| 发明名称 |
SCREW ROTOR FOR VACUUM PUMPS |
| 摘要 |
The moment (Mo) of an unbalanced force (Fr) of a screw rotor A1 is reduced by adjusting the number of leads of a threaded portion (2) of the screw rotor A1 to the sum of an integer and 0.5. The amount of unbalance for keeping a state of dynamic balance thereby decreases, and the drilling of a thread <u>e</u> for keeping a state of dynamic balance is made easier.
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| 申请公布号 |
WO9949217(A1) |
申请公布日期 |
1999.09.30 |
| 申请号 |
WO1998JP01982 |
申请日期 |
1998.04.30 |
| 申请人 |
TAIKO KIKAI INDUSTRIES CO., LTD.;MITO, MASARU |
发明人 |
MITO, MASARU |
| 分类号 |
F04C18/08;F04C18/16;F04C25/02;F04C29/00;(IPC1-7):F04C18/16 |
主分类号 |
F04C18/08 |
| 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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