发明名称 |
Two stage dry primary pump |
摘要 |
A two stage dry primary pump comprises, in a single common stator: a screw pump at its low pressure end; and a fluid viscous effect, single rotary screw gas exhaust pump at its high pressure end; with a link duct providing communication between the screw pump and the viscous effect, single rotary screw gas exhaust pump. The invention is applicable to vacuum pumps.
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申请公布号 |
US5040949(A) |
申请公布日期 |
1991.08.20 |
申请号 |
US19900531726 |
申请日期 |
1990.06.01 |
申请人 |
ALCATEL CIT |
发明人 |
CRINQUETTE, JEAN-MARIE;LONG, JACQUES |
分类号 |
F04C18/16;F01C1/16;F04B23/14;F04C23/00;F04C25/02;F04C28/02;F04D17/00;F04D17/16;F04D19/04 |
主分类号 |
F04C18/16 |
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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