Marathon Electric Mfg. Corp.

David L Konkol

Duane R Nolte

A standard induction motor includes an outer bearing including first and second end brackets joined to the opposite end of a tubular main frame by through bolts. Each of the end brackets is a cup-shaped member with a circular outer wall and a flat outer radial wall. The first end bracket has four spaced air inlet openings in the circular wall with axial cross bars forming elongated air passageways. A separate rodent guard unit is secured to each ventilation opening and includes an outer plate abutting the exterior of the circular wall and having integral clip members engaging edges of the ventilation opening. Each plate has circumferentially elongated openings extending across the cross bars to form small rodent excluding passageways. The second end bracket has a L-shaped ventilation opening in the circular wall and the radial wall. An L-shaped rodent guard has axially spaced wires overlying the air outlet opening in the circular wall and radially spaced wires overlying the ventilation opening in the radial wall. The wires are connected to each other by circumferentially spaced L-shaped support wires. Two of the radial wires abut the radial wall to opposite ends of through bolt openings and are secured in place by the through bolts and spanning a washer.

Growing community of inventors

Wausau, WI, United States of America

David L Konkol