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:
Oct. 22, 1985
Filed:
Oct. 13, 1983
William J Dietrich, Sr, Congerville, IL (US);
Cary L Sizelove, Eureka, IL (US);
DMI, Inc., Goodfield, IL (US);
Abstract
A spring reset mechanism for a ground engaging tool includes a four-bar linkage mounting for the tool. A fixed cam surface is mounted to one of the links and a roller cam carried by a guide link is spring-biased against the cam surface to urge the tool into its working position. As the tool nears the limit of its raised position, a recess in the cam surface receives the roller to reduce the rate of spring compression and enable the tool to clear an obstruction without substantially increasing the resistance force. Further, as the tool raises, the resistance moment arm decreases which further facilitates clearing a large obstruction. The reset force characteristics may be changed by simple and economical design changes.