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:
Feb. 12, 1991
Filed:
Apr. 27, 1989
Applicant:
Inventor:
Joachim Neumann, Lohr/Main, DE;
Assignee:
Mannesmann Rexroth GmbH, Lahr, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F15B / ;
U.S. Cl.
CPC ...
91361 ; 91459 ; 13762525 ;
Abstract
The object of the invention is to improve the position and feed or advance regulation of a hydraulic drive which is controlled by a proportional valve. In a first compensation circuit the flow characteristic of the proportional valve is linearized to obtain very small feed rates and a high control amplification. In a second compensation circuit the positioning error of the drive arising from the necessary overlapping of the proportional valve is compensated.
Neumann, Joachim. (1991). Circuit arrangement for position and feed control of a hydraulic cylinder (U.S. Patent No. 4991491). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4991491
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