The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 29, 2013
Filed:
Feb. 17, 2010
Kurt Sture Birger Ericson, Schilde, BE;
Han Sin Low, Sungei Buloh, MY;
Kurt Sture Birger Ericson, Schilde, BE;
Han Sin Low, Sungei Buloh, MY;
Studor S.A., Luxembourg, LU;
Abstract
The closing and sealing device for use in air admittance valves includes a valve housing () designed to be connected to the waste water pipe system, an upper cap () and a valve closing and sealing device which includes a fixed valve seat () and a movable closing member (). The housing () includes at least one passageway () in communication with the surrounding atmospheric air, and at least one passageway () in connection with the inner space () of the sewage system, each of the passageways being in contact with the movable closing member (). The closing device includes a rigid movable closing member in the shape of a poppet valve () having an inverted bowl shaped central part () provided, at its periphery, with an inverse angled conical surface () extending upwards and designed to co-operate with the sealing device which includes a fixed valve seat () having an upper edge provided with a soft annular seat () presenting a thin annular cantilever lip () extending towards the center of the seat ().