the advantage of diaphragm valve
A diaphragm Valve for a respirator is provided with a gas feed line, which leads in a valve housing into a valve chamber and ends in a valve seat. A gas outlet line leads out of the valve chamber. A valve body spans over the valve chamber. With the valve body the valve seat can be closed and the flow of gas from the gas feed line into the gas outlet line can be interrupted. With the valve body a control chamber is formed within the valve housing, separated from the valve chamber. A closing cover closes a cylindrical control chamber end of the valve housing. A cylindrical, flexible sealing washer is connected with the valve housing in one piece. The cylindrical, flexible sealing washer is provided at the control chamber end. A cylindrical wall section of the closing cover is designed as a wall section that can be inserted into the sealing washer with a press fit.
The advantage of the diaphragm Valve according to the present invention is essentially that a cylindrical circumferential joint, which is connected with the valve housing in one piece, and into which a cylindrical wall section of the closing cover is inserted with press fit, is provided at the outwardly directed end of the control chamber. Both the valve housing and the circumferential joint consist of an elastomer material, so that the circumferential joint can be injection molded directly on the valve housing. The wall thickness of the circumferential joint is selected to be such that it is slightly stretched during the insertion of the closing cover and is sealingly in contact with the cylindrical wall section of the closing cover as a result.
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