Title:
SCREW COUPLING FOR STEEL PIPE
Document Type and Number:
WIPO Patent Application WO/2014/115191
Kind Code:
A1
Abstract:
In this screw coupling, the outer peripheral surface (31) of the nose section of a pin (3) is caused to have a simple tapered shape, the sealing surface (21) of a box (1) has an outwardly convex curved surface shape, and the seal point (xp) defined by the given formula is at least 0.2 inches.
Inventors:
NAGAHAMA TAKUYA (JP)
SONOBE OSAMU (JP)
YOSHIKAWA MASAKI (JP)
TAKANO JUN (JP)
KAWAI TAKAMASA (JP)
SONOBE OSAMU (JP)
YOSHIKAWA MASAKI (JP)
TAKANO JUN (JP)
KAWAI TAKAMASA (JP)
Application Number:
PCT/JP2013/000436
Publication Date:
July 31, 2014
Filing Date:
January 28, 2013
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
F16L15/04
Domestic Patent References:
| WO2012002409A1 | 2012-01-05 | |||
| WO2012118167A1 | 2012-09-07 |
Foreign References:
| JP2012180858A | 2012-09-20 | |||
| JP2005351324A | 2005-12-22 | |||
| JP4535064B2 | 2010-09-01 |
Other References:
See also references of EP 2949983A4
Attorney, Agent or Firm:
KUMASAKA, Akira et al. (JP)
Akira Kumasaka (JP)
Akira Kumasaka (JP)
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