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:
Nov. 27, 2007
Filed:
Jun. 21, 2005
Applicants:
Hiroshi Mizuguchi, Saitama, JP;
Hiromi Ura, Saitama, JP;
Hiroshi Takahashi, Saitama, JP;
Koji Kasai, Saitama, JP;
Inventors:
Hiroshi Mizuguchi, Saitama, JP;
Hiromi Ura, Saitama, JP;
Hiroshi Takahashi, Saitama, JP;
Koji Kasai, Saitama, JP;
Assignee:
Honda Motor Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B63H 1/15 (2006.01);
U.S. Cl.
CPC ...
Abstract
In an outboard motor, an extension case (member constituting a frame of the outboard motor) has the natural frequency (resonance frequency) of higher than the vibration frequency produced when the engine operates at maximum speed. Since this configuration prevents the extension case from resonating during operation of the outboard motor, noise (more specifically, noise produced by the outboard motor) propagated to the outside can be reduced.