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US 2004/0168689 A1Published application
Respirator
AssigneeKoken Co., Ltd.
InventorSatoshi Kuriyama
Life of this patent
Estimating the term…
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.
Claims3
A breathing apparatus, comprising:
- a facepiece with an inhalation opening and an exhalation opening formed therein;
- an inhalation valve disposed adjacent to said inhalation opening so as to be open during inhalation and closed during exhalation;
- an exhalation valve disposed adjacent to said exhalation opening so as to be closed during inhalation and open during exhalation;
- a blower driven by a motor for blowing the outside air into said facepiece through said inhalation opening;
- and
- a sensor which is sensitive to the opening or closing operation of said exhalation valve or inhalation valve,
- wherein power supply to said motor is controlled based on the signals from said sensor.
4 more elements
Dependencies are inferred from the claim text.