Metal working – Method of mechanical manufacture – Electrical device making
Patent
1989-05-09
1992-03-17
Echols, P. W.
Metal working
Method of mechanical manufacture
Electrical device making
2642722, 310 88, H02K 1514
Patent
active
050956124
ABSTRACT:
A method involving modifications to a conventional electrical motor for the purpose of increasing its resistance to being damaged by the use of water or other liquids in its environment. The motor is disassembled, and all exposed areas of the stator windings are coated with an epoxy which forms a pliable coating when cured. The slots between the lamination bars of the stator also receive an epoxy coating. A layer of epoxy is formed within the junction box against the motor casing, and the epoxy layer has a portion extending into the lead wire opening of the casing and completely surrounds the lead wires passing outwardly through the opening. The normal bearings for the shaft are replaced with a sealed type bearing, and the endbells of the motor are machined to receive a seal outwardly of the bearings, which seal engages the shaft. The rotor is sprayed with material which forms a tough resilient film thereover. Bore holes of a small diameter are made adjacent the peripheral edges of the endbells to provide a passage from the lowermost portion of the enclosure formed by the casing when the motor is in its finally installed position.
REFERENCES:
patent: 3512024 (1970-05-01), Papa
patent: 4049986 (1977-09-01), Kreuz
patent: 4451750 (1984-05-01), Heuer et al.
patent: 4499390 (1985-02-01), Iwaki et al.
Leeson Brochure, "One Tough Duck".
Baldor Brochure, "Wash Down Duty Motors".
Continental Electric Motor Services Ltd.
Echols P. W.
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