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.
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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 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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