Patent · US Expired

Control device for a steering system

US6047628A · kind A · utility

1Cited by

5References

11Claims

0Family size

Assignee

CLAAS Selbstfahrende Erntemaschinen GmbH · DE

Inventors

Heinz Duckinghaus · Bielefeld, DE
Gunter Eis · Wickede (Ruhr), DE
Norbert Strieker · Verl, DE

Key dates

Filing date	Aug 25, 1998
Grant date	Apr 11, 2000
Priority date	—
Expiry date	Aug 25, 2018

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF15B2211/625
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The present invention relates generally to agricultural machinery and, more particularly, to a device for controlling a double-acting steering cylinder of a steering system, having two working connections of the steering cylinder, wherein the working connections are each connected by means of an input pipe or an output pipe to a valve unit, which comprises two switching valves that can be moved alternately into a first switching position and into a second switching position and the steering cylinder in the first switching position of the first switching valve admits a fluid at the first working connection and the steering cylinder in the second switching position of the second switching valve admits the fluid at the second working connection.

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