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. 26, 2022
Filed:
Dec. 03, 2014
Flowserve Management Company, Irving, TX (US);
Andreas Dreiss, Hamburg, DE;
Rehan Farooqi, San Marino, CA (US);
Stefano Tosin, Braunschweig, DE;
Jens Friedrichs, Schwulper, DE;
Andreas Dreiss, Hamburg, DE;
Rehan Farooqi, San Marino, CA (US);
Stefano Tosin, Braunschweig, DE;
Jens Friedrichs, Schwulper, DE;
Flowserve Management Company, Irving, TX (US);
Abstract
A centrifugal pump with a rotating impeller and a rotating diffuser. The diffuser may be rotated with a controlled speed to broaden the operational range of the pump. Such control may be done independently of the rotational speed of the impeller to tailor pump operation to a particular NPSH, efficiency, fluid flow or related requirement. In one preferred form, the impeller and diffuser are made to counter-rotate relative to one another, while the independent rotational speed of each may be provided by one or more motors, as well as a variable-speed transmission coupled to such motor or motors. Such a pump is optimized for specific speed operating ranges beneath those associated with axial flow pump configurations.