Patent · US Expired

Hydraulic dual circuit steering system

US6712176B2 · kind B2 · utility

5Cited by

8References

11Claims

0Family size

Assignee

Sauer-Danfoss Holding A/S · DK

Inventors

Siegfried Zenker · Kirchseeon, DE
Carsten Christensen · Avenue Madeleine, DK

Key dates

Filing date	Dec 27, 2000
Grant date	Mar 30, 2004
Priority date	—
Expiry date	Dec 27, 2020

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB62D5/30
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

The invention concerns a hydraulic dual circuit steering system with first circuit having a first control unit and a first steering motor connected with the control unit via working connections, a second circuit having a second control unit and a second steering motor connected with the control unit via working connections, a changeover valve, which in a first position activates the first circuit and deactivates the second circuit and in a second position activates the second circuit and deactivates the first circuit. To improve the steering behaviour, in the first position of the changeover valve the working connections of the second circuit and in the second position of the changeover valve the working connections of the first circuit are connected with a pressure source.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.