Sewer pipe gas exhaust filter apparatus

Details Sewer pipe gas exhaust filter apparatus Sewer pipe gas exhaust filter apparatus

2011-01-11

2011-01-11

Rivell, John (Department: 3753)

Fluid handling

Diverse fluid containing pressure systems

Fluid separating traps or vents

C137S388000, C137S433000, C137S434000

Reexamination Certificate

active

07866334

ABSTRACT:
A sewer pipe gas exhaust filter apparatus includes a sewer vent valve unit connected to a sewer pipe and including a valve member moved into and out of engagement with a valve seat by a float member, a gas filter unit connected to the sewer vent valve unit and including a gas filter medium, and a gas flow valve arrangement to cause gases from the sewer to flow through the filter medium while bypassing air drawn into the sewer pipe past the gas filter unit. The filter medium of the gas filter unit removes chemical components from air and gas exhausted from the sewer pipe, thereby improving the odor of such exhausted gases.

REFERENCES:
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patent: 4770201 (1988-09-01), Zakai
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patent: 5846274 (1998-12-01), Smelser
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patent: 6379433 (2002-04-01), Scranton, Jr.
patent: 6848465 (2005-02-01), Ledbetter
patent: 2006/0185732 (2006-08-01), Katzman et al.

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