Electric motor assembly
First Claim
1. An electric motor assembly comprising:
- (a) a field case housing having;
(i) a substantially cylindrical wall segment having a substantially constant wall thickness;
(ii) an end segment having a thickness which is substantially the same as the substantially constant wall thickness of the wall segment;
(iii) a flange around an open end of the housing having a thickness which is substantially the same as the substantially constant wall thickness of the wall segment, the flange having a plurality of flange reinforcing ribs connected to the wall segment, the flange having a plurality of apertures through which attachment members connect the housing to an end plate and having reinforcing bosses around the plurality of apertures; and
(b) an end plate adapted to cover the open end of the housing attached to the flange;
wherein the end segment, the wall segment and the flange are formed as a single, integral part and wherein the plurality of flange reinforcing ribs, the plurality of end segment reinforcing ribs and the substantially constant thicknesses are adapted to reduce warping of the housing as a result of a molding process.
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Accused Products
Abstract
A field case housing has a substantially cylindrical wall segment, an end segment and a flange all having a substantially constant wall thickness. The flange has reinforcing ribs connected to the wall segment and aperture reinforcing bosses. The end segment, the wall segment and the flange are formed as a single, integral part adapted to reduce warping of the housing during molding. A cylindrical guide member is located in the field case housing and a conical guide member is located in the fan baffle. The cylindrical guide member is adapted to insure a screw passing through the cylindrical guide member is guided to a point within the conical guide member. The fan baffle has a transverse wall with an aperture and guide walls extending adjacent the aperture. The guide walls are adapted to guide an armature past the magnets without contacting and damaging them.
75 Citations
20 Claims
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1. An electric motor assembly comprising:
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(a) a field case housing having;
(i) a substantially cylindrical wall segment having a substantially constant wall thickness;
(ii) an end segment having a thickness which is substantially the same as the substantially constant wall thickness of the wall segment;
(iii) a flange around an open end of the housing having a thickness which is substantially the same as the substantially constant wall thickness of the wall segment, the flange having a plurality of flange reinforcing ribs connected to the wall segment, the flange having a plurality of apertures through which attachment members connect the housing to an end plate and having reinforcing bosses around the plurality of apertures; and
(b) an end plate adapted to cover the open end of the housing attached to the flange;
wherein the end segment, the wall segment and the flange are formed as a single, integral part and wherein the plurality of flange reinforcing ribs, the plurality of end segment reinforcing ribs and the substantially constant thicknesses are adapted to reduce warping of the housing as a result of a molding process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An electric motor assembly comprising:
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a cylindrical guide member associated with a screw insertion aperture having a diameter and located in a field case housing or a fan baffle;
a conical guide member associated with a screw receiving aperture in the other of the field case housing or the fan baffle, the conical guide member having a distal end which is larger than a diameter of the screw insertion aperture;
at least one magnet located between the cylindrical guide member and the conical guide member which exerts a magnetic force on a screw passing from the cylindrical guide member to the conical guide member;
wherein the cylindrical guide member is adapted to insure a tip of a screw passing through the cylindrical guide member is guided to a point within the diameter of the conical guide member. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification