Mask
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United States of America Patent
Stats
-
Feb 26, 1985
Grant Date -
N/A
app pub date -
Oct 28, 1982
filing date -
Oct 30, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A mask in which an enclosure of an intake filtration chamber is partly or totally formed of a filtration medium so that a separate filtration medium need not be provided within the intake filtration chamber for replacement. The replacement of the filtration medium is effected by replacement of the entire intake filtration chamber. The invention provides a mask which is small in size and low in intake resistance and is free from a possible flow of contaminated air into the mask.
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