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:
Nov. 03, 1981
Filed:
Jun. 29, 1979
Masaru Masaki, Aichi, JP;
Yoshinori Ito, Toyota, JP;
Akihiko Inoue, Toyota, JP;
Munetaka Toda, Kariya, JP;
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JP;
Abstract
A process and a device for expanding or contracting the end of a pipe are disclosed. First an ironing die or punch is put over or into the end of the pipe. Then the end of the pipe is expanded or contracted by a rod form expanding punch or a tube form reducing die. Then, with this punch or die still in place, the ironing die or punch is pulled over or through the end of the pipe, so as to pinch the wall of the pipe between itself and the punch or die, and thereby the wall of the pipe is ironed so as to release any strains that may have been caused in it by the expanding or contracting process. Thereby more accurate pipe ends can be formed simply and reliably.