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. 15, 2016
Filed:
Mar. 09, 2011
Mitsuo Kawamura, Kuwana, JP;
Eiichiro Shimazu, Kuwana, JP;
Yasutake Hayakawa, Kuwana, JP;
Takahiro Okuno, Kuwana, JP;
Junichi Ooshimo, Hiroshima, JP;
Ryuichi Sakamoto, Hiroshima, JP;
Mitsuo Kawamura, Kuwana, JP;
Eiichiro Shimazu, Kuwana, JP;
Yasutake Hayakawa, Kuwana, JP;
Takahiro Okuno, Kuwana, JP;
Junichi Ooshimo, Hiroshima, JP;
Ryuichi Sakamoto, Hiroshima, JP;
NTN Corporation, Osaka, JP;
Abstract
A cage is made of a magnesium alloy such as AZ91D, and is molded by means of injection molding. In this cage, a confluence region is brought away to outside the cage during the injection molding. The confluence region is a region including a void formed by merging of flows of the magnesium alloy. When observing a cross sectional surface of the cage, a ratio of an α phase having a grain size of 20 μm or greater is less than 15% in the magnesium alloy constituting the cage.