Title:
STEEL PIPE AND JOINT CONNECTION MECHANISM
Document Type and Number:
WIPO Patent Application WO/2024/004694
Kind Code:
A1
Abstract:
[Problem] To provide a steel pipe and joint connection mechanism in which a nut that connects a steel pipe to a joint by tightening is unlikely to come loose. [Solution] A hook part 22a is provided on a joint 2, and a ratchet tooth 34 is formed on an annular side surface 33 of an annular outer cylindrical part 31 of a nut 3, the annular side surface 33 facing the joint. The ratchet tooth is a tooth having a ridge at a predetermined height from the annular side surface on which a gentle slope with a gentle downward slope angle in a relative tightening rotation direction of the nut, and a steep upward slope with a steep angle in a relative loosening rotation direction of the nut are formed. One end side of an elastic ring 5 having a notch in a portion of the ring fitted externally on a connection cylindrical part 21 of the joint is locked with the hook part, and the other end side abuts against the steep slope of the ratchet tooth on the annular side surface, thereby preventing relative loosening between the nut and the joint.
More Like This:
| WO/2000/046538 | TUBE JOINT |
| WO/1996/033362 | FORMING A CONNECTION TO AN OBJECT |
| WO/2012/142862 | CONNECTION METHOD FOR THIN WALL METAL PIPE AND PIPE JOINT |
Inventors:
YAMASHIMA MAMORU (JP)
Application Number:
PCT/JP2023/022314
Publication Date:
January 04, 2024
Filing Date:
June 15, 2023
Export Citation:
Assignee:
O N IND CO LTD (JP)
International Classes:
F16L19/028; F16B37/00; F16B39/282
Domestic Patent References:
| WO2009050823A1 | 2009-04-23 |
Foreign References:
| JP2016142293A | 2016-08-08 | |||
| JP2012102783A | 2012-05-31 | |||
| JPS4828601Y1 | 1973-08-29 | |||
| JPS6224807Y2 | 1987-06-25 | |||
| JP2008025615A | 2008-02-07 | |||
| JP2020133890A | 2020-08-31 | |||
| CN114183454A | 2022-03-15 | |||
| CN114278660A | 2022-04-05 | |||
| JPS4352434B1 |
Attorney, Agent or Firm:
WATANABE Mitsuhiko (JP)
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