Breathing apparatus
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United States of America Patent
Stats
-
Mar 27, 2007
Grant Date -
Sep 2, 2004
app pub date -
Apr 8, 2002
filing date -
Jun 29, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An inhalation opening 6 and an exhalation-opening 4 are formed in the facepiece 2 of a breathing apparatus 1 and the openings can be closed with an inhalation valve 8 and exhalation valve 7, respectively. If a person wearing the breathing apparatus 1 inhales, the inhalation valve 8 is open and the exhalation valve 7 is closed. A photointerrupter 11 senses the closing operation of the exhalation valve 7 and supplies electric power to a motor 9 to drive a blower 16.
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