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:
Jul. 13, 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 ; 91518 ; 137 99 ; 172401 ; 172413 ;
Abstract
A hydraulic circuit for synchronous lift of an implement having a center frame and flexibly connected left and right wing frames, each frame having an independent wheel assembly for raising and lowering the associated frame. A rotary flow divider is provided in a parallel connection of hydraulic rams to actuate the wheel assemblies. The flow divider has a section sized to provide the necessary flow to each ram so that all frames are raised and lowered in unison.