Patent ID: 6415488
Filing Date: 2002-07-09
Classification: B21D,B25B,F16L,Y10T

Abstract:
An apparatus for producing a tube joint, comprising:a plurality of tightening members each of which has a circular arc-shaped projection protruding toward a center and each of which has a circular arc-shaped divided form; a pressing member which has an inner wall surface with its diameter gradually increasing in an axial direction, for surrounding a conical surface formed on an outer wall of said plurality of tightening members respectively; and a drive unit for displacing said pressing member is said axial direction, wherein: said plurality of tightening members arranged in an annular configuration are displaced toward said center respectively in accordance with a sliding action of said conical surface of said tightening members and said inner wall surface of said pressing member, and said circular arc-shaped projections provided with said tightening members are used to press an outer circumference of a ring member made of metal substantially uniformly toward said center so that said ring member is tightened.