Keith J Patterson

US Patent:

20080245364, Oct 9, 2008

Filed:

Apr 3, 2007

Appl. No.:

11/730713

Inventors:

Keith Patterson - Alexandria VA, US

International Classification:

A62B 7/10
A62B 18/02
A62B 18/10

US Classification:

12820125, 12820118, 12820128

Abstract:

A respirator includes a first chamber, a second chamber, and a separator that separates the first chamber and the second chamber. A filtration system includes an inhale valve that only allows air to enter the respirator and an exhale valve that only allows air to exit the respirator. The system can be reversed so that the inhale valve and exhale valve may be positioned on either the first or second chamber. A replaceable filter can be provided that includes a supply canister including a supply of filter material, a take-up canister that receives used filter material, and a path between the supply canister and the take-up canister that guides the filter material across the respirator's inhale valve, exhale valve, or both the inhale and exhale valves.

US Patent:

20090065006, Mar 12, 2009

Filed:

Sep 7, 2007

Appl. No.:

11/898032

Inventors:

Keith Patterson - Alexandria VA, US

International Classification:

A62B 23/02

US Classification:

12820527

Abstract:

A filtration system for use in a respirator includes a base member including a chamber aperture, a rotating member including a filter that rotates with respect to the base member; and a cover with an inhale entry. The inhale entry and the chamber aperture create a path through which air enters the inhale entry, passes through the filter, and exits through the inhale chamber aperture.