Patent ID: 7685653
Filing Date: 2010-03-30
Classification: E03D

Abstract:
1. An odor extraction system comprising a fluid tank valve, primarily for extracting malodorous air from a toilet bowl and preventing bad odors from getting into the environment, comprising a fan driven by an electric motor, said fan being disposed in a pipe chamber that is located between the free end of a suction piece and an outlet piece, where said suction piece is adapted for connecting to the flush pipe of the toilet bowl and where said outlet piece is hermetically joined to the sewer pipe, with said pipe chamber comprising a fluid tank valve adapted for airtight closure, characterized by that the fluid tank valve is implemented as part of the pipe chamber, the fluid tank of the fluid tank valve contains a liquid and comprises a suction opening and an outlet opening, with a closing member being joined to said suction opening, said closing member having a free end at downstream extremity thereof, with said free end submerging into the liquid in the fluid tank to close the fluid tank valve, with said free end rising from said liquid under the effect of pressure difference caused by the rotation of the fan to open the fluid tank valve and transfer air from the toilet bowl through the fluid tank valve and to the sewer pipe.