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. 06, 2000
Filed:
Feb. 12, 1998
Yamaha Hatsudoki Kabushiki Kaisha, Iwata, JP;
Abstract
A method of forming a piston for a reciprocating machine such as an engine. The piston is formed from a powdered material that is comprised of aluminum alloyed with a material selected from the group of silicon (Si) and iron (Fe) having a particle diameter not greater than 10 .mu.m. The resulting alloy is then forged into a piston having a piston head and a piston skirt. The powder which is solidified and forged is formed by a process comprising the steps of forming an ingot from an alloy comprised of aluminum and an alloying material. This ingot is then melted and dispersed as a liquid in a chilling stream to form powdered metal particles. These powdered metal particles are then compressed into a blank having a cylindrical configuration for subsequent forging.