发明名称 Method of forming a pipe fitting
摘要 A method of forming a pipe fitting of unitary construction having a tubular section with a radial flange at one end of the tubular construction. The method includes forming a solid cylindrical bar, upsetting one end of the bar to form a head thereon, drawing the remaining cylindrical portion of the bar to increase its length and decrease its circumference, upsetting the head to form the radial flange, and forming a bore through the flange and remaining cylindrical portion of the bar.
申请公布号 US4768369(A) 申请公布日期 1988.09.06
申请号 US19870121331 申请日期 1987.11.13
申请人 JOHNSON, RUSSELL H.;BOBZIEN, LARRY L. 发明人 JOHNSON, RUSSELL H.;BOBZIEN, LARRY L.
分类号 B21C37/28;B21K1/14;(IPC1-7):B21C37/29;B21D7/00 主分类号 B21C37/28
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