Respirators

Details Respirators Respirators

1981-06-22

1983-12-13

Recla, Henry J.

Surgery

Respiratory method or device

Means for removing substance from respiratory gas

12820612, 12820616, D29 8, A62B 700

Patent

active

044199945

ABSTRACT:
The present invention relates to a respirator of the type called a filtering facepiece which is made from a flat pocket of flexible filtering sheet material having a generally tapering shape with an open edge at the larger end of the pocket and a closed end at the smaller end of the pocket. The closed end of the pocket is formed with fold lines defining a generally quadrilateral surface comprising triangular surfaces which are folded to extend inwardly of the pocket, the triangular surfaces facing each other and being, in use, relatively inclined to each other.

REFERENCES:
patent: Re29613 (1978-04-01), Kropfhammer
patent: 1292096 (1919-01-01), Schwartz
patent: 1523884 (1925-01-01), Leduc
patent: 1868281 (1932-07-01), Falkson
patent: 3971369 (1976-07-01), Aspelin et al.
patent: 4248220 (1981-02-01), White

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