BESTURINGSKLEPPENCOMBINATIE VOOR DE BEDIENING VAN EEN CILINDER-ZUIGEREENHEID.

摘要

A direction-control valve in which a poppet valve is caused to perform reciprocating movements under the influence of fluid pressure which is regulated, as regards its application to said poppet valve, by the positioning of a second valve. In one operative position of said second valve, a first exhaust port is closed by a first port closure means which moves in response to a fluid-pressure-drop thereacross in order to permit the supply of fluid under super-atmospheric pressure to one side of a double-acting cylinder, and a second exhaust port is opened by a second port closure means which moves in response to a fluid-pressure-drop thereacross in order to permit the exhaust of used pressurized fluid from the other side of said double-acting cylinder. In the other operative position of said second valve, the opening and closure of the first and second exhaust ports are reversed.