Title:
STRUCTURE
Document Type and Number:
Japanese Patent JP2015094425
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To facilitate screw-in of a copper pipe with a screw at the end part of which a parallel male screw is formed.SOLUTION: A parallel male screw 12 is formed at the end part of a copper pipe 11 by rolling, and a tip part 12a of the parallel male screw 12 is formed into a tapered shape.
Inventors:
YAGI KOJI
SUMIDA NORIKAZU
SUMIDA NORIKAZU
Application Number:
JP2013234050A
Publication Date:
May 18, 2015
Filing Date:
November 12, 2013
Export Citation:
Assignee:
NICHIRIN CO LTD
International Classes:
F16L15/04; B21H3/02
Attorney, Agent or Firm:
Kaji/Suhara Patent Office
Previous Patent: LOCK UP DEVICE OF TORQUE CONVERTER
Next Patent: BASE ISOLATION STAND AND BASE ISOLATION DEVICE USING THE SAME
Next Patent: BASE ISOLATION STAND AND BASE ISOLATION DEVICE USING THE SAME