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:
Mar. 10, 1998

Filed:

Dec. 07, 1995
Applicant:
Inventors:

Toshio Yamagiwa, Saitama, JP;

Hiroki Makino, Saitama, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21K / ;
U.S. Cl.
CPC ...
72370 ; 72356 ;
Abstract

The present invention provides a pivot pipe for a rear fork of a motorcycle, capable of being formed at comparatively low cost by a simple process. The pivot pipe has a lightweight, strong construction and does not vary widely in quality from one pivot pipe to another. The pivot pipe is connected to a right swing arm and a left swing arm and includes a first end supported on a needle bearing mounted on a pivot shaft and a second end having an inside diameter greater than that of the first end supported on a ball bearing mounted on the pivot shaft. The pivot pipe is formed by expanding one end of a single pipe by press working.


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