Emergency bio-filter

Details Emergency bio-filter Emergency bio-filter

2008-06-17

2008-06-17

Smith, Duane (Department: 1797)

Gas separation

With recycle means

C055S339000, C055S340000, C055S356000, C055S467000, C055S472000

Reexamination Certificate

active

07387652

ABSTRACT:
A portable filter assembly for providing filtered air to an enclosed space includes a housing having an exhaust port connected to the enclosed space, an internal air intake port connected to the enclosed space, and an external air intake port connected to the outside of the enclosed space. A fan provides a partial vacuum to the internal and external air intake ports. A filter is located in the housing and the assembly is arranged such that the assembly simultaneously filters re-circulated air from the enclosed space through the internal air intake port and filters external air from the outside of the enclosed space through the external air intake port and filters the air to the enclosed space through the exhaust port.

REFERENCES:
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patent: 4784675 (1988-11-01), Leber et al.
patent: 5240478 (1993-08-01), Messina
patent: 5331991 (1994-07-01), Nilsson
patent: 5399319 (1995-03-01), Schoenberger et al.
patent: 5665128 (1997-09-01), Peters et al.
patent: 5761908 (1998-06-01), Oas et al.
patent: 6783578 (2004-08-01), Tillman, Jr.
patent: 2003/0101700 (2003-06-01), Burdine et al.
patent: 200292058 (2001-06-01), None

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