Tracheostoma valve
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United States of America Patent
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Feb 3, 2015
Grant Date -
Apr 19, 2012
app pub date -
Mar 31, 2010
filing date -
Apr 1, 2009
priority date (Note) -
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Abstract
A tracheostoma valve (1) comprises a main air passage structure provided with a main valve arrangement. The tracheostoma valve is switchable in response to a spurt of inhalation air from a breathing condition into a speaking condition, while the tracheostoma valve is switchable in response to a spurt of exhalation air from said speaking condition into said breathing condition. The main valve arrangement comprises an at least partly flexible bistable wall portion which has a circumferential bordering edge. At least part of the bordering edge forms a hinging means around which the bistable wall portion is hingeable between a first stable position in which an orifice of the main air passage structure is being blocked, and a second stable position in which said orifice is released.
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