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:
Feb. 06, 2007
Filed:
Mar. 22, 2005
Takayoshi Muramatsu, Shizuoka, JP;
Takayoshi Muramatsu, Shizuoka, JP;
Yamaha Hatsudoki Kabushiki Kaisha, Shizuoka-Ken, JP;
Abstract
A dry sump type lubrication device for a motorcycle includes a four stroke engine having, in a crankcase bottom, a first oil pump for collecting lubricating oil and a second oil pump for delivering lubricating oil. A frame supporting the four-stroke engine and having left and right down tubes running around the crankcase from the crankcase front thereof toward a region therebelow is provided. An oil tank is disposed in a region surrounded by a forward end of the crankcase and the left and right down tubes, a return passage for the lubricating oil collected by the first oil pump to be returned to the oil tank. A feed passage for the lubricating oil returned to the oil tank to be introduced into the second oil pump and an overflow passage for the lubricating oil in the oil tank to be returned to the four-stroke engine are also provided.