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:
Apr. 24, 2007
Filed:
Dec. 17, 2002
Applicants:
David Heaps, Leeds, GB;
Andrew G. L. Blackwood, Leeds, GB;
Inventors:
David Heaps, Leeds, GB;
Andrew G. L. Blackwood, Leeds, GB;
Assignee:
Wabco Automotive UK Limited, , GB;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 49/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A rotating vane vacuum pump has a secondary inlet () which permits additional suction after the primary inlet () has closed.