Back to results
US 2011/0030691 A1Published application
Air filtration apparatus and method
OwnerCecil E Campbellinventor
Life of this patent
Estimating the term…
Abstract
An air filtration apparatus is disclosed. During inhale response, user's breath opens a first air valve causing air flow through replaceable filter through a chamber to a mouth piece disposed in a user's mouth. During exhale response, user's breath closes first valve causing one or more exhaust valves to open. In one embodiment, inhale and exhale responses are displaced from one another to provide better isolation of replaceable filter.
Claims12
An air filtration assembly comprises:
- a first valve coupled to a first diaphragm to open and close in response to an inhale response of flow of a user's breath;
- and
- a second valve coupled to a second diaphragm to open and close in response to an exhale response of the flow of the user's breath.
An air filtration assembly comprises:
- a replaceable filter;
- a first valve operatively coupled to a first flapper to at least partially open in response to an inhale response of a user to allow air to enter the replaceable filter and to at least partially close in response to an exhale response of a user and to at least partially shield the replaceable filter during the exhale response;
- and
- a second and third valve operatively disposed orthogonally to the first valve and operatively coupled to a second and third flapper valves respectively to at least partially open in response to an exhale response of a user to exhaust air from the user.
1 more element
Dependencies are inferred from the claim text.