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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 6328829 B1

PDFFull Text
Date of Patent:
Dec. 11, 2001

Filed:

Oct. 04, 1999

Constrained hardening method and apparatus for deformed bar workpieces

Applicant:
Inventors:

Junichi Kato, Hiratsuka, JP;

Yoshiki Seto, Hiratsuka, JP;

Tetsukazu Fukuhara, Hiratsuka, JP;

Yugo Yao, Hiratsuka, JP;

Assignee:

Neturen Co., Ltd., Tokyo, JP;

Attorney:

Wenderoth, Lind & Ponack, L.L.P.

Primary Examiner:

Roy King

Assistant Examiner:

Harry D Wilkins, Iii

Int. Cl.
CPC ...
C21D 1/673 ;
U.S. Cl.
CPC ...
C21D 1/673 ;
Abstract

Hardening is accomplished by heating a longitudinal section of a workpiece such as an odd-shaped bar, and by quenching while constraining the workpiece section in dies. The quenching is executed while the workpiece is pressed in a direction perpendicular to its longitudinal direction by a pressing device which is installed adjacent to the workpiece section constrained in the dies. Warping by quenching can thus be minimized in odd-shaped workpieces, such as an automobile steering rack bar.

Find Patent Forward Citations

Kato, Junichi. (2001). Constrained hardening method and apparatus for deformed bar workpieces (U.S. Patent No. 6328829). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6328829

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