Surgery – Truss – Pad
Patent
1977-05-23
1979-05-22
Recla, Henry J.
Surgery
Truss
Pad
1281426, 55432, 55459R, A62B 710
Patent
active
041553594
ABSTRACT:
There is disclosed an air filtering mask having a cyclone filter member attached to a mask body, the cyclone filter member including a hollow slotted cylinder section attached to the base end of a hollow frusto-conical section and a hollow vortex finder having a substantially cylindrical body and two ends, one end being radially connected and sealed to the interior wall of the hollow cylinder section and the other end being located within the base end of the hollow frusto-conical section, the cylindrical body of the vortex finder extending coaxially through and being uniformly spaced from the interior wall of the hollow cylinder section, the hollow cylinder section having a multiplicity of slots through the walls thereof, the multiplicity of slots being aligned to penetrate into the region between the hollow vortex finder and the hollow slotted cylinder section tangential to the interior wall of the hollow cylinder section, the frusto-conical section having an opening in the apex end thereof. The mask body has an exterior and interior, the interior being constructed and arranged to be worn over the nose and mouth of the wearer of the mask, and has an opening therethrough into which the hollow slotted cylinder section is attached, the multiplicity of slots being located exterior to the mask body whereby air enters into the slots and tangentially spirals through the cylinder section adjacent the interior wall thereof into the frusto-conical section such that particles contained in the air are centrifugally impinged against the interior surface of the frusto-conical section and forced out the opening in the apex end thereof, the tangentially spiralling air forming a central vortex of clean air, which is intercepted and transmitted into the mask body by the vortex finder when the wearer inhales thereby filtering the air.
REFERENCES:
patent: 2332662 (1943-10-01), Nathanson
patent: 3541764 (1970-11-01), Astrom
patent: 3807400 (1974-04-01), Cocozza
patent: 4038051 (1977-07-01), Ide
Madsen Raymond L.
Recla Henry J.
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