Zf Friedrichshafen Ag

Olaf Langwald

Ulf Lang

Mario Holder

Frank Schuhmacher

A drain valve for draining liquid out of a container which comprises an essentially cylindrical opening that passes through a thickened area of the container wall, with an internally threaded section formed at an outer end thereof, followed by an interior space with a larger diameter into which a duct opens, and opposite the interior space an inner section with a smaller diameter opens into the container. A step is provided between the interior space and the inner section and serves as the seat for an associated end face of the valve element. A step between the interior space and the bore, on the one hand, and the inner end face of the valve element, on the other hand, are designed to co-operate as a valve seat which progressively opens and closes as the valve element is displaced.

Drain valve

An actuating device () or a clutch () of a motor vehicle () comprising one electric motor (), one gearing () which converts rotational motion of the electric motor () into a translatory motion and one accumulator (). The converter gearing comprises one recirculating ball spindle (). The accumulator () is at least partly situated within the recirculating ball spindle (), and at least parts () of a displacement sensor () are situated within the recirculating ball spindle ().

Growing community of inventors

Munich, Georgia

Olaf Langwald