Frustum layered canister

Details Frustum layered canister Frustum layered canister

1993-12-30

1997-08-26

Bahr, Jennifer

Surgery

Respiratory method or device

Means for removing substance from respiratory gas

12820527, 12820528, 12820529, A62B 710

Patent

active

056601735

ABSTRACT:
A cylindrical canister or respirator filter for use in conjunction with a s mask for individual protection against respiratory hazards, including a frustum shaped carbon bed and a layered array of different size carbon particles in the carbon bed. The interior wall of the canister or respirator is dimpled to afford greater packing density of the carbon particles, and the carbon particles have hollow rectangular or cylindrical extrudate shapes. A chromium-free carbon is used to reduce health risks to users.

REFERENCES:
patent: 1654925 (1928-01-01), Drager
patent: 1789262 (1931-01-01), Monro et al.
patent: 1963874 (1934-06-01), Stampe
patent: 2195563 (1940-04-01), Fils
patent: 3566867 (1971-03-01), Dryden
patent: 4098270 (1978-07-01), Dolby
patent: 5400780 (1995-03-01), Nishino
patent: 5492882 (1996-02-01), Doughty

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