Sauer-danfoss Holding A/s

Danfoss Power Solutions Aps

Sauer Danfoss Aps

Peter Gade Peistrup

John Kristensen

Poul Ennemark

Tom Rudolph

Ole Vincentz S&oslash;rensen

Lars Mortensen

John B&oslash;rsting

John B&oslash;rsting Jensen

Ravi Kanbargi

A hydraulic steering device () is described comprising a supply port arrangement having a supply port (P) and a tank port (T), a working port arrangement having two working ports (L, R), a main flow path () between the supply port (P) and the working port arrangement, a return flow path () between the working port arrangement and the tank port (T), flow meter means () being arranged in said main flow path (), said flow meter means () comprising at least two flow meters () and a flow meter valve means (), said flow meter valve means () in a first operation mode connecting at least two flow meters () in parallel and in a second operation mode making inactive at least one flow meter (). Such a steering device should be operated comfortable for a driver. To this end an amplification flow path () is arranged in parallel to said main flow path (), said amplification flow path () being connected to said main flow path () downstream said flow meter means () in a direction from said supply port (P) to said working port arrangement.

Hydraulic steering device

A hydraulic steering arrangement with a steering handwheel which is connected with a hydraulic steering unit, and with a steering motor connected with a pump via a steering valve. In a steering arrangement of this kind, a simple construction is desired, though under maintenance of the required security. For this purpose, the steering valve can optionally be operated by a steering handwheel or by a hydraulic pressure generated by a control pressure generator.

Hydraulic steering arrangement

Hydraulic steering arrangement ( ) with a steering handwheel ( ), which is connected with a manual. pump ( ), a pump ( ) supplying hydraulic fluid, a steering motor ( ) and a steering valve ( ) arranged between pump ( ) and steering motor ( ) and having a valve element ( ) steering the flow of hydraulic fluid between the pump ( ) and the steering motor ( ), the valve element ( ) being displaceable by hydraulic pressures originating from the manual pump. In such a steering arrangement it is wanted to create the opportunity of implementing various functions, without having to abandon the ordinary hydraulic control. For this purpose, the valve element ( ) has an additional drive ( ).

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Nordborg, Denmark

Peter Gade Peistrup