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. 06, 2013
Filed:
Oct. 01, 2007
Stephen Dowdeswell, Cuckfield, GB;
Nigel Paul Schofield, Horsham, GB;
Peter Hugh Birch, Horsham, GB;
Stephen Dowdeswell, Cuckfield, GB;
Nigel Paul Schofield, Horsham, GB;
Peter Hugh Birch, Horsham, GB;
Edwards Limited, , GB;
Abstract
A vacuum pump housing comprises first () and second half-shell stator components () defining a plurality of pumping chambers separated by partition members (). Each pumping chamber comprises an inlet port () for receiving fluid and an outlet port () through which pumped fluid is exhausted from the chamber. The inlet ports are open on an external surface of the first stator component, and the outlet ports are open on an opposing external surface of the second stator component. The stator components further define transfer channels () for conveying fluid between the pumping chambers. Each transfer channel preferably comprises first and second portions located on opposite sides of the housing.