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. 30, 2021
Filed:
Apr. 16, 2018
Applicant:
Mazda Motor Corporation, Hiroshima, JP;
Inventors:
Yoshihiro Kawasaki, Hiroshima, JP;
Noboru Shimizu, Hiroshima, JP;
Ryotaro Hirata, Higashihiroshima, JP;
Assignee:
MAZDA MOTOR CORPORATION, Hiroshima, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21J 15/02 (2006.01); B21J 15/36 (2006.01); F16B 5/04 (2006.01); F16B 19/08 (2006.01); B21D 39/03 (2006.01); B29C 65/00 (2006.01);
U.S. Cl.
CPC ...
B21J 15/025 (2013.01); B21J 15/36 (2013.01); B21D 39/031 (2013.01); B29C 66/8322 (2013.01); F16B 5/04 (2013.01); F16B 19/086 (2013.01);
Abstract
A cavity () provided for a die body () at one side thereof in an axial direction includes a cavity bottom surface (), on which a protrusion () jutting toward the one side in the axial direction is formed. A tip end face () of the protrusion () is configured as a flat surface extending in a direction substantially orthogonal to the axial direction and having a predetermined width (W) in a radial direction. The predetermined width (W) of the tip end face () is set to be 10% or more of a diameter (Di) of the cavity () at an open end thereof.