A hydraulic actuating device, for example for a retractable hard-top of a convertible car, comprising a double-acting hydraulic actuator, the first connection of the actuator being in communication with an associated throttling assembly which is designed t...

The device has at least one actuator (A-C), each for moving A roof unit part, a pump (15) with an outflow port and an induction port connected to a hydraulic liquid tank (14). The outflow port is connected to a channel connected to the actuators with a flo...

A drive assembly for driving a moveable component (2,63,64) of a vehicle (1,60). The component can adopt one or more positions in which the component prevents access to the vehicle or a part of the vehicle. The drive assembly comprises an actuator (30) whi...

The operating device has a working cylinder (1) with two working cavities (2, 3). These cavities can if necessary be directly connected to each other via a switchable two-position valve (11) so that the element to be operated can be set virtually without r...