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:
Oct. 28, 2003
Filed:
Feb. 28, 2002
Naoki Kinomoto, Shizuoka, JP;
Yamaha Marine Kabushiki Kaisha, Shizuoka-ken, JP;
Abstract
A small watercraft engine having a lubrication system including a lubrication oil reservoir defining a cooling water jacket therein. A cooling system of the engine supplies cooling water to the water jacket. The water jacket includes at least one rib, and preferably a plurality of ribs, to guide the cooling water within the water jacket. The ribs may be arranged to guide cooling water from a lower portion of the water jacket to an upper portion of the water jacket through two or more generally distinct horizontal regions. Preferably, a pair of baffle arrangements are disposed within the oil reservoir. A first baffle arrangement separates the interior space of the reservoir from a breather chamber which communicates with the intake system. A second baffle arrangement is configured to generally retain oil within a lower portion of the reservoir so as to be available to a delivery port, which delivers oil to an oil pump of the engine. The delivery port desirably tapers in diameter from an upper end to a lower end to supply an ample amount of oil to the oil pump when the watercraft is leaning.