Patent US4565938A successfully refreshed from Google Patents.
US4565938A
Expired / Lapsed
US
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Permanent magnet rotor toroidal generator and motor
Assignee: INTRA-TECHNOLOGY ASSOCIATES Inc A CORP OF PA
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Filing: 1984-07-09
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Granted: 1986-01-21
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Expires: 2004-07-09
Abstract
Abstract An electromechanical device which can be used as a motor or as a generator. The device has a housing, including bearing means to support a rotatable shaft. Disc magnet means are provided, and poled to have alternating polarity and are mounted on the shaft to define a rotor. The device includes at least one first pole shoe in contact with the magnet means, having a portion extending radially therefrom to define a virtual pole chamber, of a first polarity. Also included is at least one second pole shoe in contact with the magnet and having a portion extending radially therefrom to define a virtual pole chamber of the other polarity. A toroid stator is mounted on the housing and has windings thereon. The stator is positioned annularly around the disc magnets such that the virtual pole chambers of the first and second pole shoes surround portions of said windings with circumferentially alternating fields of alternating polarity. Means are provided for electrical contact with the stator to draw off current when the device is operated as a generator, or provide current to operate the device as a motor.
Inventors
- 👤 Moharram M. Fawzy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:15
CPC Classifications
H; H02; H02K; H02K21/00; H02K21/12; H02K21/125; H02K2201/00; H02K2201/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
122 words
An electromechanical device, comprising: a housing, including bearing means supporting a rotatable shaft; a magnetized disc magnet means; at least one first pole shoe positioned to contact said magnet means at a first polarity and having portions extending radially outward to define a pair of virtual pole chambers of said first polarity; at least one second pole shoe positioned to contact said magnet means at a second polarity and having portions extending radially outward to define a pair of virtual pole chambers of said second polarity; a toroid stator mounted on said housing and having windings thereon, said stator being positioned annularly around said disc magnet means such that the virtual poles surround portions of said windings with alternating fields of polarity.
Claim 2
Dependent Claim
122 words
An electromechanical device, comprising: a housing, including bearing means supporting a rotatable shaft; a magnetized disc magnet means; at least one first pole shoe positioned to contact said magnet means at a first polarity and having portions extending radially outward to define a pair of virtual pole chambers of said first polarity; at least one second pole shoe positioned to contact said magnet means at a second polarity and having portions extending radially outward to define a pair of virtual pole chambers of said second polarity; a toroid stator mounted on said housing and having windings thereon, said stator being positioned annularly around said disc magnet means such that the virtual poles surround portions of said windings with alternating fields of polarity.
Claim 3
Dependent Claim
34 words
The device of claim 1 which includes at least two first pole shoes and at least two pair of second pole shoes positioned to surround said toroid with virtual pole chambers of alternating polarity.
Claim 4
Dependent Claim
64 words
The device of claim 1 wherein said disc magnet means includes a pair of disc magnets facing each other with a first polarity, and said first pole shoe has a flat portion covering the first polarity face of said disc magnets and a pair of cup portions extending radially from the periphery of said face to define a chamber sized to accept said toroid.
Claim 5
Dependent Claim
45 words
The device of claim 3 wherein said second pole shoe has a flat portion covering second polarity face of said disc magnets and a pair of cup portions extending radially from the periphery of said face to define a chamber sized to accept said toroid.
Claim 6
Dependent Claim
33 words
The device of claim 4 wherein the length of active winding on said toroid adjacent the cup portions is substantially all of the total winding length, exclusive of allowance for mounting said toroid.
Claim 7
Dependent Claim
20 words
The device of claim 1 wherein said disc magnet means includes a single disc magnet having faces with opposite polarities.
Claim 8
Dependent Claim
27 words
The device of claim 1, wherein said toroid stator includes mounting means attached to the face of said stator and to the opposing face of said housing.
Claim 9
Dependent Claim
35 words
The device of claim 7, wherein said first pole shoe has a pair of cup portions extending radially from the periphery of said disc magnet means to define a chamber sized to accept said toroid.
Claim 10
Dependent Claim
25 words
The device of claim 8, wherein said cup portions include closure means for substantially enclosing said stator, exclusive of allowance for said stator mounting means.
Claim 11
Dependent Claim
35 words
The device of claim 7, wherein said second pole shoe has a pair of cup portions extending radially from the periphery of said disc magnet means to define a chamber sized to accept said toroid.
Claim 12
Dependent Claim
25 words
The device of claim 10, wherein said cup portions include closure means for substantially enclosing said stator, exclusive of allowance for said stator mounting means.
Claim 13
Dependent Claim
21 words
The device of claim 1 wherein said disc magnet means includes a single disc magnet having faces with circumferentially alternating polarities.
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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) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |