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. 28, 1992
Filed:
Sep. 11, 1990
Nissan Motor Company, Ltd., , JP;
Abstract
A piston for an internal combustion engine comprises a skirt portion formed with a piston pin hole. The skirt portion includes in an axial direction of the piston a first portion upper than an axis of the piston pin hole, and a second portion lower than the axis thereof. The first portion has a first cross section formed in accordance with a first ellipse, and the second portion has a second cross section formed in accordance with a second ellipse. The first and second ellipses have two foci, respectively, on a center plane of the piston which is perpendicular to the axis of the piston pin hole. The first ellipse is smaller in ellipticity than the second ellipse. The skirt portion including a ramp portion connecting the first portion to the second portion.