Title:
入れ子式管を継合するための固定装置および方法
Document Type and Number:
Japanese Patent JP4904547
Kind Code:
B2
Abstract:
A locking segment for use in connecting two lengths of pipe has a radically extending heel that serves as a rotational brake. By mating the brake into an annular trough, that is, by placing it between two walls, the rotation of the segment can continue only until points on the brake mure between the two walls. Rotation of the segment in response to increasing thrust pressures can thereby be arrested before the rotation causes the segment to bear on the spigot with a radially inward force great enough to penetrate the spigot.
Inventors:
Holmes William W. Force
Copeland Daniel A.
Copeland Daniel A.
Application Number:
JP2008212027A
Publication Date:
March 28, 2012
Filing Date:
August 20, 2008
Export Citation:
Assignee:
United States Pipe and Foundry Company LLC
International Classes:
F16L37/12; F16L49/00; F16B7/20; F16L21/08; F16L25/00; F16L37/08
Domestic Patent References:
| JP4249690A | ||||
| JP6221478A | ||||
| JP59177890U | ||||
| JP60178692U |
Foreign References:
| US3963298 | ||||
| US5219189 | ||||
| US5645285 | ||||
| US5464228 |
Attorney, Agent or Firm:
Calyx
Miyazaki Yoshio
Tsutomu Kato
Kaoru Onozuka
High Masahiro
Miyazaki Yoshio
Tsutomu Kato
Kaoru Onozuka
High Masahiro