A hydraulic feed assembly for a double-acting piston-cylinder device.

摘要

The piston-cylinder device (B) is e.g. adapted for tilting the cab of a motor vehicle. In order to prevent unauthorized tilting the feed assembly (A) has an additional connection conduit between pump (2) and reservoir (1), in which conduit a valve (6) is provided which must be closed by a signal which can only be given from inside the cab, before tilting is possible. The circuit for this signal may have pairs of contacts which are only closed if the vehicle drive is out of gear and/or the parking brake has been applied.