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:
Mar. 21, 2006
Filed:
Apr. 07, 2004
Osamu Shimizu, Tokyo, JP;
Isamu Kamata, Tokyo, JP;
Osamu Shimizu, Tokyo, JP;
Isamu Kamata, Tokyo, JP;
Ebara Corporation, Tokyo, JP;
Abstract
The present invention provides a vacuum valve controller for opening and closing a vacuum valve mounted on an end of a pipe of a vacuum system that is part of a vacuum sewage system. A vacuum valve controller includes a pressure sensor for converting a water level of sewage in a sewage pit into a pressure, a vacuum valve opening and closing mechanism for opening and closing the vacuum valve according to a variation of the pressure detected by the pressure sensor, an open-state holding mechanism for holding the vacuum valve open until air is drawn in through the suction pipe after sewage is drawn in through a suction pipe, and a pressure transmitting mechanism for transmitting a pressure upstream of the vacuum valve in the suction pipe to the open-state holding mechanism to detect when air is drawn in through the suction pipe.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile