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:
May. 27, 2025
Filed:
Feb. 09, 2024
Flowserve Pte. Ltd., Singapore, SG;
Ramakrishnan Rengasamy, Fogelsville, PA (US);
Sean A. Cain, Tulsa, OK (US);
Andreas Dreiss, Geestland, DE;
Flowserve Pte. Ltd., Singapore, SG;
Abstract
A system and method of pumping low-density liquids, such as liquid hydrogen (LH2), includes a plurality of integrated motor/pump modules (IMPs) interconnected in series, each having a single IMP impeller. A controller separately adjusts the speeds of the IMP impellers such that a specified head of the pumping system is achieved, while a critical NPSH_c of each IMP remains below its NPSH_A. The IMPs can be identical, and the controller can cause all of the impellers to rotate at the same speed, except for any that require a speed reduction to ensure that its NPSH_c remains below its NPSH_A. The IMPs can comprise induction coils or permanent magnets attached to the impellers that pass in proximate radial or axial alignment with stator coils. The IMPs can be controlled by variable frequency drives (VFDs). A cooling system can transfer heat from within the IMP to an external heat destination.