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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.:

US 12618413 B1

PDFFull Text
Date of Patent:
May. 05, 2026

Filed:

Jun. 15, 2023

Method for controlling of a pump unit and a pump unit for pumping liquid or suspension

Applicant:

Sulzer Management Ag, Winterthur, CH;

Inventors:

Janne Ripattila, Kotka, FI;

Kalle Tiitinen, Kotka, FI;

Assignee:

SULZER MANAGEMENT, Winterthur, CH;

Attorney:

Spencer Fane, LLP

Primary Examiner:

Eric J Zamora Alvarez

Int. Cl.
CPC ...
F04D 27/00 (2006.01); F04D 1/00 (2006.01); F04D 1/06 (2006.01); F04D 7/04 (2006.01); F04D 9/00 (2006.01); F04D 9/02 (2006.01); F04D 13/06 (2006.01); F04D 15/00 (2006.01); F04D 29/22 (2006.01); F04D 29/66 (2006.01); F04D 31/00 (2006.01);
U.S. Cl.
CPC ...
F04D 27/00 (2013.01); F04D 1/00 (2013.01); F04D 1/06 (2013.01); F04D 7/04 (2013.01); F04D 9/02 (2013.01); F04D 13/06 (2013.01); F04D 15/00 (2013.01); F04D 29/22 (2013.01); F04D 29/2261 (2013.01); F04D 29/66 (2013.01); F04D 31/00 (2013.01);
Abstract

A method for controlling a pump unit includes controlling the pump unit based on a determination of a combination of an inducer and a centrifugal pump at least on parameters of total volumetric flow rate and pressure difference over the pump unit, and controlling the pump unit based on a surface level on a suction side of the pump unit, and an NPSHaA at an inlet before the pump unit is measured, calculated or otherwise determined, and, the output power of the inducer is increased or decreased to affect a NPSHaB at the flow channel before the impeller, so that during operation of the pump unit the NPSHaB is greater than a NPSHr of the centrifugal pump.

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Ripattila, Janne. (2026). Method for controlling of a pump unit and a pump unit for pumping liquid or suspension (U.S. Patent No. 12618413). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12618413

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