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:
Aug. 14, 1990
Filed:
Jul. 18, 1989
Applicant:
Inventor:
Heinrich Duckinghaus, Bielefeld, DE;
Assignee:
Claas OHG, Harsewinkel, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B62D / ;
U.S. Cl.
CPC ...
180-67 ; 180132 ;
Abstract
A control device with a steering control block in which four hydraulic control valves, controllable in pairs by means of a spool valve, together with reversing valves, adjustable by the spool valve, are disposed and are connected with forward and reverse controlling control connectors of a right and a left drive. The spool valve is activated by a steering wheel and a drive lever; the drives are differentially charged in an analog steering sense. The control device is suitable for tracked vehicles.
Duckinghaus, Heinrich. (1990). Control device for differential speed steering of a vehicle (U.S. Patent No. 4947948). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4947948
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile