Patent US5083052A successfully refreshed from Google Patents.
US5083052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric fan motor and a method for producing the same
Assignee: Daikin Industries Ltd
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Filing: 1990-10-01
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Granted: 1992-01-21
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Expires: 2010-10-01
Abstract
Abstract An electric rotary machine such as a motor has a rotor having a plurality of poles, a stator having a plurality of poles confronting the poles of the rotor in a radial direction, and a casing, for the rotor, having a cylindrical portion which extends in an axial direction. A permanent magnet composed of a mixed material of magnetic powder and a binder being a thermosetting resin constitutes the poles of the rotor. The permanent magnet, which is ring-shaped, is mounted in the casing along an inner circumference of the cylindrical portion of the casing in a circumferential direction. A yoke member is mounted around an outer circumference of the cylindrical portion of the casing, and a plurality of openings penetrate the cylindrical portion and the yoke member at the same time. The permanent magnet has a plurality of projections monolithically formed on its outer circumference. The projections are fitted in the respective openings in the yoke member and cylindrical portion.
Inventors
- 👤 Joji Ochi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:35
CPC Classifications
H; H02; H02K; H02K29/00; H02K29/06; H02K29/08; H02K1/00; H02K1/06; H02K1/12; H02K1/18; H02K1/187; H02K1/22; H02K1/27; H02K1/2786; H02K1/2787; H02K1/2789; H02K1/2791; H02K11/00; H02K11/04; H02K11/049; H02K11/05; H02K15/00; H02K15/02; H02K15/03; H02K21/00; H02K21/12; H02K21/22; H02K3/00; H02K3/46; H02K3/47; H02K7/00; H02K7/14; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49012
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
224 words
A method for producing an electric motor wherein a casing made of a magnetic material for a part of the motor selected from the group consisting of a rotor or a stator, includes a mounting area perpendicularly intersecting a rotary shaft, and a cylindrical portion axially extending from an outer edge of the mounting area, and wherein an annular permanent magnet is circumferentially disposed along an inner circumferential surface of the cylindrical portion, comprising the steps of: (a) pouring a mixture of magnetic power and a binder into the casing; (b) compression-molding the mixture into an annular shape fitting the inner circumferential surface of the cylindrical portion to form a molded piece; (c) curing the binder in the molded piece; (d) magnetizing the molded piece to form a permanent magnet; (e) forming a separating member composed of a nonmagnetic material for magnetically separating the mounting area from the permanent magnet; (f) forming concave or convex engagement portions on an end face of the separating member; and (g) mounting the separating member to the mounting area in a manner that the other end face of the separating member is in contact with the mounting area; wherein the pouring and compression-molding steps follow the mounting step to provide an end face of the molded piece with a configuration fitting the engagement portions of the separating member.
Claim 2
Independent Claim
224 words
A method for producing an electric motor wherein a casing made of a magnetic material for a part of the motor selected from the group consisting of a rotor or a stator, includes a mounting area perpendicularly intersecting a rotary shaft, and a cylindrical portion axially extending from an outer edge of the mounting area, and wherein an annular permanent magnet is circumferentially disposed along an inner circumferential surface of the cylindrical portion, comprising the steps of: (a) pouring a mixture of magnetic power and a binder into the casing; (b) compression-molding the mixture into an annular shape fitting the inner circumferential surface of the cylindrical portion to form a molded piece; (c) curing the binder in the molded piece; (d) magnetizing the molded piece to form a permanent magnet; (e) forming a separating member composed of a nonmagnetic material for magnetically separating the mounting area from the permanent magnet; (f) forming concave or convex engagement portions on an end face of the separating member; and (g) mounting the separating member to the mounting area in a manner that the other end face of the separating member is in contact with the mounting area; wherein the pouring and compression-molding steps follow the mounting step to provide an end face of the molded piece with a configuration fitting the engagement portions of the separating member.
Claim 3
Dependent Claim
41 words
The method as claimed in claim 1, wherein convex molding portions are formed on a molding surface of a compression mold used in the compression-molding step to provide the other end face of the molded piece with portions for mounting counterbalances.
Claim 4
Dependent Claim
16 words
The method as claimed in claim 1, wherein the magnetic powder is composed of rare-earth elements.
Claim 5
Dependent Claim
192 words
An electric motor comprising: a rotor having a plurality of poles; a stator having a plurality of poles confronting the poles of the rotor in a radial direction; a permanent magnet which is composed of magnetic power and a binder being a thermosetting resin and which constitutes poles selected from the group consisting of poles of the rotor or poles of the stator, the permanent magnet having projections on one end face in an axial direction and recesses on the other end face; a generally cup-shaped casing made of a magnetic material and having a vertical portion and a cylindrical portion which extends in an axial direction from an edge of the vertical portion for accommodating the permanent magnet along an inner circumference of the cylindrical portion in a circumferential direction; and a nonmagnetic separating member which is disposed between the vertical portion of the casing and the permanent magnet along another circumference of the cylindrical portion of the casing so that the vertical portion of the casing is magnetically insulated from the permanent magnet, the separating member having recesses to receive the projections of the permanent magnet on one end face.
Claim 6
Dependent Claim
192 words
An electric motor comprising: a rotor having a plurality of poles; a stator having a plurality of poles confronting the poles of the rotor in a radial direction; a permanent magnet which is composed of magnetic power and a binder being a thermosetting resin and which constitutes poles selected from the group consisting of poles of the rotor or poles of the stator, the permanent magnet having projections on one end face in an axial direction and recesses on the other end face; a generally cup-shaped casing made of a magnetic material and having a vertical portion and a cylindrical portion which extends in an axial direction from an edge of the vertical portion for accommodating the permanent magnet along an inner circumference of the cylindrical portion in a circumferential direction; and a nonmagnetic separating member which is disposed between the vertical portion of the casing and the permanent magnet along another circumference of the cylindrical portion of the casing so that the vertical portion of the casing is magnetically insulated from the permanent magnet, the separating member having recesses to receive the projections of the permanent magnet on one end face.
Claim 7
Dependent Claim
34 words
The electric motor as claimed in claim 4, wherein the magnetic powder is composed of rare-earth elements, and a mixture ratio of the binder to the magnetic powder is 5 to 10% by weight.
Claim 8
Dependent Claim
150 words
An electric rotary machine comprising: a rotor having a plurality of poles; a stator having a plurality of poles confronting the poles of the rotor in a radial direction; a permanent magnet which is composed of magnetic power and a binder being a thermosetting resin and which constitutes poles selected from the group consisting of a rotor or the poles of the stator; a casing having a cylindrical portion which extends in an axial direction for accommodating the permanent magnet along an inner circumference of the cylindrical portion in a circumferential direction; a yoke member which is mounted around an outer circumference of the cylindrical portion of the casing; a plurality of openings which penetrate the cylindrical portion and the yoke member at the same time; and a plurality of projections to be fitted in the openings, the projections being monolithically formed on an outer circumference of the permanent magnet.
Claim 9
Dependent Claim
150 words
An electric rotary machine comprising: a rotor having a plurality of poles; a stator having a plurality of poles confronting the poles of the rotor in a radial direction; a permanent magnet which is composed of magnetic power and a binder being a thermosetting resin and which constitutes poles selected from the group consisting of a rotor or the poles of the stator; a casing having a cylindrical portion which extends in an axial direction for accommodating the permanent magnet along an inner circumference of the cylindrical portion in a circumferential direction; a yoke member which is mounted around an outer circumference of the cylindrical portion of the casing; a plurality of openings which penetrate the cylindrical portion and the yoke member at the same time; and a plurality of projections to be fitted in the openings, the projections being monolithically formed on an outer circumference of the permanent magnet.
Claim 10
Dependent Claim
18 words
The electric rotary machine as claimed in claim 6, wherein the magnetic powder is composed of rare-earth elements.
Claim 11
Dependent Claim
245 words
An electric rotary machine comprising: a rotor having a plurality of poles; a stator having a plurality of poles confronting the poles of the rotor in a radial direction; a permanent magnet which is composed of magnetic power and a binder being a thermosetting resin and which constitutes poles selected from the group consisting of the rotor or poles of the stator; a casing having a cylindrical portion which extends in an axial direction for accommodating the permanent magnet along an inner circumference of the cylindrical portion in a circumferential direction; a yoke member which is mounted around an outer circumference of the cylindrical portion of the casing; a plurality of openings which penetrate the cylindrical portion and the yoke member at the same time; a plurality of projections to be fitted in the openings, the projections being monolithically formed on an outer circumference of the permanent magnet; and wherein the casing has a vertical mounting portion and the cylindrical portion to be generally cup-shaped, the permanent magnet has projections on one end face in an axial direction, a separating member made of a nonmagnetic material is disposed between the vertical portion of the casing and the permanent magnet along an outer circumference of the cylindrical portion of the casing so that the vertical portion of the casing is magnetically insulated from the permanent magnet, and the separating member has recesses to receive the projections provided on said one end face of the permanent magnet.
Claim 12
Dependent Claim
245 words
An electric rotary machine comprising: a rotor having a plurality of poles; a stator having a plurality of poles confronting the poles of the rotor in a radial direction; a permanent magnet which is composed of magnetic power and a binder being a thermosetting resin and which constitutes poles selected from the group consisting of the rotor or poles of the stator; a casing having a cylindrical portion which extends in an axial direction for accommodating the permanent magnet along an inner circumference of the cylindrical portion in a circumferential direction; a yoke member which is mounted around an outer circumference of the cylindrical portion of the casing; a plurality of openings which penetrate the cylindrical portion and the yoke member at the same time; a plurality of projections to be fitted in the openings, the projections being monolithically formed on an outer circumference of the permanent magnet; and wherein the casing has a vertical mounting portion and the cylindrical portion to be generally cup-shaped, the permanent magnet has projections on one end face in an axial direction, a separating member made of a nonmagnetic material is disposed between the vertical portion of the casing and the permanent magnet along an outer circumference of the cylindrical portion of the casing so that the vertical portion of the casing is magnetically insulated from the permanent magnet, and the separating member has recesses to receive the projections provided on said one end face of the permanent magnet.
Claim 13
Independent Claim
259 words
A method for producing an electric rotary machine wherein poles provided in a rotor confronting poles provided in a stator, and poles selected from the group consisting of the poles of the rotor or the poles of the stator are constituted from a permanent magnet, comprising the steps of: (a) forming a casing of a nonmagnetic material for the rotor or the stator so that the casing has cylindrical portion extending in an axial direction for mounting the permanent magnet; (b) forming a plurality of openings in the cylindrical portion and a yoke member to be fitted around the cylindrical portion; (c) arranging the cylindrical portion of the casing and the yoke member so that the openings of the cylindrical portion and the openings of the yoke member are radially aligned when the yoke member is mounted around the cylindrical portion; (d) fitting a generally ring-shaped nonmagnetic spacer onto an inner surface of the vertical area so that an outer circumferential surface of the spacer is in contact with an inner circumferential surface of the cylindrical portion of the casing; (e) pouring a mixture of magnetic power and a binder inside the cylindrical portion along an inner surface of the cylindrical portion as well as in the openings; (f) compression-molding the mixture to form a molded piece; (g) curing the binder; (h) magnetizing the molded piece to form a permanent magnet; and (i) forming a vertical mounting area to continue from the cylindrical portion in a manner that the vertical mounting area intersects a shaft substantially at right angles;
Claim 14
Independent Claim
259 words
A method for producing an electric rotary machine wherein poles provided in a rotor confronting poles provided in a stator, and poles selected from the group consisting of the poles of the rotor or the poles of the stator are constituted from a permanent magnet, comprising the steps of: (a) forming a casing of a nonmagnetic material for the rotor or the stator so that the casing has cylindrical portion extending in an axial direction for mounting the permanent magnet; (b) forming a plurality of openings in the cylindrical portion and a yoke member to be fitted around the cylindrical portion; (c) arranging the cylindrical portion of the casing and the yoke member so that the openings of the cylindrical portion and the openings of the yoke member are radially aligned when the yoke member is mounted around the cylindrical portion; (d) fitting a generally ring-shaped nonmagnetic spacer onto an inner surface of the vertical area so that an outer circumferential surface of the spacer is in contact with an inner circumferential surface of the cylindrical portion of the casing; (e) pouring a mixture of magnetic power and a binder inside the cylindrical portion along an inner surface of the cylindrical portion as well as in the openings; (f) compression-molding the mixture to form a molded piece; (g) curing the binder; (h) magnetizing the molded piece to form a permanent magnet; and (i) forming a vertical mounting area to continue from the cylindrical portion in a manner that the vertical mounting area intersects a shaft substantially at right angles;
Claim 15
Dependent Claim
23 words
The method as claimed in claim 9, wherein the spacer has recesses on one end face to receive part of the permanent magnet.
Claim 16
Dependent Claim
117 words
A fan apparatus having a fan motor, an end bracket for supporting the fan motor, and a circuit board equipped with heat generation elements and disposed in opposition to the end bracket, wherein: the heat generation elements are disposed in a peripheral portion of the circuit board; a heat release surface of each heat generation element is in contact with the end bracket; elastic members are disposed between the end bracket and the respective heat generation elements; and clamping members made of generally U-shaped elastic pieces are provided to clamp the end bracket and the circuit board so that the heat release surfaces of the heat generation elements are held in close contact with the end bracket.
Claim 17
Dependent Claim
117 words
A fan apparatus having a fan motor, an end bracket for supporting the fan motor, and a circuit board equipped with heat generation elements and disposed in opposition to the end bracket, wherein: the heat generation elements are disposed in a peripheral portion of the circuit board; a heat release surface of each heat generation element is in contact with the end bracket; elastic members are disposed between the end bracket and the respective heat generation elements; and clamping members made of generally U-shaped elastic pieces are provided to clamp the end bracket and the circuit board so that the heat release surfaces of the heat generation elements are held in close contact with the end bracket.
Claim 18
Dependent Claim
84 words
The fan apparatus claimed in claim 11, wherein each clamping member has an adhering portion to adhere to an inner surface of the end bracket and a pressing portion having a V-shaped protuberance to press the circuit board toward the end bracket, and the adhering portion is inserted in the end bracket through a notch provided on the end bracket to adhere to the inner surface of the end bracket and the V-shaped protuberance is fitted in a hole bored in the circuit board.
Claim 19
Dependent Claim
25 words
A fan apparatus as claimed in claim 11, wherein the number of the clamping members is, smaller than the number of the heat generation elements.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-20 | 1995-07-22 | 1996-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-20 | 1999-07-22 | 2000-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-20 | 2003-07-22 | 2004-01-21 | $7700.00 | Window Closed / Lapsed |