PIPE JOINT STRUCTURE - INOUE SUDARE CO LTD

Title:

PIPE JOINT STRUCTURE

Document Type and Number:

WIPO Patent Application WO/2014/045632

Kind Code:

A1

Abstract:

Provided is a pipe joint structure which is configured so that, when a pipe consists of aluminum, the pipe joint structure enables quick and firm connection of the pipe without providing a flare to an end of the pipe. A pipe joint structure comprises a joint body (1) equipped with a male thread and also comprises a cap nut (3) which is engaged with the male thread (2) of the joint body (1), and the pipe joint structure is used for the connection of an aluminum pipe (4). The pipe joint structure has a sleeve (7) for compression and deformation. The sleeve (7) is received in the inner receiving space (10) of the cap nut (3) and has a peripheral groove (9) in the outer peripheral surface (8) thereof. The sleeve (7) receives axial compression force from both the joint body (1) and the cap nut (3) when connecting the cap nut (3) and the male thread (2) of the joint body (1) by threads. As a result, a thin-walled section (13) at the bottom of the peripheral groove is plastically deformed radially inward, bites into the inserted aluminum pipe (4) from the outer peripheral surface (14) side thereof, and retains the aluminum pipe (4).

Inventors:

INOUE HIROSHI (JP)

Application Number:

PCT/JP2013/063279

Publication Date:

March 27, 2014

Filing Date:

May 13, 2013

Export Citation:

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Assignee:

INOUE SUDARE CO LTD (JP)
HIGASHIO MECH CO LTD (JP)

International Classes:

F16L19/08

Foreign References:

JPH10185027A	1998-07-14
JP2002327876A	2002-11-15
JP2006329436A	2006-12-07
JP2002340250A	2002-11-27
JP2005042858A	2005-02-17

Other References: