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:
May. 12, 1981
Filed:
Nov. 30, 1977
Applicant:
Inventor:
Horst Ziems, Harsewinkel, DE;
Assignee:
The Claas OGH, Harsewinkel, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B / ;
U.S. Cl.
CPC ...
91420 ; 91445 ; 91454 ; 91459 ; 137110 ;
Abstract
A hydraulic valve device for controlling a double action, piston-type servomotor adaptable for steering a self-propelled agricultural vehicle and including a pair of identical interconnected valve groups, with each group connected to an opposite side of the servomotor and further connected to a source of pressurized fluid and an exhaust outlet, whereby selective actuation of the hydraulic device creates a pressure difference in a servomotor forcing the piston to move in a predetermined direction.