Title:
FLARE FITTING STRUCTURE AND FLARED TUBING MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2021/095772
Kind Code:
A1
Abstract:
Provided is a flare fitting structure that is capable of preventing surface unevenness in a flared sloped face of flared tubing, and ensuring high seal surface pressure. In a flare fitting structure (1) in which a flared part (12) that is formed on an end of flared tubing (10) and abuts a member (2) to be joined thereto is compressed by a flare nut (3) to join the flared tubing (10) to the member (2) to be joined thereto, the flared tubing (10) is formed by flaring circular tubing (40) constituted by a tubing blank (41) and a coating layer (42) coating the surface of the tubing blank (41), the flared part (12) comprises a flared sloped face (13) facing the member (2) to be joined thereto, and the flared sloped face (13) is formed by a mechanically machined part (43) in which the tubing blank (41) has been exposed through mechanical machining.
Inventors:
SEINO IICHIRO (JP)
Application Number:
PCT/JP2020/042088
Publication Date:
May 20, 2021
Filing Date:
November 11, 2020
Export Citation:
Assignee:
USUI CO LTD (JP)
International Classes:
F16L13/14; B21D39/04; B21D51/16; F16L19/04
Foreign References:
| JP2014059051A | 2014-04-03 | |||
| JP2000161567A | 2000-06-16 | |||
| DE102015105798A1 | 2016-07-28 | |||
| JPH09502009A | 1997-02-25 | |||
| JPS5737179A | 1982-03-01 | |||
| JPH11218269A | 1999-08-10 | |||
| JP2018532084A | 2018-11-01 | |||
| JP2008190580A | 2008-08-21 |
Other References:
See also references of EP 4060213A4
Attorney, Agent or Firm:
CREO LAW & INTELLECTUAL PROPERTY (JP)
Download PDF: