Respiratory mask
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United States of America Patent
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Feb 27, 2018
Issued Date -
N/A
app pub date -
Aug 14, 2014
filing date -
Sep 4, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A respiratory mask includes a frame and an elbow engaged with the frame. The frame has a front surface and a rear surface. The front surface defines a connecting hole. The rear surface defines a receiving chamber. The connecting hole is in communication with the receiving chamber. The connecting hole is in communication with the receiving chamber at the rear surface. The elbow has a first end portion. The first end portion is connected with the connecting hole. The first end portion and the frame cooperatively define at least one air flow path communication air in the receiving chamber with external air.
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