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:
Jul. 01, 2025
Filed:
Apr. 29, 2022
Applicant:
Edwards Limited, Burgess Hill, GB;
Inventor:
Michael Henry North, Burgess Hill, GB;
Assignee:
Edwards Limited, Burgess Hill, GB;
Primary Examiner:
Int. Cl.
CPC ...
F04C 18/12 (2006.01); F04C 25/02 (2006.01); F04C 28/24 (2006.01); F04C 28/26 (2006.01); F04C 29/04 (2006.01);
U.S. Cl.
CPC ...
F04C 25/02 (2013.01); F04C 18/126 (2013.01); F04C 28/24 (2013.01); F04C 28/26 (2013.01); F04C 29/04 (2013.01); F04C 2240/10 (2013.01); F04C 2240/30 (2013.01);
Abstract
At least a part of a stator for a vacuum pump, comprising: a plurality of walls defining therebetween at least a part of a pumping chamber; a channel formed within one or more of the walls of the plurality of walls, the channel comprising a first opening at a first end of the channel and a second opening at a second end of the channel, the first opening being an opening in an internal surface of the one or more of the walls and being in fluid communication with the pumping chamber; and a pressure relief valve disposed within the channel.