FLARELESS PIPE COUPLING STRUCTURE, FLARELESS PIPE COUPLING METHOD, AND ON-SITE PIPE COUPLING METHOD

Title:

FLARELESS PIPE COUPLING STRUCTURE, FLARELESS PIPE COUPLING METHOD, AND ON-SITE PIPE COUPLING METHOD

Document Type and Number:

WIPO Patent Application WO/2007/114360

Kind Code:

A1

Abstract:

A guide taper surface (17) of a flareless pipe coupling structure of a pipe coupling port (16) comprises a small-diameter part (17a) guiding the end part (3a) of a flareless sleeve (3) so as to be bitten into a coupled pipe (5) and a large-diameter part (17b) fitted to the tapered outer peripheral surface (33) of the flareless sleeve (3) for sealing. The tilt angle α1 of the small-diameter part (17a) to the center axis of the guide taper surface (17) is larger than the tilt angle α2 of the large-diameter part (17b) to the center axis. Consequently, even when the end part of the coupled pipe (5) is not inserted into the deepest position of the pipe coupling port (16), excellent seal performance can be provided to the structure at the portion of the bite type sleeve connected to the connection pipe.

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Inventors:

NAKATA HARUO (JP)
SHIMAMURA TAKASHI (JP)

Application Number:

PCT/JP2007/057178

Publication Date:

October 11, 2007

Filing Date:

March 30, 2007

Export Citation:

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Assignee:

DAIKIN IND LTD (JP)
NAKATA HARUO (JP)
SHIMAMURA TAKASHI (JP)

International Classes:

F16L19/08

Foreign References:

JPS52123321U	1977-09-20
JP2001141169A	2001-05-25
JP2005246967A	2005-09-15
JP2005257127A	2005-09-22
JP2003074768A	2003-03-12
JP2005036947A	2005-02-10
US4556242A	1985-12-03

Other References: