Pumping group
申请(专利)号： FR20240072247
专利号： FR3089261A1 主分类号： F04C25/02 申请权利人： PFEIFFER
VACUUM
公开国代码： FR 优先权国家： FR
摘 要：
The present invention relates to a pumping unit comprising: a primary vacuum pump, a Roots type vacuum
pump (3) comprising a pumping stage (7) having a stator (9) inside which two rotors (5) Roots are configured to rotate
synchronously in the opposite direction to cause a gas to be pumped between an inlet orifice (10) and an outlet orifice (11), a pipe (13) connecting the outlet orifice ( 11) to an intake (12) of the primary vacuum pump (2), characterized in that the smallest distance (d) between an edge of the outlet orifice (11) and each of the rotors (5) in the 'pumping stage (7) is at least less than three centimeters. FIGURE: 2 主权项：
申请日： 2024-12-03 公开公告日： 2024-06-05
分类号： F04C25/02;
F04C18/12
发明设计人： SERGE
BRANDOLIN;
MICKAEL RUSCONI; YANNICK GRENIER; JULIEN VALENTIN 申请国代码： FR
优先权： 20241203 FR
1872247
摘 要 附 图：
权 利 要 求 说 明 书
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说 明 书
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Pumping group
