发明授权
- 专利标题： Thread groove type vacuum pump
- 专利标题（中）： 螺纹槽式真空泵
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申请号： US896470申请日： 1986-08-14
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公开(公告)号： US4708586A公开(公告)日： 1987-11-24
- 发明人: Tadashi Sawada , Tatsuji Ikegami , Masashi Iguchi
- 申请人： Tadashi Sawada , Tatsuji Ikegami , Masashi Iguchi
- 申请人地址： JPX Wako JPX Osaka
- 专利权人： Rikagaku Kenkyusho,Osaka Vacuum, Ltd.
- 当前专利权人： Rikagaku Kenkyusho,Osaka Vacuum, Ltd.
- 当前专利权人地址： JPX Wako JPX Osaka
- 优先权： JPX60-179039 19850814; JPX60-179040 19850814; JPX60-179041 19850814
- 主分类号： F04D19/04
- IPC分类号： F04D19/04 ; F04D3/02
摘要：
A hollow cylindrical stator and a cylindrical rotor are disposed in the stator with a gap therebetween, the inner peripheral surface of the stator or the outer peripheral surface of the rotor being provided with a helical groove, or thread groove, and evacuation being performed by rotation of the rotor. The width of the helical groove adjacent the suction side of the pump is larger than the width of a ridge between adjacent turns of the groove.
公开/授权文献
- US5193577A Sludge pump valve 公开/授权日：1993-03-16
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