| 发明名称 |
Multistep root pump for pumping plant, has two pairs of rotors which are individually provided in corresponding pump chambers and sequentially rotate in longitudinal direction |
| 摘要 |
Two pairs of rotors (9-12), individually provided in corresponding pump chambers (2a,4a), sequentially rotate in the longitudinal direction along a small space.
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| 申请公布号 |
DE19957024(A1) |
申请公布日期 |
2000.06.29 |
| 申请号 |
DE19991057024 |
申请日期 |
1999.11.26 |
| 申请人 |
KABUSHIKI KAISHA TOYODA JIDOSHOKKI SEISAKUSHO, KARIYA |
发明人 |
UETSUJI, KIYOSHI;GOTO, KUNIFUMI;HOSHINO, NOBUAKI;UCHIYAMA, OSAMU |
| 分类号 |
F04C18/18;F04C23/00;F04C25/02;(IPC1-7):F04C18/18 |
主分类号 |
F04C18/18 |
| 代理机构 |
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代理人 |
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