Title:
PIPE JOINT STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2021/177177
Kind Code:
A1
Abstract:
To provide a pipe joint structure that has an excellent sealing property, has a great pull-out resistance, is compatible with a large temperature variation of a sealed fluid, and has a long service life, a joint main body 40 and union nuts 15, 15 are provided and two coupling pipes P, P to be mutually coupled are formed with a tip enlarged tubular section 5 extending over a predetermined axial dimension from the tip end surfaces thereof. A closed annular ring 25 is fitted onto the tip enlarged tubular section 5 past the tapered and stepped section 10 of a pipe P to apply a drawing force so that the tip enlarged tubular section 5 contacts and presses a coupling tubular section 41 formed in a protruding manner on an end of the joint main body 40 so as to be connected.
Inventors:
INOUE HIROSHI (JP)
Application Number:
PCT/JP2021/007407
Publication Date:
September 10, 2021
Filing Date:
February 26, 2021
Export Citation:
Assignee:
HIGASHIO MECH CO LTD (JP)
International Classes:
F16L19/025; F16L19/04; F16L19/10
Domestic Patent References:
| WO2001071234A1 | 2001-09-27 |
Foreign References:
| JPS61109978U | 1986-07-11 | |||
| JP2001248768A | 2001-09-14 | |||
| JP2001182875A | 2001-07-06 | |||
| JPS57145885U | 1982-09-13 |
Attorney, Agent or Firm:
NAKATANI, Takeshi (JP)
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