Abstract: A hydraulic control valve has a two position body shifted by rotation. The shaft of the valve body carries a drive wheel segment extending through an arc that corresponds to the shift angle of the valve. A spring is provided to bias, at least in the final stage of rotation in either direction, the wheel segment in the opposite direction of rotation. This enables the valve body to be positioned into the other position in a reliable manner.

Abstract: Locking arrangement of a fluid insertion connection between a fluid line and a connection member, in particular between a hydraulic line and a hydraulic cylinder, the fluid line having an insertion part at one end and the connection member being provided with an insertion opening which is open at the circumferential surface of the connection member and receives the insertion part of the line. Furthermore, locking means are provided, which engage on an abutment surface of the insertion part of the fluid line in order to prevent the insertion part of the line from being pulled out of the insertion opening.The locking means comprise a ring, which is positioned around the connection member at the position of the insertion opening and is movable with respect to the connection member.

Abstract: A radial piston pump with pistons which pump into a circumferential pressure passage has the passage sealed on its outer side by a plastic annular member of a trapezoid-shaped cross-section. The longer parallel side of the cross-section faces radially inwardly and includes a circumferential groove for receiving a resilient O-ring which biases closed pressure valves located between the pistons and the passage. The annular member is adapted to be inserted radially inwardly into the circumferential pressure passage by expanding it and allowing it to contract into the passage. A radially inner side of the circumferential passage is, at a location between two adjacent cylinders, connected to a passage that extends radially inwardly and that is connected to an axial passage that leads to a pressure connection.