FLARE-SHAPED END STRUCTURE FOR TUBE

Title:

FLARE-SHAPED END STRUCTURE FOR TUBE

Document Type and Number:

WIPO Patent Application WO/2005/073608

Kind Code:

A1

Abstract:

To achieve high sealing effect without relying on elastic deformation of a flare section, and at the same time, obtain excellent processability of the flare section. A flare-shaped end structure for a tube, where a conically spreading flare section (24) is formed at an end of a metallic tube (20) and tightening a flare nut (27) causes the flare section (24) to be pressed to a seat surface (25) of a mating member (21). The flare section (24) has a head section (30) coming into contact with the seat surface (25) and a bent section (32) continuous to the head section (30). The bent section (32) has an outer periphery section (31) on the outer side and a valley section (34) on the inner side. The valley section (34) has a valley bottom apex (34a), the apex of the valley section. The flare section (24) is shaped such that the curvature radius (R) is smaller than the thickness (t) of the tube (20).

Inventors:

WADA SHIZUO (JP)

Application Number:

PCT/JP2005/000885

Publication Date:

August 11, 2005

Filing Date:

January 25, 2005

Export Citation:

Click for automatic bibliography generation Help

Assignee:

SANOH IND CO LTD (JP)
WADA SHIZUO (JP)

International Classes:

F16L19/028; F16L19/02; (IPC1-7): F16L19/028

Foreign References:

JP2002286177A	2002-10-03
JP2001141141A	2001-05-25

Other References: