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:
Mar. 07, 1989
Filed:
Sep. 28, 1987
Steve A Junge, Johnston, IA (US);
Leon F Sanderson, Des Moines, IA (US);
Deere & Company, Moline, IL (US);
Abstract
Height sensing structure utilizing a pair of height sensing valves connected to height sensing shoes on two row harvesting units. The row harvesting units are transversely adjustable on support structure to accommodate different row spacings and to open up space between the units for service and inspection. The height control valves are connected by flexible conduit and a shuttle check valve to a lift cylinder, and interconnecting linkages between the height sensing shoes on adjacent units are eliminated so that the units may be freely adjusted. The shuttle valve assures that the height control valve sensing the highest ground condition controls the lift cylinder to prevent 'digging in'.