发明名称 PERFEZIONAMENTO NEI GIUNTI A MANICOTTO SENZA FILETTATURA PER COLLEGARE TUBI METALLICI
摘要 A joint is formed at adjacent ends of tubes (5, 7) by inserting the ends of the tubes into opposite ends of sleeve (1) until the tube ends engage centrally positioned inwardly extending protrusion (3). The sleeve (1) is crimped inwardly into frictional engagement with the tubes (5, 7), only at the middle portion and at the end portions of the sleeve to partially deform the sleeve and the tubes at the adjacent ends of the tubes and at positions of the tubes displaced from the tube ends.
申请公布号 IT1148382(B) 申请公布日期 1986.12.03
申请号 IT19820048871 申请日期 1982.07.22
申请人 DAIWA STEEL TUBE INDUSTRIES CO LTD 发明人 MATSUICHI NAKAMURA
分类号 C21C5/46;B21D39/04;F16L13/14;(IPC1-7):F16L/ 主分类号 C21C5/46
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