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.

Date of Patent:
Feb. 27, 2007

Filed:

Mar. 30, 2006
Applicants:

Yoshiaki Noda, Saitama, JP;

Masatsugu Matsumoto, Saitama, JP;

Inventors:

Yoshiaki Noda, Saitama, JP;

Masatsugu Matsumoto, Saitama, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B63B 35/73 (2006.01);
U.S. Cl.
CPC ...
Abstract

An open/close valve can decrease the exhaust resistance as much as possible in a usual operation. An open/close valve includes a valve casing and a valve element that is housed in the valve casing in a vertically movable manner. The valve casing includes a cylindrical portion that extends vertically. A through hole is formed in the cylindrical portion. A bottom portion is formed on a bottom of the cylindrical portion. A discharge inlet is formed in an upper portion of the cylindrical portion. The valve element includes a cylindrical body that is arranged along an inner surface of the cylindrical portion and has a height that maintains an opening of the through hole and a seal plate that covers an upper portion of the cylindrical body and has a size capable of closing the exhaust inlet.


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