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. 12, 2011
Filed:
Dec. 14, 2007
Thorkild Christensen, Soenderborg, DK;
Siegfried Zenker, Kirchseeon, DE;
Svend Erik Thomsen, Nordborg, DK;
Thorkild Christensen, Soenderborg, DK;
Siegfried Zenker, Kirchseeon, DE;
Svend Erik Thomsen, Nordborg, DK;
Sauer-Danfoss Aps, Nordborg, DK;
Abstract
The invention concerns a hydraulic valve arrangement () with a supply connection arrangement comprising a high-pressure connection (P) and a low-pressure connection (T), a working connection arrangement comprising two working connections (A, B), which can be connected to a motor (), a directional valve arrangement () located between the supply connection arrangement (P, T) and the working connection arrangement (A, B), and a compensation valve () acted upon in a first activation direction by a pressure in a first pressure chamber (), which is connected to a load-sensing pipe (LS), and, if required, by a spring (), and in a second activation direction opposite to the first activation direction by a pressure downstream of the directional valve arrangement (), said pressure acting in a second pressure chamber (), the compensation valve () having an inlet () and an outlet (). In connection with a post-compensated valve, it is endeavored to adjust the load pressures at the working connections (A, B) in dependence of the direction. For this purpose, each working connection (A, B) is connected to a control system, which amplifies the effect of the pressure in the first pressure chamber () on the compensation valve () in dependence of a pressure ruling at the working connection (A, B).