Patent ID: 7987527

Claim:
A device for transporting odor-containing air from a region including an interior airspace of a toilet bowl to a drain line that connects a water seal-type drain of the toilet bowl to a septic system, comprising: an air pump assembly having an air intake and an air exhaust, wherein the air intake is in fluid communication with the region; an exhaust tube assembly including an inlet and an outlet, wherein the outlet is substantially between a surface of a water seal and a portion of a drain ceiling furthest below a normal standing water level of the toilet bowl to prevent drain line and septic system air from entering the outlet; and a connecting channel, wherein the connecting channel is in fluid communication with the air exhaust and the inlet; wherein said air pump assembly has a positive displacement vane pump configured to create a low pressure region at the air intake and a high pressure region at the air exhaust to create a flow path for the odor-containing air and to overcome a head pressure exerted by water standing in a drain so that odor-containing air will be transported from the outlet into the drain line; and an air inlet conduit in fluid communication with the air intake; said positive displacement vane pump having an axis of rotation offset from a longitudinal axis of the air pump assembly, the air intake comprising the air intake opening nearest the vanes of said positive displacement vane pump, wherein the axis of the air intake opening is within a plane substantially perpendicular to the axis of rotation.