Abstract: A foot brake valve (2?) of a pneumatic brake system in a motor vehicle has an installation plate (4?), on which a brake pedal (14) is pivotably mounted and to which a housing (18?) of a control unit (16, 26) is fastened. A spring-loaded plunger piston (36) in actuating contact with the brake pedal (14) is guided axially movably in an annular collar (50) projecting upward out of the installation plate (4?). For fastening the housing (18?) of the control unit (16, 26) to the installation plate (4?), the housing (18?) has an intermediate flange (48) which is screw-connected to the main part of the housing (18?) and has the annular collar (50). The intermediate flange (48) is coaxially rotatably about a vertical central axis (32), and is connectable in non-positively locking fashion to the installation plate (4?) via a releasable clamping connection (62).

Abstract: A hydraulic motor unit including a hydraulic motor (1?) which is connected to two working lines (3,4). The swiveling angle (?) of the hydraulic motor (1?) is adjustable by an adjusting unit (7) which is provided with a regulating piston (8) having two piston surfaces (9, 10). The regulation pressure acting on a first piston surface (10) in a regulation pressure chamber (12) can be adjusted by a control valve (13). The control valve (13) adjusting the regulation pressure is movable between two final positions. The pressure of a working line (3, 4) is applied to a first measuring surface (23) of the control valve (13) adjusting the regulation pressure while a second, opposite measuring surface (25) of the control valve (13) is impinged upon by a control pressure piston (34) at a force that depends on the control pressure only once a threshold value of a pipe (28, 18?) supplying control pressure has been exceeded.

Abstract: The invention relates to a control and adjustment system for a lifting mechanism (100) of a loading blade (6) in a mobile machine tool. Said lifting mechanism is made up of at least one first and second blade cylinder (1, 2), at least one first and second lifting cylinder (61, 62) and one first and second hydropump (15, 75) which can be adjusted with regard to the pump volume. The adjusting pistons (3, 5) which can be displaced in the first and second blade cylinders (1, 2), respectively, separate both blade cylinders (1, 2) into two adjusting pressure chambers (7 and 8, 9 and 10). The adjusting pistons (63, 65) which can be displaced in the two lifting cylinders (61, 62) respectively separate the two lifting cylinders (61, 62) into the two adjusting pressure chambers (67 and 68, 69 and 70) in an analogous manner.