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:
Dec. 26, 2017
Filed:
Dec. 09, 2011
Hiromi Watanabe, Kanagawa, JP;
Hiroshi Komatsu, Chiba, JP;
Shigeki Nishimura, Saitama, JP;
Shigeru Tsukada, Saitama, JP;
Hiromi Watanabe, Kanagawa, JP;
Hiroshi Komatsu, Chiba, JP;
Shigeki Nishimura, Saitama, JP;
Shigeru Tsukada, Saitama, JP;
NIPPON KOEI CO., LTD, Tokyo, JP;
TOKYO METROPOLITAN SEWERAGE SERVICE CORPORATION, Tokyo, JP;
TOKYO METROPOLITAN GOVERNMENT, Tokyo, JP;
Abstract
A control plate is provided at a preferred position in a storm overflow chamber. An inflow pipe, an intercepting pipe, and an outflow pipe are connected to the storm overflow chamber. A vortex flow type water surface control device for a draining device includes the overflow chamber, and a control plate arranged in front of an opening portion of the intercepting pipe opening to the storm overflow chamber. A relation (1) 0.5 D≦X≦0.7 D and 0.83 D≦Y≦1.5 D holds true, or a relation (2) 0.4 D≦X≦0.5 D and 1.0 D≦Y≦1.5 D holds true, where D represents an inner diameter of the opening portion, X represents a projection length of the control plate with respect to the opening portion, and Y represents a distance between the control plate and the opening portion. As a result, contaminants enter the intercepting pipe.