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:
May. 25, 1976
Filed:
Dec. 13, 1974
Applicant:
Inventors:
Shigetsune Aoyama, Okazaki, JA;
Masahiko Kato, Aichi, JA;
Motoo Matsubara, Kasugai, JA;
Osamu Furuta, Tokai, JA;
Assignees:
Kabushiki Kaisha Toyota Chuo Kenkyusho, BOTH OF, JA;
Aichi Steel Works, Ltd., BOTH OF, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B26F / ;
U.S. Cl.
CPC ...
225-2 ; 148-96 ; 225 935 ; 225 96 ; 225 965 ; 225102 ;
Abstract
A method for breaking a steel rod into billets for forging, rolling, etc., by cutting a circumferential notch in the surface of the steel rod, locally heating the surface areas of the rod adjacent the notch so that the temperature at the notch bottom is less than a transformation temperature of the steel of the rod, quenching the rod thereby to develop a crack extending from the notch bottom toward the center of the rod, and applying a mechanical load to break the rod along its notched portion.