Ostomy appliance
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Dec 9, 2003
Grant Date -
N/A
app pub date -
Feb 24, 2000
filing date -
Feb 26, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
An ostomy pouch (10) is described having an automatic pressure relief valve (82) which opens and closes automatically in response to the differential gas pressure across the valve to vent flatus. In one form, the valve comprises a diaphragm which seals against a seat by the use of a tacky gel or oil. The diaphragm is pinched towards one side and flexes as a flap. In one preferred form, the valve (84) is used in combination with a deodorizing filter (82). The filter may be mounted co-axially with the valve, or it may be mounted separately and offset from the valve. A sub-envelope assembly (80) is described carrying the valve (84) and the filter (82) and defining a buffer volume between the valve and filter to compensate for the different flow characteristics of the valve and filter.
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