Surgery – Respiratory method or device – Including body or head supported means covering user's scalp
Patent
1985-06-12
1987-03-10
Recla, Henry J.
Surgery
Respiratory method or device
Including body or head supported means covering user's scalp
2434, 2429, 351154, 351 47, 350257, A62B 700
Patent
active
046483942
ABSTRACT:
A viewing assembly for use in the lens opening of a protective facemask comprising: a transparent housing adaptor sealingly mated to the lens: a substantially rectangular retainer for a lens cartridge assembly comprising opposing planar panels and providing in the latched position a recess that sealingly retains an enclosed lens cartridge assembly; an open area in each of said planar surfaces providing a common portal for viewing through the holder body; a lens cartridge holder defining a first open frame portion the outer periphery of the assembly being adapted to sealingly engage the inner surface of the holder adaptor; a first transparent lens positioned within said housing and abutting the assembly flange and positioned so as to provide sealing contact therewith; at least one other similarly configured lens adapted to adjoin the first lens yet being removable therefrom by manual manipulation; and at least one flexible strip secured to each of the removable lenses and at its other extremity being of a sufficient length to permit manual grasping, thereby serving to permit removal of a lens from its peripheral retention by said lens holder.
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patent: 4563065 (1986-01-01), Kreissl
Mine Safety Appliances Company
Recla Henry J.
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