Surgery – Respiratory method or device – Means for removing substance from respiratory gas
Patent
1986-03-07
1986-12-16
Recla, Henry J.
Surgery
Respiratory method or device
Means for removing substance from respiratory gas
12820619, A61B 700
Patent
active
046289275
ABSTRACT:
A face mask in which an air filter insert is confined in place between mask components with a mask main member being at least partially reversible to facilitate filter insert replacement. A filter element, also of a pliable nature, fits within and conforms to the main member. A modified form of mask includes a main member having a liner portion which, during mask use, folds over and confines the filter element in place and, upon temporary unfolding of the liner portion, facilitates filter removal and replacement. Provision is made for support of a countercurrent exchange medium, such as a metallic sponge, within the mask. A modified mask includes a mesh member and a shell secured to the main mask member in a manner permitting the main member to be turned inside out. A further modified mask is of molded construction having an inwardly folded liner portion.
REFERENCES:
patent: 612295 (1898-10-01), Woodling
patent: 1292096 (1919-05-01), Schwartz
patent: 1410928 (1922-03-01), Knoblock
patent: 1925764 (1933-09-01), Le Duc
patent: 1946334 (1934-02-01), Schwartz
patent: 2070754 (1937-02-01), Schwartz
patent: 2112270 (1938-03-01), Cover
patent: 2201315 (1940-05-01), Lehmberg
patent: 4300240 (1981-11-01), Edwards
Givnan, Jr. James D.
Recla Henry J.
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