Druckluftbetriebene Kolbenpumpe,insbesondere Druckfluessigkeitspumpe fuer hydraulische Winden

摘要

This invention relates to a compressed-air pump which has a compressed-air motor and operates with compressed air and has a cylinder and a cooperating block or head therefor. A piston moves forward and backward in the cylinder space. The supply of compressed air to the motor is controlled by a valve movable between first and second positions in a bore of the block. The block is formed with passageways for supplying compressed air to the piston when it is in one position in the cylinder space and the valve body is in its first position, and for terminating such supply of compressed air when the valve body moves to its second position responsive to the supply of compressed air. In the second position of the valve body communication is established between the cylinder space and the atmosphere. In order to reduce malfunction of the compressed-air motor all of the compressed air supply passageways are formed in the block and the valve body is characterized by the absence of passageways.