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:
Sep. 07, 2010
Filed:
Sep. 26, 2008
Tatsuya Okui, Amagasaki, JP;
Kouichi Kuroda, Takatsuki, JP;
Masayoshi Akiyama, Kobe, JP;
Sumitomo Metal Industries, Ltd., Osaka, JP;
Abstract
An apparatus for sizing a pipe end comprising: a plugfor sizing the pipe end; a chuckfor clamping the pipe; and shifting means for shifting the position of the plugand/the chuck, which are placed successively from the end of the pipe, and the plughas a circular cross section, and is constituted by a taper portionand a diameter equivalent portioncontinuously formed from the tip of the plug in succession. The outer diameter of the taper portionis gradually expanding from the tip toward the rear end while satisfying the following formulas (1) and (2). The chuckis capable of changing clamping position of the pipe. This apparatus makes it possible to size the inner diameter of a pipe end with superior dimensional precision/()≦  (1)RR  (2).