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公开(公告)号：EP2926007A1
公开(公告)日：2015-10-07
申请号：EP13783652.4
申请日：2013-10-28
申请人： Edwards Limited
发明人： TURNER, Neil , TATTERSALL, Jack Raymond , HOLBROOK, Alan Ernest Kinnaird , WICKES, Matthew Richard
CPC分类号： F04B11/0091 , F04B37/14 , F04B39/0055 , F04B41/06 , F04C18/126 , F04C25/02 , F04C28/28 , F04C29/124
摘要： In situations where a vacuum system is suddenly overloaded, there is a risk of mechanical damage being sustained, for example, bearing damage, gear slippage or rotor and/or stator collisions. Sudden overloads can also lead to electrical damage, for example, over-currents or power surges. Therefore a pressure regulating apparatus is provided for use in a vacuum pumping system having an inlet, an outlet and a conduit interposed between, and in fluid communication with, the inlet and the outlet, wherein the cross-sectional area of the conduit is greater than that required to meet the conductance requirements of the inlet and the outlet.
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公开(公告)号：EP1960671A1
公开(公告)日：2008-08-27
申请号：EP06820652.3
申请日：2006-12-04
申请人： Edwards Limited
发明人： NORTH, Michael Henry , TURNER, Neil , DAVENNE, Tristan Richard Ghislain , DRAPER, Timothy Charles
IPC分类号： F04C18/16
CPC分类号： F04C18/16 , F04C18/084 , F04C2250/201
摘要： A screw pump (10) comprises a stator (12) having a fluid inlet (18) and a fluid outlet (20), the stator housing first and second externally threaded, tapered rotors (26, 28) mounted on respective shafts and adapted for counter-rotation within the stator (12) to compress fluid passing from the fluid inlet to the fluid outlet, wherein the threads (30, 32) have a pitch that increases towards the fluid outlet (20).
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公开(公告)号：EP3969760A1
公开(公告)日：2022-03-23
申请号：EP20728135.3
申请日：2020-05-12
申请人： Edwards Limited
发明人： TURNER, Neil , TURRELL, David Alan
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公开(公告)号：EP3571410A1
公开(公告)日：2019-11-27
申请号：EP18701551.6
申请日：2018-01-19
申请人： Edwards Limited
发明人： TURNER, Neil , TURRELL, David Alan
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公开(公告)号：EP1960671B1
公开(公告)日：2012-07-11
申请号：EP06820652.3
申请日：2006-12-04
申请人： Edwards Limited
发明人： NORTH, Michael Henry , TURNER, Neil , DAVENNE, Tristan Richard Ghislain , DRAPER, Timothy Charles
IPC分类号： F04C18/16
CPC分类号： F04C18/16 , F04C18/084 , F04C2250/201
摘要： A screw pump (10) comprises a stator (12) having a fluid inlet (18) and a fluid outlet (20), the stator housing first and second externally threaded, tapered rotors (26, 28) mounted on respective shafts and adapted for counter-rotation within the stator (12) to compress fluid passing from the fluid inlet to the fluid outlet, wherein the threads (30, 32) have a pitch that increases towards the fluid outlet (20).
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公开(公告)号：EP2137411B1
公开(公告)日：2012-06-20
申请号：EP08737191.0
申请日：2008-04-16
申请人： Edwards Limited
CPC分类号： F04C18/123 , F04C18/084 , F04C18/126 , F04C25/02 , F04C2220/10 , F04C2280/02 , Y10S417/01
摘要： A pair of Northey rotors for a vacuum pump, in which each rotor comprises two opposing, substantially parallel faces, and a peripheral surface located between the opposing faces. In order to reduce damage caused by pumping a gas stream containing liquid or solid particulates, a plurality of grooves is located on the peripheral surface for accommodating the particulates.
摘要翻译： 用于真空泵的一对Northey转子，其中每个转子包括两个相对的基本上平行的面以及位于相对面之间的外围表面。 为了减少泵送含有液体或固体颗粒的气流所造成的损害，多个凹槽位于圆周表面上以容纳颗粒。
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公开(公告)号：EP2137411A1
公开(公告)日：2009-12-30
申请号：EP08737191.0
申请日：2008-04-16
申请人： Edwards Limited
CPC分类号： F04C18/123 , F04C18/084 , F04C18/126 , F04C25/02 , F04C2220/10 , F04C2280/02 , Y10S417/01
摘要： A pair of Northey rotors for a vacuum pump, in which each rotor comprises two opposing, substantially parallel faces, and a peripheral surface located between the opposing faces. In order to reduce damage caused by pumping a gas stream containing liquid or solid particulates, a plurality of grooves is located on the peripheral surface for accommodating the particulates.
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公开(公告)号：EP4013983A1
公开(公告)日：2022-06-22
申请号：EP20760510.6
申请日：2020-08-13
申请人： Edwards Limited
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公开(公告)号：EP3243005B1
公开(公告)日：2019-08-28
申请号：EP16700505.7
申请日：2016-01-06
申请人： Edwards Limited
IPC分类号： F04C25/02
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