Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
183 words
A commutator motor comprising a housing, a stator consisting of a plurality of laminations embedded in the housing and defining at least a pair of circumferentially spaced yoke portions and pole portions intermediate the yoke portions, a rotor rotatably supported in the stator cavity, the yoke portions being of a predetermined configuration defining first axial channels having inlet and outlet openings to facilitate flow of cooling medium through the channels in one direction, a commutator chamber at one axial end of the rotor separated by a circumferentially extending wall, said circumferentially extending wall extending radially inwardly close to the rotor and spaced therefrom to define a small annular gap, the arrangement providing a pumping action of cooling medium through the commutator chamber, means defining second channels outboard of the stator and pole portions including a wall portion separating said second channels and said stator cavity communicating with said chamber at one end and fan means to circulate a cooling medium through said second channels and chamber in an axial direction opposite the direction of flow of said cooling medium through said first channels.
Claim 2
Dependent Claim
183 words
A commutator motor comprising a housing, a stator consisting of a plurality of laminations embedded in the housing and defining at least a pair of circumferentially spaced yoke portions and pole portions intermediate the yoke portions, a rotor rotatably supported in the stator cavity, the yoke portions being of a predetermined configuration defining first axial channels having inlet and outlet openings to facilitate flow of cooling medium through the channels in one direction, a commutator chamber at one axial end of the rotor separated by a circumferentially extending wall, said circumferentially extending wall extending radially inwardly close to the rotor and spaced therefrom to define a small annular gap, the arrangement providing a pumping action of cooling medium through the commutator chamber, means defining second channels outboard of the stator and pole portions including a wall portion separating said second channels and said stator cavity communicating with said chamber at one end and fan means to circulate a cooling medium through said second channels and chamber in an axial direction opposite the direction of flow of said cooling medium through said first channels.
Claim 3
Dependent Claim
34 words
A commutator motor as claimed in claim 1, wherein the inlet openings for said first axial channels are disposed between brush holders in the commutator chamber and the yoke portions outside the commutator chamber.
Claim 4
Dependent Claim
30 words
A commutator motor as claimed in claim 1 wherein the outlet openings for the first axial channels are arranged at the front side of the motor adjacent the yoke portions.
Claim 5
Dependent Claim
30 words
A commutator motor as claimed in claim 1 wherein the inlet openings for the cooling medium to the second axial channels are located at the front side of the motor.
Claim 6
Dependent Claim
36 words
A commutator motor as claimed in claim 1 wherein the stator laminations are arranged in a longitudinal direction and have edge portions bent radially inwardly toward the stator cavity and including windings circumscribing the yoke portions.
Claim 7
Dependent Claim
23 words
A commutator motor as claimed in claim 1 wherein said fan means has an outer diameter greater than the diameter of said rotor.