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:
Feb. 11, 1997
Filed:
Nov. 17, 1995
Terry L Lowe, Ankeny, IA (US);
James T Noonan, Johnston, IA (US);
Deere & Company, Moline, IL (US);
Abstract
Down pressure structure for providing an adjustable down force on a rig of row crop implement such as a cultivator includes an overcenter toggle connected to the rig for pivoting about a toggle axis between a first and second positions. The toggle has a protrusion that contacts the edge of a rig plate at two different locations corresponding to a light and a heavy down pressure position. A down pressure spring is tensioned between the frame and the toggle and maintains the toggle in a selected one of two overcenter positions corresponding to the two different spring tension positions. A hex projection on the toggle receives a conventional wrench for moving the toggle between the first and second positions. A second toggle and down pressure spring combination provide additional spring adjustments so that at a numerous easily determinable down pressure settings are available.