David Joseph Konkol

US Patent:

52834905, Feb 1, 1994

Filed:

Jan 11, 1993

Appl. No.:

8/002137

Inventors:

Duane R. Nolte - Wausau WI
David L. Konkol - Wausau WI

Assignee:

Marathon Electric Mfg. Corp. - Wausau WI

International Classification:

H02K 500

US Classification:

310 89

Abstract:

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.