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. 21, 2009
Filed:
Apr. 18, 2006
Applicants:
Drew J. Van Norman, Whitewater, WI (US);
Curt Hagen, Delavan, WI (US);
Inventors:
Drew J. Van Norman, Whitewater, WI (US);
Curt Hagen, Delavan, WI (US);
Assignee:
SPX Corporation, Charlotte, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04C 2/00 (2006.01); F04C 27/02 (2006.01); F04C 29/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
An improved pump and pumping method includes a circumferential positive displacement pump having two counter rotating rotors. A clearance gap is defined between the rotor shaft, and a body hub portion of the body that forms the chamber.