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:
Jun. 30, 1992
Filed:
Aug. 20, 1991
Myron L McCunn, Orion, IL (US);
Donald K Landphair, Bettendorf, IA (US);
Richard M Neyrinck, Port Byron, IL (US);
Richard A DePauw, Moline, IL (US);
William R Lundie, East Moline, IL (US);
Douglas P Brown, Bettendorf, IA (US);
Jeffrey A Hoffman, Westerville, OH (US);
Frank D Tenne, Ivyland, PA (US);
Patrick D Holverson, Ahwatukee, AZ (US);
Keith Woodruff, Mountainside, NJ (US);
Deere & Company, Moline, IL (US);
American Cyanamid Corp., Stamford, CT (US);
Abstract
A closed granular chemical handling system comprising a dispensing valve and a receiving valve. The dispensing valve and the receiving valve are automatically opened when the valves are coupled together, and are automatically closed when the valves are uncoupled from one another. The valves are configured so that the receiving valve always is the first to open and the last to close. The valves are driven together by a camming structure having a neutral portion that acts as a delay between the opening and closing of both valves so as to allow granular material to flow from between the valves through the receiving valve.