Lung-controlled valve for respirator masks having positive press

Details Lung-controlled valve for respirator masks having positive press Lung-controlled valve for respirator masks having positive press

1986-03-05

1989-01-10

Howell, Kyle L.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820426, 137495, 251 65, A62B 704

Patent

active

047966190

ABSTRACT:
In known lung-controlled valves, the positive pressure in a breathing connection is established by the fact that the control diaphragm of the valve is tensioned by spring force. There, however, the opening force brought about by the spring is greatest when the inlet valve is closed, while it is smallest when the inlet valve is completely open. To keep the opening force as small as possible with the valve closed, and to leave the opening force approximately unchanged with increasing opening of the inlet valve, a magnet is provided on the inside of the housing cover of the lung-controlled diaphragm and the control diaphragm comprises a magnetizable part which is held at a minimum distance from the magnet by spacers when the inlet valve is closed.

REFERENCES:
patent: 2704996 (1956-10-01), Brown
patent: 2951494 (1960-09-01), Holmes
patent: 2970602 (1961-02-01), Cupp
patent: 2972468 (1961-02-01), Ray
patent: 3039481 (1962-06-01), Schreiber et al.
patent: 3121552 (1967-02-01), Wilson
patent: 3232303 (1966-02-01), Cupp
patent: 3610237 (1971-10-01), Folkerth et al.
patent: 4606339 (1986-08-01), Walther
Walther, "Der neue DRAGER-Pressluftatmer PA 54 P/1800", Dragerheft, No. 306, pp. 16-22, (1978).

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