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:
Nov. 12, 2002
Filed:
Aug. 14, 2001
Franz Laimböck, Thal, AT;
AVL List GmbH, Graz, AT;
Abstract
The invention relates to a piston for a four-stroke internal combustion engine, comprising a piston head with a piston top on the side of the combustion space, and a first groove next to the piston top holding a compression ring and a second groove further apart from the piston top holding an oil scraper ring being formed in the wall of the piston head , and a piston ring land being formed between the two grooves , and further comprising a piston skirt adjacent to the piston head , whose wall includes first guide faces for guiding the piston in a cylinder, as well as a piston pin bore carrying a piston pin . To reduce oil consumption and diminish frictional losses, it is provided that the ring land between the two grooves be designed as second guide face for guiding the piston