Intra-oral filtering device
OwnerJesse Althen Bevinsinventor
Life of this patent
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Abstract
An intra-oral filtering device for filtering and removing noxious materials from the air during the breathing process includes a housing having a cavity portion therein which contains a filter material for removing noxious materials from the air during the breathing process. The housing includes a mouth-piece portion and an exit portion communicating with the cavity portion to provide a path of travel for the air during the breathing process. The exit portion includes an unidirectional valve cover which permits purified air to pass through the intra-oral filtering device and which prevents saliva and expelled air from entering the intra-oral device through the exit portion.
Claims4
An intra-oral device for filtering and removing noxious materials from the air during the breathing process, including in combination:
- a U-shaped housing defining at least one cavity portion therein and having a mouth-piece portion located intermediate the ends of said housing, said mouth-piece portion having an opening therein for receiving unpurified air into said housing, said mouth-piece opening communicating with at least one of said cavity portions, said U-shaped housing having exit openings therein at each of the ends thereof, each of said openings further communicating with at least one of said cavity portions,
- filter means mounted in at least one of said cavity portions of said housing for filtering and removing noxious materials from the air passing through said filter means, and
- valve means mounted to said ends of said U-shaped housing and selectively engageable with each of the exit openings, said valve means being operable between an open position away from the opening to permit the exit of filtered air from said housing during inhalation and a closed position engaging the opening to prevent the entrance of spent air and saliva into said housing during exhalation.
Dependencies are inferred from the claim text.