Crane Pumps & Systems Pft Corp.

Kirk Neer

Mark Kowalak

Alex Crabtree

Chih Lin

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.

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St. Paris, OH, United States of America

Kirk Neer