Field assemblies and methods of making same
First Claim
Patent Images
1. An electric motor, comprising:
- a. a stator having pole pieces on which field coils are disposed and return path pieces mated to the pole pieces, the stator having an outside diameter; and
b. an armature having an outside diameter that is at least 0.625 of the outside diameter of the stator.
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Accused Products
Abstract
An electric motor, power tool using the electric motor, and method of making the electric motor includes making a stator by separately forming pole pieces, return path pieces and field coils. The field coils are placed over necks of the pole path pieces and the return path pieces are affixed to the pole pieces. An armature having an outside diameter of at least 0.625 the outside diameter of the stator is placed in the stator. In an aspect, the field coils are formed so that they extend beyond pole tips of the pole pieces.
255 Citations
103 Claims
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1. An electric motor, comprising:
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a. a stator having pole pieces on which field coils are disposed and return path pieces mated to the pole pieces, the stator having an outside diameter; and b. an armature having an outside diameter that is at least 0.625 of the outside diameter of the stator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An electric motor, comprising:
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a. a stator having pole pieces on which field coils are disposed and return path pieces mated to the pole pieces, the field coils extending beyond pole tips of the pole pieces on which they are disposed, the stator having an outside diameter; and b. an armature having an outside diameter that is at least 0.625 of the outside diameter of the stator. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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44. A hand-held power tool, comprising:
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a. a housing; and b. a motor disposed in the housing, the motor including; i. a stator having pole pieces on which field coils are disposed and return path pieces mated to the pole pieces, the stator having an outside diameter; and ii. an armature having an outside diameter that is at least 0.625 of the outside diameter of the stator. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52, 83)
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53. A hand-held power tool, comprising:
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a. a housing; b. a motor disposed in the housing; c. the motor including; i. a stator having pole pieces on which field coils are disposed and return path pieces mated to the pole pieces, the field coils extending beyond pole tips of the pole pieces on which they are disposed, the stator having an outside diameter; and ii. an armature having an outside diameter that is at least 0.625 of the outside diameter of the stator. - View Dependent Claims (54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 84, 85)
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86. An electric motor of a predetermined frame size having increased power compared to a needle wound motor of the same frame size, comprising:
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a. a stator having pole pieces on which field coils are disposed and return path pieces mated to the pole pieces, the field coils extending beyond pole tips of the pole pieces on which they are disposed, the stator having an outside diameter; b. an armature having an outside diameter that is at least 0.625 of the outside diameter of the stator; and c. the field coils formed to provide the motor with a maximum power output at a desired speed that is at least ten percent greater than a maximum power output at the desired speed of the needle wound motor of the same frame size. - View Dependent Claims (87, 88, 89, 90, 91, 92, 93, 94)
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95. A hand-held power tool, comprising:
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a. a housing; b. a motor of a predetermined frame size disposed in the housing, the motor having increased power compared to a needle wound motor of the same frame size, the motor including; i. a stator having pole pieces on which field coils are disposed and return path pieces mated to the pole pieces, the field coils extending beyond pole tips of the pole pieces on which they are disposed, the stator having an outside diameter; ii. an armature having an outside diameter that is at least 0.625 of the outside diameter of the stator; and iii. the field coils formed to provide the motor with a maximum power output at a desired speed that is at least ten percent greater than a maximum power output at a desired speed of the needle wound motor of the same frame size. - View Dependent Claims (96, 97, 98, 99, 100, 101, 102, 103)
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Specification