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. 03, 2001
Filed:
Oct. 26, 1999
Yamaha Hatsudoki Kabushiki Kaisha, Iwata, JP;
Abstract
The present invention is a piston for use in an internal combustion engine and a method of manufacturing the piston. In the method of the present invention, a first block comprising a first alloy and a second block comprising a second alloy are press-forged to form a piston. The piston has a head and a skirt, with the head comprising at least a portion of the first alloy and the skirt comprising at least a portion of the second alloy. The first alloy preferably comprises an aluminum-iron based alloy, and the second alloy preferably comprises an aluminum-silicon based alloy. Preferably, during the forging process an interface between the blocks is increased in length or area, whereby oxide layers on the blocks are destroyed and the material comprising the two alloys is bonded directly.