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:
Mar. 17, 2009
Filed:
Mar. 31, 2004
Koki Otsuka, Tochigi-ken, JP;
Seiichi Endo, Tochigi-ken, JP;
Takashi Hattori, Niigata-ken, JP;
Masanori Hara, Tochigi-ken, JP;
Susumu Katsuragi, Fukuoka-ken, JP;
Koki Otsuka, Tochigi-ken, JP;
Seiichi Endo, Tochigi-ken, JP;
Takashi Hattori, Niigata-ken, JP;
Masanori Hara, Tochigi-ken, JP;
Susumu Katsuragi, Fukuoka-ken, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Hino Motors Ltd., Tokyo, JP;
Abstract
An integrally cast steel piston for internal engines, the cast steel having (a) a composition comprising 0.8% or less of C, 3% or less of Si, 3% or less of Mn,0.2% or less of S, 3% or less of Ni, 6% or less of Cr, 6% or less of Cu, and 0.01-3% of Nb, the balance being substantially Fe and inevitable impurities, or (b) a composition comprising 0.1-0.8% of C, 3% or less of Si, 3% or less of Mn, 0.2% or less of S, 10% or less of Ni, 30% or less of Cr, 6 % or less of Cu, and 0.05-8% of Nb, the balance being substantially Fe and inevitable impurities, by mass.