Title:
EXPIRATORY VALVE UNIT
Document Type and Number:
WIPO Patent Application WO2004101073
Kind Code:
A3
Abstract:
An expiratory valve unit comprises a body having a plurality of outlets and valve seats, and a rotary closure member having a plurality of blades each normally biassed against a respective seat to close the outlets and being rotatable relative to said body when under pressure from user exhalate impinging the blades to open the outlets.
Inventors:
DAMPNEY IAN (GB)
Application Number:
PCT/GB2004/002144
Publication Date:
March 24, 2005
Filing Date:
May 17, 2004
Export Citation:
Assignee:
HELMET INTEGRATED SYST LTD (GB)
DAMPNEY IAN (GB)
DAMPNEY IAN (GB)
International Classes:
A62B9/02; A62B18/10; (IPC1-7): A62B9/02; A62B18/10
Foreign References:
| US2553645A | 1951-05-22 | |||
| DE901134C | 1954-01-07 | |||
| US5355878A | 1994-10-18 | |||
| DE1115134B | 1961-10-12 | |||
| EP0699578A1 | 1996-03-06 |
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