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. 04, 2011
Filed:
Oct. 19, 2006
Osamu Shimizu, Tokyo, JP;
Yuji Hiroto, Tokyo, JP;
Keisuke Ikeda, Tokyo, JP;
Fuyuki Ogaki, Hokkaido, JP;
Osamu Shimizu, Tokyo, JP;
Yuji Hiroto, Tokyo, JP;
Keisuke Ikeda, Tokyo, JP;
Fuyuki Ogaki, Hokkaido, JP;
Ebara Corporation, Tokyo, JP;
Abstract
The present invention provides a check valve for use in a vacuum sewage pipe. The check valve includes a body having a sewage inlet and a sewage outlet to be coupled to the vacuum sewage pipe, a flap valve element disposed in the body and rotatably supported by a first shaft, and a closing mechanism. The closing mechanism can keep the flap valve element in a closed state so as to allow the flap valve element to function as a gate valve. The closing mechanism can also limit an opening degree of the flap valve element so as to allow the flap valve element to function as a check valve.