Inhalation devices

Details Inhalation devices Inhalation devices

1974-10-15

1976-12-07

Michell, Robert W.

Surgery

Truss

Pad

128210, 1281458, A61M 1600

Patent

active

039956253

ABSTRACT:
A device for providing a gas-air mixture to a patient in response to suction applied by the patient, comprising means defining an air inlet, a backward-facing step, an air passage for directing air past said backward-facing step, a non-return valve for controlling flow of air from said inlet to said air passage and a gas passage communicating with said air passage through at least one orifice adjacent to said backward-facing step.

REFERENCES:
patent: 2483698 (1949-10-01), Goodner
patent: 2897833 (1959-08-01), Seeler
patent: 2908270 (1959-10-01), Stanton
patent: 3083707 (1963-04-01), Seeler
patent: 3726274 (1973-04-01), Bird et al.
patent: 3850171 (1974-11-01), Ball et al.
patent: 3853105 (1974-12-01), Kenagy
patent: 3866622 (1975-02-01), Kasahara et al.

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