Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1980-08-18
1982-11-02
Recla, Henry J.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820113, 137334, 137DIG9, A62B 704
Patent
active
043568203
ABSTRACT:
A demand regulator for use in breathing apparatus including a housing, a diaphragm in the housing separating the interior into a first chamber in communication with the ambient and a second chamber, a breathing passage for the user in communication with the second chamber, a valve controlling the supply of pressure to the second chamber and a valve actuator connected to the valve and operatively associated with the diaphragm for operating the valve in response to changes in the pressure differential between the first and second chambers. At least one heat conducting element is located in the second chamber and has a first portion located to receive heat from the user's breath and a second portion in heat transferring relation to the connection of the actuator to the valve whereby heat is transferred from the user's breath to the valve and connection to the valve actuator for preventing freeze-up of the valve and actuator under cold ambient conditions.
REFERENCES:
patent: 3747598 (1973-07-01), Cowans
patent: 3863459 (1975-02-01), Rein
patent: 3898978 (1975-08-01), Marcus
patent: 4197841 (1980-04-01), Brauer et al.
patent: 4214580 (1980-07-01), Pederson
Recla Henry J.
Sherwood-Selpac Corporation
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