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. 06, 1998
Filed:
Apr. 01, 1997
Philip David Cox, Polk City, IA (US);
James Thomas Noonan, Johnston, IA (US);
David Lee Colgan, Urbandale, IA (US);
Deere & Company, Moline, IL (US);
Abstract
A large diameter, short toothed rolling shield fabricated by vacuum forming talc filled polyethylene sheet having a smooth surface and sufficient flexibility to resist soil build-up in damp conditions. Preferably the diameter of the shield is substantially greater than twenty inches and on the order of twenty four inches and includes teeth uniformly spaced around the periphery, each tooth having a length less than approximately ten percent of the shield radius. A circular rib near the center of the shield and radial reinforcing ribs extending from the circular rib on the convex side of the shield to the base of alternating teeth provide stiffness and strength. The concave tool side of the shield is devoid of protrusions to reduce churning of thrown soil.