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:
Nov. 18, 1980
Filed:
Dec. 04, 1978
Clarence R Trott, Welland, CA;
David A Willer, Welland, CA;
Deere & Company, Moline, IL (US);
Abstract
A hydraulically operated conveying mechanism for a manure spreader composed of a fore-and-aft shiftable floor extension that is supported on a fixed floor of the spreader box and a transverse vertical push-off supported to shift fore-and-aft on the extension. First and second hydraulic cylinders are used to shift the floor extension and push-off respectively and includes a first cylinder and associated rod with the latter being composed of inner and outer concentric tubes closed at their respective ends and with the inner tube opening into the closed end of the cylinder. The outer tube has a port opening into the cylinder. The second double-acting cylinder that operates the push-off has its opposite ends in fluid communication with the inner tube and outer tubes. A shuttle valve within the main cylinder shifts axially to close the port as fluid is introduced to the closed end of the main cylinder and opens the port as the rod approaches its fully extended position.