Respirator face mask

Details Respirator face mask Respirator face mask

1981-03-10

1983-11-15

Recla, Henry J.

Surgery

Respiratory method or device

Means for removing substance from respiratory gas

12820617, 12820624, 12820711, 12820712, 24590, 137854, A62B 700

Patent

active

044149735

ABSTRACT:
A respirator face mask formed from a silicone or other vulcanized rubber with a multi-compound curved face seal having a superior configuration for facial fit. The mask is held by four support buttons and two straps attached thereto having a reverse leverage pulldown effect to pull the mask into contact with the facial area. The four attachment means for the straps are eccentric buttons having an undercut that overrides a loop that can be easily disassociated when the attachment loop is reversed and pulled over the button. A concave configured sealing diaphragm on the exhalation valve provides for substantially uniform opening with less effort than is normally encountered in such valves. A staggered anti-inversion rib on the concave underside of the exhalation valve prevents the diaphragm from inverting to a convex configuration. The valve includes an exhalation valve stack and vent that can be covered at a sharply chamfered opening to provide for a pressure fit test. The inhalation port features two unique chamfered exterior rings which mate with a reverse chamfered cartridge. The inhalation valve is mounted on the threaded connector so as to form a slightly concave configuration to minimize the objectionable popping sound.

REFERENCES:
patent: 885033 (1908-04-01), Forse
patent: 1083925 (1914-01-01), Erickson
patent: 1705447 (1929-03-01), Hagen
patent: 2166164 (1939-07-01), Lehmberg
patent: 2341566 (1944-02-01), Monro
patent: 2744525 (1956-05-01), Whipple
patent: 2823671 (1958-02-01), Garelick
patent: 2858828 (1958-11-01), Matheson
patent: 2939458 (1960-06-01), Lundquist
patent: 3082767 (1983-03-01), Matheson
patent: 3473561 (1969-10-01), Svenson et al.
patent: 3680555 (1972-08-01), Warncke
patent: 4231361 (1980-11-01), Wise
patent: 4304230 (1981-12-01), Seufert

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