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:
Jan. 08, 2013
Filed:
Jun. 09, 2009
Shridhar Gopalan, Westminster, MD (US);
Alan Romack, Columbia, MD (US);
Chunling Zhao, Laurel, MD (US);
Shridhar Gopalan, Westminster, MD (US);
Alan Romack, Columbia, MD (US);
Chunling Zhao, Laurel, MD (US);
Bowles Fluidics Corp., Columbia, MD (US);
Abstract
An enhanced pump assembly includes an impeller and volute casing designed to provide high operating pressures ('P') and flow rates ('Q') with low energy usage. The impeller has a central shaft carrying radially projecting curved primary vanes, and each primary vane also has a twist in the radial direction. Secondary impeller vanes define triangular connecting fillet-like wall segments connecting each primary vane to the impeller shaft. The casing of the pump has a slight spiral deviation so that the pump chamber's radial sidewall flares away from the swept area of the impeller's vanes to define a fluid outlet that contributes to higher P-Q performance, especially when pumping colder fluids.