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. 22, 1982
Filed:
Jun. 05, 1980
Applicant:
Inventor:
William C Swanson, Clarendon Hills, IL (US);
Assignee:
International Harvester Co., Chicago, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
A01B / ;
U.S. Cl.
CPC ...
280 4323 ; 91515 ; 137 99 ; 172413 ;
Abstract
An agricultural implement having a frame with a pair of wheel assemblies capable of being rotated on the frame by a pair of hydraulic rams to raise and lower the frame relative to the ground. A direction control valve is connected to one end of the ram cylinders and the other ends of the ram cylinders are connected to the direction control valve through a rotary flow divider. A spring-seated check valve is connected across each of the metering gear sets of the rotary flow divider to permit flow to be diverted from a fully extended ram to one that is not yet fully extended.