Vacuum pump
CA 2610255 C · Owner: Edwards Limited · Inventors: Siew, Chan-Cheong; Brewster, Barrie Dudley
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A turbomolecular vacuum pump (54) comprises a housing (70) and a rotor (52) supported by a bearing arrangement (64) for rotation relative to the housing (70). The bearing arrangement (64) comprises a bearing (72 74, 76, 78) , supported in both radial and axial directions by a resilient support (80) comprising inner (86) and outer (88) annular portions connected by a plurality of flexible members (84), the resilient support (80) having a radial stiffness in the range from 50 to 500 N/mm.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed May 26, 2006 and granted August 13, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 26, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.