Respirator
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United States of America Patent
Stats
-
Apr 26, 1988
Grant Date -
N/A
app pub date -
Oct 17, 1986
filing date -
Oct 17, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The device relates to a mask worn over a wearer's face for air filtration. The mask has an inturned lip that forms a seal on the edge of the mask with the wearer's face. The mask also has at least two other contact surfaces, internal to the edge seal, which vary in length to increase the seal integrity of the mask. The mask has an exhalation valve in the front in direct line of expelled breath and a plurality of horizontal pleats below the exhalation valve such that the wearer can talk without substantial movement of the sealing edge. The mask also has two inhalation valves on each side, over the cheeks, to allow air to enter the mask.
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