03982095 is referenced by 172 patents and cites 12 patents.

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.

Title
Respiratory humidifier
Application Number
5/403507
Publication Number
3982095
Application Date
October 4, 1973
Publication Date
September 21, 1976
Inventor
Thomas C Robinson
Berkeley
CA, US
Agent
Lothrop & West
Assignee
Searle Cardio Pulmonary Systems
CA, US
IPC
B01F 3/04
A61M 15/00
H05B 1/00
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