Abstract: A vehicle with a hydraulic transformer including a forward propulsion valve and a reverse propulsion valve connecting a common low-pressure rail respectively to a first motor line and a second motor line, which propulsion valves have a spring to hold the valve in a first position wherein it acts as a check valve blocking the flow to the common low-pressure rail and an actuator that can switch the propulsion valve to a second position connecting the common low-pressure rail to one of the motor lines.

Abstract: An axial bearing between a first part and a second part that presses with an axial load against the first part and can rotate around a rotation axis relative to the first part comprising a circular or arc-shaped ridge on the first part centered around the rotation axis, a pressure source for providing pressurized hydraulic fluid on a first side of the circular or arc-shaped ridge, an adjustable gap between the circular or arc shaped ridge and a bearing surface on the second part, wherein the pressurized hydraulic fluid flows through the adjustable gap to a second side of the circular or arc-shaped ridge. In accordance with the invention the circular or arc-shaped ridge or the bearing surface include a ridge chamber for locally creating a larger adjustable gap between the circular or arc-shaped ridge and the bearing surface.

Abstract: The invention concerns a variable pump or hydraulic motor with a drive shaft with a first axis of rotation and first plungers connected to the drive shaft and rotatable around the first axis of rotation. A port plate mounted in the housing can rotate around an axis intersecting the first axis, for adjusting the stroke volume. The port plate positioning drive comprises two counter-acting hydraulic actuators acting on the port plate in the direction of the first plungers.

Abstract: The invention relates to a hydraulic device having, in a housing, a rotor, which can rotate about a first axis, with pistons and chambers on both sides of the rotor, which can rotate about a second axis and are formed by a cylindrical wall and a piston. The cylindrical walls are rotatable about a second axis (m1 and m2) and the first axis, such that, during rotation of the rotor, the volumes of the rotor chambers on one side of the rotor and the rotor chambers on the other side of the rotor alternatively have a minimum value.

Abstract: The invention concerns a hydraulic device with a housing and a rotor which can rotate in the housing and has fixedly mounted pistons. Around the piston there are drum sleeves which each, together with a piston, form a chamber of variable volume and which are supported by a drum plate with an axis which intersects the axis of the rotor at an angle. Clamping means hold the drum sleeve against the drum plate and the clamping means are designed in such a manner that the drum sleeves can make a movement along the drum plate which is double of the radial movement which occurs in the event of synchronous rotation between the drum plate and a drum sleeve.

Abstract: The invention relates to a hydraulic device having, in a housing, a rotor, which can rotate about a first axis, with pistons, drum sleeves, which can rotate about a second axis and have a chamber formed by a cylindrical wall and a piston. Between the housing and the drum sleeves there is a face plate. The chamber is connected to a line connection via a first passage, of which a face-plate port forms part. Between the face plate and the drum sleeve there is a drum plate which can rotate with the drum sleeves and has drum ports which form part of the first passage.