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.

Date of Patent:
Nov. 06, 2012

Filed:

Nov. 20, 2007
Applicant:

Yoshinari Hashimoto, Utsunomiya, JP;

Inventor:

Yoshinari Hashimoto, Utsunomiya, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23P 19/04 (2006.01); B26F 3/00 (2006.01); B65H 35/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A set of bolt holes through which bolts are inserted are formed in left and right sides of a large end section. The bolt holes are substantially parallel to the axis of a rod section and are located such that the centers of the bolt holes are each displaced from the center of a cut surface. When a first mandrel and a second mandrel are press fitted to a joint hole of the large end section and are cut and split, the area of contact of the second mandrel on the movable stage side with the inner wall of the joint hole is set greater than the area of contact of the first mandrel on the fixed stage side with the inner wall of the joint hole.


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