The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 22, 2017
Filed:
Mar. 19, 2014
Applicant:
Edwards Limited, Crawley, West Sussex, GB;
Inventors:
Alan Ernest Kinnaird Holbrook, Pulborough, GB;
Sivabalan Kailasam, Gyeonggi-do, KR;
Ross Gordon Eadie, Chichester, GB;
Assignee:
Edwards Limited, Crawley, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01C 19/00 (2006.01); F04C 27/00 (2006.01); F01C 21/10 (2006.01); F04C 23/00 (2006.01); F04C 25/02 (2006.01); F04C 18/12 (2006.01);
U.S. Cl.
CPC ...
F04C 27/006 (2013.01); F01C 19/005 (2013.01); F01C 21/10 (2013.01); F04C 23/008 (2013.01); F04C 25/02 (2013.01); F04C 27/001 (2013.01); F04C 18/123 (2013.01); F04C 18/126 (2013.01);
Abstract
A multi-stage vacuum pump may include a sealing arrangement for sealing between the stator components of the pump. The end seals of the arrangement comprise an annular portion for sealing between end stator components and shell components and axial portions which extend from the annular portion and together with separate axial seals seal between the shell components.