Non-rebreathing valve and valve element therefor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 26, 1996
Grant Date -
N/A
app pub date -
Sep 26, 1994
filing date -
Sep 26, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A duck-bill valve element and a non-rebreathing valve (NRV) incorporating same. The duck-bill valve element is formed of flexible, resilient material and includes a peripheral portion continuously and sealingly attached to a housing of the NRV and a sealing portion contiguous with and extending radially inwardly of the peripheral portion, whereby the sealing portion is operable to releasably contact an internal valve seat of the valve housing. A hollow, wedge-shaped formation is contiguous with and projects from a first surface of the sealing portion. The wedge-shaped formation has a base defining an opening in the sealing portion and a distal end terminating in a slot. The valve element further includes integral structure for preventing inversion of the wedge-shaped formation under pressure applied to the wedge-shaped formation. The duck-bill valve element and the NRV may be employed in a breathing apparatus gas flow circuit between a source of respiratory gas and a patient interface component such as a respiratory mask.
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