Lung-venting apparatus

Details Lung-venting apparatus Lung-venting apparatus

1977-12-28

1979-09-11

Recla, Henry J.

Surgery

Truss

Pad

137843, 251367, A61M 1600

Patent

active

041671848

ABSTRACT:
A manually operated lung-venting apparatus includes a self-expanding bladder having a bladder inlet through which treating gas is drawn into the bladder during expansion thereof and a bladder outlet through which treating gas is driven out of the bladder during compression thereof. The apparatus further comprises a valve device having a housing attached to the bladder; and inlet chamber in the housing; a valve inlet for establishing communication between the bladder and the inlet chamber; a valve outlet which is in continuous communication with the inlet chamber and which is adapted to be connected to the respiratory system of a patient. The valve device further has a movable valve member which comprises a valve stem and a resiliently flexible, soft valve flap carried thereby and which is supported in the housing and cooperating with the valve inlet to open or close the same; and a control mechanism connected to the valve stem for moving and maintaining the movable valve stem in a closed position when the pressure in the inlet chamber exceeds a predetermined value above the ambient pressure and for moving and maintaining the valve stem in an open position when the pressure in the inlet chamber is below the predetermined value. The valve flap, in the closed position of the valve stem, readily conforms to the valve seat and, if the pressure in the inlet chamber exceeds that prevailing in the bladder, the valve flap lifts off its seat independently of the position of the valve stem.

REFERENCES:
patent: 1157655 (1915-10-01), Mayer et al.
patent: 2428451 (1947-10-01), Emerson
patent: 2902992 (1959-09-01), Renvall
patent: 3083707 (1963-04-01), Seeler
patent: 3106204 (1963-10-01), Paramelle
patent: 3262446 (1966-07-01), Stoner
patent: 3633605 (1972-01-01), Smith

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