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:
May. 24, 2005
Filed:
Oct. 15, 2003
Hiromi Takasaki, Tokyo, JP;
Yoshikazu Takamatsu, Toyko, JP;
Nobuo Ichimura, Toyko, JP;
Susumu Sato, Tochigi, JP;
Hiromi Takasaki, Tokyo, JP;
Yoshikazu Takamatsu, Toyko, JP;
Nobuo Ichimura, Toyko, JP;
Susumu Sato, Tochigi, JP;
Calsonic Kansei Corporation, Tokyo, JP;
Abstract
A duplex pipe () is cut with a cutting tool (), for cutting connecting ribs () from the end face of the duplex pipe () which is held with an outer pipe () chucked (rib cutting step). The duplex pipe () is cut from the end face of the duplex pipe () up to the portion thereof corresponding to the exposed length of the inner pipe () to thereby form a slit () in the outer pipe () and connecting ribs () (slit forming step). The cutting tool () has a guide hole () into which the inner pipe () can be inserted while guiding the inner pipe outer peripheral surface (), a cutting device () for cutting the connecting ribs (), and a guide pin () which can be inserted into the inner pipe () while guiding the inner pipe inner peripheral surface ().