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:
Jun. 22, 2004
Filed:
Jan. 30, 2003
Applicant:
Inventors:
Assignee:
Toyoda Koki Kabushiki Kaisha, Kariya, JP;
Primary Examiner:
Int. Cl.
CPC ...
F02B 7/532 ;
U.S. Cl.
CPC ...
F02B 7/532 ;
Abstract
A crankpin of a crankshaft rotatably supports a big end of a connecting rod through a sliding bearing fitted therein. The sectional profile of the crankpin takes the form of a polygon whose profile is made of plural arcs of curvature. When the crankpin rotates relative to the bearing , the wedge effect is generated to decrease the squeeze loss, a kind of the power loss. And, the oil film thickness between the crankpin and the bearing is secured to prevent the shear loss, another kind of the power loss, from increasing, whereby the power loss can be decreased in total.