B Urkert Gmbh

Otto Gottel

An electromagnetic valve for handling fluid media has a valve mechanism which includes at least one valve seat and a valve-closing member which cooperates with the valve seat or seats. The motion of the valve-closing member is controlled by linkage that is connected to the moving arm of an electromagnet, while a return spring urges the armature in the direction opposite to the magnetic force. In order to permit the seating of the armature against a stop at the limit of its energized travel, while exerting a calibrated force on the valve seat, the armature is permitted to travel beyond the point at which the valve-closing member is arrested. The additional motion of the armature takes place against the force of an auxiliary spring which compresses during that part of the motion. When the coil is de-energized, the auxiliary spring urges the armature back into direct contact with the linkage, whereafter the motion transfer is loss-free.

Electromagnetically actuated valve

An electromagnetic valve is equipped with a signal generator which operates in dependence on the positions assumed by the internal valve mechanism and which represents a relatively small unit which is attached in various positions to the housing of the magnetic actuator mechanism of the valve. The signal generator has at least one electrical switch which is actuated mechanically by a pin which transmits the motions of the armature to the switch without any appreciable interference with the operation of the magnetic mechanism. The switch is mounted within a housing on an insert which may be located in various positions relative to the housing and may suitably be a microswitch. Thesignal generator housing is sealingly attached to a mounting bracket which, in turn, is mounted on the housing of the magnetic actuator of the valve. The passage of the actuating pin is sealed against the outside by appropriate seals. The signal generator housing may include a transparent, possibly colored window or lens behind which is disposed a lamp which is actuated by the switch. The lamp and its load resistor are held in appropriate recesses of the switch insert, the position of which relative to the mounting bracket is secured by a guide pin.

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Ingelfingen, Germany

Otto Gottel