logo

For the Inventor, By the Inventor

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.:

US 4992111 B1

PDFFull Text
Date of Patent:
Feb. 12, 1991

Filed:

Aug. 08, 1989

Bearing race member and method of fabrication

Applicant:
Inventors:

Hiroshi Yamada, Mie, JP;

Hirokazu Nakajima, Gifu, JP;

Noriyuki Tsushima, Mie, JP;

Hirotsugu Hamaoka, Hyogo, JP;

Assignee:

N.T.N. Corporation, Osaka, JP;

Attorney:

Morrison Law Firm

Primary Examiner:

Deborah Yee

Int. Cl.
CPC ...
C22C / ; C22C / ; C21D / ;
U.S. Cl.
CPC ...
148 124 ; 148320 ; 148333 ; 148906 ; 148143 ; 384492 ; 384912 ;
Abstract

A bearing race member composed of steel containing 0.60 to 0.85% carbon by weight, 0.5 to 1.0% by weight in a single content or total contents of Si and Al, and 13 ppm or less oxygen, wherein said bearing race member is quenched and subsequently tempered to contain 15% or less retained austenite therein. Even though basically made of structural carbon steel, the bearing race member has a long life equal to that of high-carbon chromium bearing steel and is superior in dimensional stability and crack fatigue strength.

Find Patent Forward Citations

Yamada, Hiroshi. (1991). Bearing race member and method of fabrication (U.S. Patent No. 4992111). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4992111

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Loading…