Title:
ネジ保護用プロテクタ
Document Type and Number:
Japanese Patent JP4438500
Kind Code:
B2
Abstract:
In a protector for protecting a trapezoidal female thread of a pipe formed to an end thereof, the protector has a male thread formed thereto so as to be threaded with the female thread as well as the height of the thread of the male thread is made larger than the height of the thread of the female thread. With this arrangement, a surface treatment applied to the surface of the female thread or a male thread formed to the end of the pipe can be prevented from being damaged, and in particular, a surface treatment applied to a guide flank surface, a load flank surface, a corner portion, and the like of the thread can be prevented from being subjected to wear, damage, and the like.
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Inventors:
Ryuichi Imai
Application Number:
JP2004132096A
Publication Date:
March 24, 2010
Filing Date:
April 27, 2004
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
E21B17/08; F16L57/00; B65D59/06; F16B37/14; F16L25/00; F16L35/00; F16L55/11; F16L55/115
Domestic Patent References:
| JP2001199469A | ||||
| JP60099865A |
Foreign References:
| US1776528 |
Attorney, Agent or Firm:
Tetsuro Hoshino
Akihiko Yamashita
Kishimoto Tatsuto
Akihiko Yamashita
Kishimoto Tatsuto