geometry producing a high initial trip force and a reduced maximum to initial trip force ratio. The horizontal trip force remains above the initial trip force through greater than half the trip height and then the trip force decreases. By reduction of the ratio of maximum to initial trip force, a heavy duty standard assembly is provided which may be used on lightweight tool frames originally designed for high trip force ratio standards having lower initial spring trip forces.