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:
Jun. 02, 2015
Filed:
Jan. 02, 2013
Applicant:
Neturen Co., Ltd., Tokyo, JP;
Inventor:
Takashi Yamawaki, Komaki, JP;
Assignee:
NETUREN CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H 19/04 (2006.01); B21K 1/76 (2006.01); F16H 55/26 (2006.01); B21D 51/12 (2006.01);
U.S. Cl.
CPC ...
F16H 19/04 (2013.01); F16H 55/26 (2013.01); B21D 51/12 (2013.01); B21K 1/767 (2013.01); B21K 1/768 (2013.01);
Abstract
The present invention includes a bar having a maximum cross section region smaller than a minimum cross section region of a hollow portion of a pipe P, and projected portions mounted along an axial direction of the bar and including a projected portion with maximum extent Hb, extent Ha of the projected portion positioned at a leading end side of the bar is set to be smaller than extent Hb of the projected portion positioned at a center side in the axial direction, and extent Hc of the projected portion positioned at a base end side of the bar is set to be less than or equal to extent Hb of the projected portion.