Surgery – Respiratory method or device – Means for removing substance from respiratory gas
Patent
1983-09-28
1986-01-07
Recla, Henry J.
Surgery
Respiratory method or device
Means for removing substance from respiratory gas
A62B 700
Patent
active
045628378
ABSTRACT:
An air escape filter apparatus for emergency use by a person comprises a filter which is contained within a filter housing which is accommodated within a half mask portion of a breathing mask which is adapted to be engaged over the nose and mouth of a person. The half mask portion includes a sleeve portion having a guide ring which engages over the filter housing and is shiftable along the filter housing while remaining in holding engagement therewith. The filter housing is of a size so that it is retainable within the half mask portion in a standby condition at which time it is substantially coextensive in length with the half mask portion so that the two elements are accommodated within a very small space. The filter is extensible at the end of the sleeve portion to free the interior of the half mask for engagement over the wearer's face in a ready condition.
REFERENCES:
patent: 4154235 (1979-05-01), Warncke
patent: 4467795 (1984-08-01), Eckstein
patent: 4473072 (1984-09-01), Walther
Dragerwerk Aktiengesellschaft
Recla Henry J.
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