0589429-A1 is referenced by 38 patents and cites 5 patents.

A humidification chamber (1A) for a respiratory humidifier (30) in which a level of liquid water is maintained by the use of floats (2, 3) which actuate valves (8, 10 and 9, 11) to control the passage of water through a water inlet (4). Two floats (2, 3) are each provided with actuating mechanisms to separately control the respective valve members (10, 11). The separate valve members (10, 11) are covered by an elastomeric moulding (12, 21, 22) which couples the valve members (10, 11) and provides a seal. The valves (8, 10 and 9, 11) are co-axially aligned and the system provides improved safety by allowing for reliable operation in the case where one of the floats (2, 3) fails. An alternative embodiment of the dual valve construction is also disclosed.

Title
Humidifier with dual float valves.
Application Number
EP19930115269 19930922
Publication Number
0589429 (A1)
Application Date
September 22, 1993
Publication Date
March 30, 1994
Inventor
Sims David John
NZ
Assignee
Fisher & Paykel
NZ
IPC
A61M 16/00
F24F 06/00
A61M 16/10
F24F 06/00
A61M 16/16
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