PIPE FITTING

WIPO Patent Application WO/2021/010293

A1

The present invention relates to a pipe fitting to which a pipe body is connected, and which can be used repeatedly without leakage and without the pipe body coming out. This pipe fitting is provided with a fitting main body having a hollow portion into which a pipe body can be inserted, a gripper inside the fitting main body for gripping the outer circumference of the pipe body, and a sealing ring for filling a gap between the hollow portion and the pipe body, wherein: the gripper is provided with an annular portion, and a plurality of claw portions which extend inward from the annular portion, obliquely in the pipe body insertion direction; if α1 (degrees) is the angle between the claw portions and the outer circumferential surface of the pipe body when the pipe body has been inserted into the hollow portion, α1 is greater than 40 and at most equal to 70; if α2 is the angle between the claw portions and the outer circumferential surface of the pipe body when a 50 N pulling-out stress is applied to the pipe body, the relational expression -2≤α2-α1<35 is satisfied; and in a state in which the pipe body has been inserted into the hollow portion, the claw portions bite into the pipe body by an amount that is at least equal to 3% and less than 35% of the thickness of the pipe body.

YODA KEIJI (JP)
TAKANEZAWA DAIMATSU (JP)

PCT/JP2020/026915

January 21, 2021

July 09, 2020

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JUNKOSHA INC (JP)

F16L21/08; F16L37/091

WO2014197481A2

2014-12-11

JP2004232720A	2004-08-19
US5695224A	1997-12-09
JPH06300175A	1994-10-28
JPS622883U	1987-01-09
US20100045032A1	2010-02-25
US20150159794A1	2015-06-11

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