Electric heating – Heating devices – Resistive element: igniter type
Patent
1973-10-04
1976-09-21
Bartis, A.
Electric heating
Heating devices
Resistive element: igniter type
128193, 219275, 219362, 219433, 261122, 261142, 261DIG65, H05B 100, A61M 1500, B01F 304
Patent
active
039820955
ABSTRACT:
A respiratory humidifier has a base with a thermally controlled heater therein effective to heat a first transfer surface on the top of the base. Removably pressed against the first transfer surface is a second transfer surface forming the bottom of a container into which liquid is admitted, close to the bottom, by a float valve to establish a liquid level. Gas is admitted to the container below the liquid level through an inlet tube and is released from the container above the liquid level through an outlet tube. A porous pad in the container is in the gas flow path between the inlet tube and the outlet tube to provide extended, wettable surface. A float blocks the entrance to the outlet tube when the liquid level rises unduly and a normally closed shunt passage between the inlet tube and the outlet tube opens by differential pressure when the entrance to the outlet tube is blocked.
REFERENCES:
patent: 1116931 (1914-11-01), Schutt
patent: 1373072 (1921-03-01), Holmberg
patent: 1664333 (1928-03-01), Taylor
patent: 2082363 (1937-06-01), Stone
patent: 2164881 (1939-07-01), Meyerson
patent: 3659604 (1972-05-01), Melville et al.
patent: 3757082 (1973-09-01), Goicoechea
patent: 3804280 (1974-04-01), Van Amerongen et al.
patent: 3806102 (1974-04-01), Valemta et al.
patent: 3864440 (1975-02-01), Goicoechea
Bartis A.
Searle Cardio-Pulmonary Systems Inc.
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