The Charles Machine Works, Inc.

Tyler J Stanley

Blaine S Talbot

Matthew L Lemmons

Thomas Howard Mertz

Chester S McVay

Philip David Campbell

A centrifugal fan is formed from an impeller installed within a casing. The impeller is formed from two plates that are interconnected by a plurality of blades. A duct extends through each blade. At each of its ends, the duct opens at one of the plates. Air enters the fan from through a central opening formed in one of the plates, moves to a medial zone between the plates, and exits the fan at the medial zone's unwalled periphery. Air also crosses the fan by way of the ducts formed within each blade.

Centrifugal fan

A system for cooling an exhaust system of a construction machine. The system has a compartment within which the exhaust system is contained. A first compartment wall forms an external boundary of the compartment and has a plurality of air inlets proximate the exhaust system. A fan assembly is also within the compartment and separated from the exhaust system by a barrier. A conduit crosses the barrier and has an inlet near the exhaust system and an outlet positioned between the barrier and the fan assembly. Air flows within the compartment along an air flow path that extends from the air inlets, around the exhaust system, through the conduit and into the fan assembly. The air flow path extends from the fan assembly through a plurality of air outlets formed in an external compartment wall.

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Edmond, OK, United States of America

Tyler J Stanley