A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
137/1.5
A61M 16/00 (2006.01) A62B 19/02 (2006.01) A62B 23/02 (2006.01)
Patent
CA 1112979
BREATHING APPARATUS CHEMICAL CANISTER WITH DUST SEAL Abstract of the Disclosure A breathing apparatus chemical canister includes a central vertical tube, around which there is a body of chemi- cal granules covered by an upper sheet of filtering material provided with inner and outer downwardly extending flanges engaging the tube and the side of the canister. Disposed between the chemical body and filter sheet is an upper screen having inner and outer downwardly extending flanges pressing the filter sheet flanges against the tube and side of the canister to form seals. A similar lower sheet of filtering material and lower screen around the lower end of the tube support the chemical body, and the flanges of the lower screen press the filter sheet flanges against the tube and site of the canister to form seals.
342926
Mine Safety Appliances Company
Smart & Biggar
LandOfFree
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