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:
May. 15, 2012
Filed:
Apr. 01, 2010
Applicant:
Hisashi Kazuta, Shizuoka, JP;
Inventor:
Hisashi Kazuta, Shizuoka, JP;
Assignee:
Yamaha Hatsudoki Kabushiki Kaisha, Shizuoka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B63B 35/73 (2006.01); F01N 13/00 (2010.01);
U.S. Cl.
CPC ...
Abstract
An outboard motor includes an engine, an exhaust passage, an idle exhaust passage, a contraction portion and an expansion chamber, a bypass passage, and a check valve. The bypass passage includes an upstream end connected to the idle exhaust passage at a downstream side relative to the contraction portion and the expansion chamber, and a downstream end connected to the idle exhaust passage at an upstream side relative to the contraction portion and the expansion chamber. The check valve is provided in the bypass passage. The check valve is arranged such that air flows only from the upstream end side to the downstream end side.