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:
Feb. 02, 2016
Filed:
Aug. 28, 2014
Applicant:
Edwards Limited, Crawley, West Sussex, GB;
Inventors:
Ian David Stones, Burgess Hill, GB;
Nigel Paul Schofield, Horsham, GB;
Martin Nicholas Stuart, Shoreham-by-Sea, GB;
Assignee:
Edwards Limited, Crawley, West Sussex, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D 19/04 (2006.01); F04D 17/16 (2006.01); F04D 23/00 (2006.01); H01J 49/24 (2006.01);
U.S. Cl.
CPC ...
F04D 19/042 (2013.01); F04D 17/168 (2013.01); F04D 19/044 (2013.01); F04D 19/046 (2013.01); F04D 23/008 (2013.01); H01J 49/24 (2013.01);
Abstract
A vacuum pump comprises a molecular drag pumping mechanism and a regenerative pumping mechanism. A rotor element of the molecular drag pumping mechanism surrounds rotor elements of the regenerative pumping mechanism.