Reverse fin cooling fan

US10167766B2 · kind B2 · utility

Assignee

• Briggs & Stratton, LLC · US

Inventors

• Brett Birschbach · Wauwatosa, US
• Rodney Balzar · Wauwatosa, US
• Jeffery P. Feist · Pewaukee, US
• Casey Groh · Shorewood, US
• Brian Johnson · Kewaskum, US
• Randall J. Klotka · Grafton, US
• Darwin A. Podhola · Mukwonago, US
• Ryan Sullivan · West Bend, US
• Matt Martinek · Cedarburg, US
• Brian Paul · West Bend, US

Key dates

• Filing date: May 12, 2016
• Grant date: Jan 1, 2019
• Expiry date: Oct 8, 2036

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2250/70
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An engine assembly includes a crankcase, shaft, blower housing, and cooling fan. The shaft is rotatably coupled to the crankcase and defines a rotational axis. The blower housing includes an internal space. The cooling fan is disposed within the internal space, includes a plate defining an upper surface, and is positioned to rotate with the shaft about the rotational axis. The cooling fan includes a band having an inner band radius and an outer band radius. The cooling fan includes a plurality of reversed fins extending between the band and the upper surface and between a root adjacent to the rotational axis and a tip adjacent to the outer band radius, each fin offset at an angle measured in a counterclockwise direction from a plane passing through the rotational axis and the tip to a plane passing through the root and the tip when viewed from above the cooling fan.