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:
Mar. 19, 2019
Filed:
Feb. 23, 2016
Franklin Electric Co., Inc., Fort Wayne, IN (US);
James J. Volk, Fort Wayne, IN (US);
Franklin Electric Co., Inc., Fort Wayne, IN (US);
Abstract
A multistage submersible pump includes interstage sealing operable to inhibit upstream fluid recirculation, while also having a reduced or eliminated wear-in procedure. A wear-in bearing surface erodes during an initial, wear-in procedure of the pump, and a low-friction service bearing surface slowly engages as the wear-in procedure is completed. Both the wear-in and service bearing surfaces are integrated into a single, stamped stainless steel housing component, such that axial tolerance between the two surfaces is tightly controllable. The pump impeller provides corresponding wear-in and service bearing elements formed as part of a single monolithic component, thereby also offering tight axial tolerance control for the bearing elements which engage the bearing surfaces of the cup component. During initial operation of the pump, only a small portion of the wear-in bearing element is required to wear down to allow engagement of the service bearing element, thereby minimizing the required time to achieve optimal pump performance and enabling the use of a wide range of materials for the pump impeller.