| EDWARDS LIMITED Patent applications |
| Patent application number | Title | Published |
|---|
| 20120100026 | SCROLL COMPRESSOR - A scroll compressor comprises two scrolls ( | 04-26-2012 |
| 20120090338 | METHOD OF TREATING AN EXHAUST GAS STREAM - The present invention provides a method of treating an exhaust gas stream | 04-19-2012 |
| 20120057995 | SIDE-CHANNEL COMPRESSOR WITH SYMMETRIC ROTOR DISC WHICH PUMPS IN PARALLEL - The present invention provides a pump comprising a regenerative pumping mechanism having a generally disc-shaped rotor mounted on an axial shaft for rotation relative to a stator. The rotor has first and second surfaces each having a series of shaped recesses formed in concentric circles thereon, and a stator channel formed in a surface of the stator which faces one of the rotor's first or second surfaces. Each of the concentric circles is aligned with a portion of a stator channel so as to form a section of a gas flow path extending between an inlet and an outlet of the pump, and the rotor divides the section of flow path into sub-sections such that gas can flow towards the outlet simultaneously along any sub-section, channel or rotor side. As a result, the gas being pumped flows in a parallel fashion along both surfaces of the rotor. Thus, this configuration can provide a pumping mechanism where gas pressures on either side of the rotor can be substantially equal or balanced. | 03-08-2012 |
| 20120045322 | VACUUM PUMP - A multi stage vacuum pump for pumping corrosive fluid with a first flow section of material less resistant to corrosion than the material of a second flow section downstream of the first flow section. | 02-23-2012 |
| 20110287373 | PILOT | 11-24-2011 |
| 20110286864 | MULTIPLE INLET VACUUM PUMPS - First and second pump stages provide a flow-path from an inlet to the outlet ( | 11-24-2011 |
| 20110200450 | APPARATUS AND METHOD FOR TUNING PUMP SPEED - An apparatus for tuning pump speed at an optimal or desired speed using an automated method is disclosed. The apparatus includes a vacuum pump connected to a chamber for evacuating gas from the chamber. A sensor measures one or more characteristics, such as pressure, of the gas in the chamber. The measured characteristic is compared to a predetermined value. The speed of vacuum pump is adjusted based on the comparison until it falls in a desired range. | 08-18-2011 |
| 20110123355 | VACUUM PUMP - A vacuum pump surrounded by a ballistic blanket. | 05-26-2011 |
| 20110120184 | PURIFICATION OF A GAS STREAM - At least one gaseous impurity, for example silane, is removed by absorption from a feed gas stream, for example a gas stream comprising nitrogen and hydrogen, the gaseous impurity being less volatile than the feed gas stream. The absorption is effected by a sub-cooled absorbent at a first cryogenic temperature and a first pressure. The absorbent is typically propane. The absorption may be conducted in a liquid-vapour contact column ( | 05-26-2011 |
| 20100126605 | APPARATUS FOR CONVEYING A WASTE STREAM - Apparatus for conveying waste streams exhausted from first and second chambers is provided. The apparatus comprises first conduit means comprising an inlet for receiving a waste stream exhausted from the first chamber, and an outlet, and a second conduit means comprising an inlet for receiving a waste stream exhausted from a second chamber, and an outlet. The outlets of the first and second conduit means are connected together. The first conduit means comprises means for generating sonic choking of gas being conveyed towards the outlet of the first conduit means in order to inhibit migration of a component of the waste stream exhausted from the second chamber towards the first chamber. | 05-27-2010 |
| 20100119399 | VACUUM PUMP - A vacuum pump housing comprises first ( | 05-13-2010 |
| 20100071549 | METHOD OF RECYCLING HYDROGEN - A method is described for recycling hydrogen (H2) supplied to a chamber ( | 03-25-2010 |
| 20100068054 | VACUUM PUMP - A vacuum pump comprises a housing, a drive shaft supported by a beating arrangement for rotation relative to the housing about an axis, and a pumping mechanism comprising a stator component mounted on the housing and a disk-shaped rotor component mounted on the drive shaft axially proximate the stator component. The bearing arrangement comprises a bearing supported in both radial and axial directions by a resilient support, comprising inner and outer annular portions connected by a plurality of flexible members, so that there is a fixed relation between the inner race of the bearing and the outer portion of the resilient support to determine the axial clearance between the rotor and stator components of the pumping mechanism. | 03-18-2010 |
| 20090321271 | Method of Pumping Combustible Gas - A system for pumping a gas stream containing a combustible gas comprises a solid oxide ionic conducting membrane ( | 12-31-2009 |
| 20090304524 | Method of Operating a Pumping System - A pumping system has a motor ( | 12-10-2009 |
| 20090269231 | Method of Pumping Gas - A method of pumping a gas stream containing a condensable species and a light gas and an apparatus therefore, the method comprising the steps of conveying the gas stream to a multistage vacuum pump comprising an inlet stage and an exhaust stage downstream from the inlet stage, and adding to the gas stream upstream of or at the inlet stage a purge gas heavier than said light gas to both inhibit migration of the light gas from the exhaust stage towards the inlet stage and to inhibit condensation of the condensable species within the pump. | 10-29-2009 |
