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:
Nov. 25, 2025
Filed:
Jul. 11, 2023
Crane Pumps & Systems Pft Corp., Piqua, OH (US);
Kirk Neer, St. Paris, OH (US);
Mark Kowalak, Troy, OH (US);
Crane Pumps & Systems PFT Corp., Piqua, OH (US);
Abstract
A circulation system is provided to move a coolant liquid in a coolant chamber () formed between a housing () and a motor shroud () of a pump () for a fluid being worked upon. The circulation system has a coolant impeller () in a coolant impeller chamber (). The coolant impeller is driven by a drive shaft () that also drives a primary impeller () that moves the fluid being worked on. The coolant impeller is positioned along the drive shaft between the motor and the primary impeller. The coolant impeller has a wide inner portion () and a peripheral base disk () that define a radially-offset suction eye () and support a plurality of impeller blades (). A seal spring () compressively acts on the inner portion, providing a mechanical seal.