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. 02, 1988
Filed:
May. 22, 1986
Marvin L Bigbee, Ankeny, IA (US);
Marvis L Ridgely, Des Moines, IA (US);
Michael D Snyder, Ankeny, IA (US);
Deere & Company, Moline, IL (US);
Abstract
A single disk opener blade is supported for rotation about a horizontal axis offset approximately seven degrees from the transverse direction. A seed tube extends closely adjacent the disk blade forwardly of the rotational axis generally in the shadow of the leading edge of the blade. The tube is angled around the disk blade hub to provide a narrow profile and to reduce the vertical velocity of the material deposited in the furrow. A furrow-firming and blade-scraping extension is connected to the lower end of the tube and extends rearwardly to a location behind the axis. The side of the firming extension is located transversely beyond the shadow of the disk blade to help form one side of the seed trench and to permit the seed to settle in the trench. Depth control structure includes a wheel support arm fixed to one end of the disk blade spindle and a quadrant fixed to the opposite end of the spindle for selectively adjusting the arm. A depth control wheel is mounted on the arm about an axis offset from the axis of the disk blade for rotation against the leading side of the blade to clean the blade, hold down trash and dirt, and provide positive depth control.