Advanced chemical/biological crew mask
AssigneeThe United States of America as represented by the Secretary of the Army
InventorsCorey M. Grove, Stephen E. Chase
Life of this patent
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Abstract
An improved crew mask for protection of a user against chemical and biological hazards is provided. The novel crew mask includes the following features: a facepiece that includes a hybrid face seal with both intern and flat seals, and at least one transparent lens positioned at the level of the eyes of the person; at least one inlet hose for delivery of filtered air operably connected to the facepiece; at least one exhaust one-way exhaust port for venting air from the crew mask; and a compact filter unit with a reduced airflow resistance relative to currently employed filter units.
Claims13
A crew mask for protection of a user against chemical and biological hazards, comprising:
- (a) a facepiece having a hybrid face seal, wherein said hybrid face seal comprises a single continuous seal having an intern seal adapted to surround and seal the user's chin, nose and mouth, contiguous with and transitioning into a flat seal adapted to extend on both sides of the user's face up to and across the user's forehead;
- (b) at least one transparent lens attached to said facepiece and adapted to be positioned at the level of the eyes of the user;
- (c) at least one inlet connection in said facepiece adapted to connect to a hose for delivery of filtered air;
- (d) at least one, one-way exhaust port in said facepiece for venting air from said crew mask;
- and
- (e) a compact filter unit connected to said facepiece for providing filtered air to said inlet connection.
Dependencies are inferred from the claim text.