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:
Oct. 19, 2004
Filed:
Apr. 02, 2003
Poul Henning Holm Pedersen, Sonderborg, DK;
Jørgen Clausen, Sonderborg, DK;
Bjarne Schmidt, Augustenborg, DK;
Sauer-Danfoss ApS, , DK;
Abstract
A hydraulic steering system ( ) with a supply connection arrangement, having a high-pressure connection (P) and a low-pressure connection (T), and with a working connection arrangement (L, R), a directional valve ( ) and a metering pump unit ( ) being arranged between the supply connection arrangement and the working connection arrangement, the metering pump arrangement having at least two hydraulically parallel-connected and mechanically parallel-operated metering pumps ( ) with a shut-off valve ( ) in a hydraulic connection between the two metering pumps ( ), said shut-off valve ( ) having a return spring ( ) and a first control inlet ( ) that is connected with the high-pressure connection (P).