| 发明名称 |
Method for fabricating a support for a bubble cap on the end of its riser tube |
| 摘要 |
A spider is formed at the upper end of a vapor riser tube by shearing and upsetting or crimping a portion of the upper end to form a support for a bolt which mounts the bubble cap.
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| 申请公布号 |
US4539164(A) |
申请公布日期 |
1985.09.03 |
| 申请号 |
US19840598128 |
申请日期 |
1984.04.09 |
| 申请人 |
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发明人 |
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| 分类号 |
B01F3/04;B01F15/00;B21D41/04;(IPC1-7):B01F3/04 |
主分类号 |
B01F3/04 |
| 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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