Title:
PIPE JOINT
Document Type and Number:
WIPO Patent Application WO/2024/005046
Kind Code:
A1
Abstract:
A pipe joint 1 comprises: a spigot end 3 formed on a first pipe 2; a socket 5 formed on a second pipe 4; a lock ring groove 7 formed on an inner circumference of the socket 5; a lock ring 8 accommodated in the lock ring accommodation groove 7; and a spigot end engagement portion 10 formed on an outer circumference of the spigot end 3. The spigot end engagement portion 10 is caught on the lock ring 8 in a state in which the spigot end 3 is inserted in the socket 5, thereby preventing the spigot end 3 from coming off from the socket 5. The socket 5 has, on the inner circumference, an inner tapered surface 30 expanding radially from an inner end of the socket 5 toward an opening end of the socket 5, and a bending angle limiting portion 34 projecting inward in a pipe radial direction from the inner circumference of the socket 5. The inner tapered surface 30 is formed between the lock ring accommodation groove 7 and an inner end portion 26 of the socket 5. The bending angle limiting portion 34 prevents the first pipe 2 from bending with respect to the second pipe 4 beyond an allowable angle.
Inventors:
KOMARU YUITO (JP)
TANAKA RYUNOSUKE (JP)
ODA KEITA (JP)
TANAKA RYUNOSUKE (JP)
ODA KEITA (JP)
Application Number:
PCT/JP2023/023906
Publication Date:
January 04, 2024
Filing Date:
June 28, 2023
Export Citation:
Assignee:
KUBOTA KK (JP)
International Classes:
F16L21/04; F16L21/08
Foreign References:
| JPH09159080A | 1997-06-17 | |||
| JPS57165883U | 1982-10-19 | |||
| JP2015140808A | 2015-08-03 | |||
| JPS60157585A | 1985-08-17 | |||
| JP2021067283A | 2021-04-30 |
Attorney, Agent or Firm:
MORIMOTO PATENT ATTORNEYS (JP)
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