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:
Apr. 10, 2007
Filed:
Sep. 23, 2005
Yosuke Hoi, Saitama, JP;
Yosuke Hoi, Saitama, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
An internal combustion engine is provided for a personal watercraft in which a portion of the engine that is enlarged to accommodate a balance shaft is minimized in size, whereby the internal combustion engine is made compact. Balance shafts for preventing secondary vibration are arranged together with a crankshaft on a dividing plane between a crankcase and a cylinder block of an internal combustion engine. The balance shafts lie mutually in parallel with the crankshaft. A crankshaft bearing is formed in the dividing plane on each of plural mutually opposed, longitudinally spaced rib pairs, and balance shaft bearing is formed in the dividing plane on a selected rib pair of the plural rib pairs. The balance shaft bearing is positioned so as to be biased in a direction in which the balance shaft bearing is closer to an adjacent rib compared with the crankshaft bearing.