Abstract: A device for controlling a fluid volume in shape changing elements of vehicle seats has a sliding valve connectable with a fluid pressure source and with shape changing elements for filling the shape changing elements with fluid and discharging fluid from the shape changing elements, the sliding valve having a housing provided with connecting openings for a corresponding one of the shape changing elements and a control slider movable in the housing relative to the connecting openings, the control slider having at least one control opening cooperating with the connecting openings and at least one connecting passage which opens in the control opening and is loadable with fluid from the fluid pressure source, the control slider being formed as an axial slider which is guided on the housing, the axial slider having an axial displaceably sliding head provided with the at least one control opening and the at least one connecting passage and a slider rod rigidly connected with the slider head for axial displacement

Abstract: A device for controlling a fluid volume in shape changing elements of vehicle seats has a sliding valve connectable with a fluid pressure source and with shape changing elements for filling the shape changing elements with fluid and discharging fluid from the shape changing elements, the sliding valve having a housing provided with connecting openings for a corresponding one of the shape changing elements and a control slider movable in the housing relative to the connecting openings, the control slider having at least one control opening cooperating with the connecting openings and at least one connecting passage which opens in the control opening and is loadable with fluid from the fluid pressure source, the control slider being formed as an axial slider which is guided on the housing, the axial slider having an axial displaceably sliding head provided with the at least one control opening and the at least one connecting passage and a slider rod rigidly connected with the slider head for axial displacement

Abstract: The invention concerns a closing and opening apparatus for the filling opening of the tank of a motor vehicle. This includes a drive element for the opening and closing of a tank cap (3) functioning in conjunction with a filling opening (2) of a motor vehicle, a lever drive follower for the drive element and a control apparatus (100) with which the drive element is controllable from the interior of the motor vehicle space, especially from the driver's seat.

Abstract: A checkvalve (1) is provided with an inlet which can be connected to an operating system requiring a negative pressure, e.g. to a braking force amplifier (17), an outlet (3) which can be connected to a negative-pressure system producing a negative pressure, a main air channel (4) connecting the inlet and the outlet in a fluid manner and enabling an air flow in the direction of the outlet, a first checkvalve (9) installed in the main air channel (4), a single outside-air channel (5) which branches off downstream of the first checkvalve (9) and lets out into the atmosphere and a cross-sectional narrowing (7) in the manner of a venturi pipe (6), a venturi channel (8) connecting the cross-sectional narrowing (7) upstream of the first checkvalve (9) to the main air channel (4) and a second valve (10) located between the inlet (2) and the cross-sectional narrowing (7) in the main air channel (4) or in the venturi channel (8).