Claas Selbstfahrende Erntemaschinen Gmbh

Caterpillar Sarl

Claas Industrietechnik Gmbh

Claas Material Handling Gmbh

Heinrich Dueckinghaus

Dirk Schlichting

Norbert Strieker

Helmut Claas

Robert Obermeier-Hartmann

Manfred Gersmann

Hendrik Schulze Zumkley

Heinrich Schneider

Markus Wiefel

Burkhard Seibel

Sven Bauer

Guenter Eis

Christian Ostfechtel

A device for the deaeration of a hydraulic fluid of a hydraulic system has at least one hydraulic motor arrangement and a hydraulic fluid storage which is hydraulically coupled with this hydraulic motor arrangement. A suction device for sucking out the hydraulic fluid is associated with the at least one hydraulic motor arrangement such that the suction device guides hydraulic fluid out of the hydraulic motor arrangement into the hydraulic fluid storage by means of vacuum pressure (&#x394;p). The suction device is constructed as a jet pump and is integrated in the return line between the hydraulic motor arrangement and hydraulic fluid storage.

Loading vehicle structure

A steerable crawler track for an agricultural utility vehicle such as a tractor or a self-propelled harvesting machine has a left-side track roller unit, a right-side track roller unit, a differential having a transmission input driven by an engine, a first transmission output for driving the left track roller unit, and a second transmission output for driving the right track roller unit and a hydraulic transmission having a variable transmission ratio (i). The transmission outputs of the differential are coupled to one another via the hydraulic transmission such that the ratio of the rotational speeds (n, n) of the transmission outputs are influenced by changing the transmission ratio (i) of the hydraulic transmission.

Steerable crawler track

A drive system for hydraulically driven working mechanisms of a working machine includes an axial piston pump, the pump capacity and flow direction of which is varied by changing the pivot angle of the axial piston pump. The drive system includes a hydraulic motor connected via a line to the axial piston pump and drivably connected to the working mechanisms, a control unit operated to set the pump capacity of the axial piston pump to zero and a control valve arrangement that is actuated by the control unit to actuate a limiting device such that the pivot angle of the axial piston pump can be mechanically set to zero degrees (0&#xb0;).

Drive system for hydraulically driven working mechanisms of a working machine

In vehicles designed to pick up and process crops, drive units affect the ground drive, which is an all-wheel drive, which acts on all of the wheels and/or track roller unit in contact with the ground, electronic controls and actuators perform the control and regulation of the drive units, and control units that control the drive torque at the wheels are used to obtain good traction and minimal slippage of the wheels on the ground. To control the drive torques, sensors are used at particular points, the signals and data of which are processed by the control device in order to predetermine a torque or intake volume requirement. The preselection of torque in the control results in the intake volume of the hydraulic drive motor being regulated. By specifying the intake volume required, it is possible to obtain optimal traction at one or more drive wheels, and to prevent undesired slippage of any one drive wheel in advance.

Electronic control for the drive unit of a vehicle

A hydrostatic machine, has first and second axial-piston units arranged on a common axis and having pistons which cooperate with an adjustable swash plates, wherein the first axial-piston unit has a first one of the swash plates associated with it while the second axial-piston unit has a second one of the swash plates associated with it, and a coupling mechanism which couples the first and the second swash plates mechanically and adjustably.

Hydrostatic machine

A hydraulic system for an agricultural working machine composed of a carrier vehicle and at least one adapting device has one or more hydraulically driven consumer included in each of the carrier vehicle and the at least one adapting device, and a common hydraulic pressure line, wherein the consumers are connected to the common hydraulic pressure line, and a constant hydraulic pressure is applied to the common hydraulic pressure line.

Hydraulic system for a self-propelled harvesting machine

The present invention is concerned with a work machine having a telescopic arm coupled to the front thereof. This arm is used for seating various sorts of frontal attachments and is raised and lowered by means of a hydraulic piston-cylinder unit. Now in order to ensure that an installed frontal attachment always rests on the ground with a pre-selected force, use is made of a pilot controlled seat valve and an adjustable pressure regulating valve which ensure that a constant pressure is maintained in the cylinder chamber formed below the base of the piston in the piston-cylinder unit when a constant supply of oil is fed to this part of the cylinder chamber. In consequence, this means that the installed frontal attachment always rests on the ground with one and the same force independently of whether the ground is flat or uneven. The frontal attachment thus precisely copies the contour of the ground at all times.

Growing community of inventors

Bielefeld, Germany

Heinrich Dueckinghaus