Patent US3602749A successfully refreshed from Google Patents.
US3602749A
Expired / Lapsed
US
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Dynamoelectric machine
Assignee: Individual
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Filing: 1970-02-20
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Granted: 1971-08-31
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Expires: 1990-02-20
Abstract
Abstract A dynamoelectric machine capable of operating in a motor mode or in a generator mode and having coaxial inner and outer stators and a pair of end stators with each stator being provided preferably with magnetic flux producing permanent magnets. The rotor is disposed in the magnetic gap between the inner and outer stators and the end stators and comprises a plurality of radially disposed coils, wound magnetic cores and intermediary coilless magnetic cores disposed between consecutive coil wound cores.
Inventors
- 👤 Ernie B Esters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:51
CPC Classifications
H; H02; H02K; H02K23/00; H02K23/02; H02K23/04; H02K21/00; H02K21/26
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
224 words
In a dynamoelectric machine having a rotatably mounted shaft and a rotor for rotation in unison with said shaft, the combination comprising: support means mounted on said shaft for rotation therewith; a plurality of magnetically permeable cores mounted on said support means; a plurality of electrical coil windings each wound around every other magnetically permeable core and electrically connected such that an electric current circulating therethrough causes magnetic fields all directed in the same direction in said every other core and a magnetic field directed in an opposite direction in every one of the remaining cores; a frame having end plates, said shaft being journaled in said end plates; a plurality of permanent magnets forming an outer stator mounted on said frame and forming radially directed magnetic fields, the direction of each magnetic field being radially opposite to the direction of the magnetic field contiguous therewith; at least one inner stator support member affixed to one of said end plates coaxially to said rotor; and a plurality of permanent magnets mounted on said inner stator support member and forming radially directed magnetic fields, the direction of each magnetic field contiguous therewith, each magnetic field formed by the inner stator magnets being radially aligned and radially opposite in direction to a magnetic field formed by the outer stator magnets and forming therebetween a magnetic gap.
Claim 2
Dependent Claim
224 words
In a dynamoelectric machine having a rotatably mounted shaft and a rotor for rotation in unison with said shaft, the combination comprising: support means mounted on said shaft for rotation therewith; a plurality of magnetically permeable cores mounted on said support means; a plurality of electrical coil windings each wound around every other magnetically permeable core and electrically connected such that an electric current circulating therethrough causes magnetic fields all directed in the same direction in said every other core and a magnetic field directed in an opposite direction in every one of the remaining cores; a frame having end plates, said shaft being journaled in said end plates; a plurality of permanent magnets forming an outer stator mounted on said frame and forming radially directed magnetic fields, the direction of each magnetic field being radially opposite to the direction of the magnetic field contiguous therewith; at least one inner stator support member affixed to one of said end plates coaxially to said rotor; and a plurality of permanent magnets mounted on said inner stator support member and forming radially directed magnetic fields, the direction of each magnetic field contiguous therewith, each magnetic field formed by the inner stator magnets being radially aligned and radially opposite in direction to a magnetic field formed by the outer stator magnets and forming therebetween a magnetic gap.
Claim 3
Dependent Claim
28 words
The combination of claim 1, wherein each of said cores is an elongated flat member having its axis of elongation substantially parallel to the axis of said shaft.
Claim 4
Dependent Claim
31 words
The combination of claim 2, wherein each of said coil windings is wound around its appropriate core with turns of wires in planes substantially parallel to the axis of said shaft.
Claim 5
Dependent Claim
104 words
In the dynamoelectric machine of claim 1, the combination further comprising: commutation means comprising a pair of commutation rings affixed to said shaft for rotation therewith; a first common line electrically connected to one of said rings and a second common line electrically connected to the second of said rings; means electrically connecting said electrical windings across said common lines such that the electrical current flowing in each of said electrical windings is periodically reversed during passage through each magnetic gap; and a pair of brushes, one of which is adapted to engage one of said rings whilst the other engages the other ring.
Claim 6
Dependent Claim
23 words
In the dynamoelectric machine of claim 1, the combination wherein said inner stator magnets and said outer stator magnets are horseshoe shaped magnets.
Claim 7
Dependent Claim
34 words
In the dynamoelectric machine of claim 4, the combination wherein said electrical windings are electrically connected across said first and second common lines such that current flows through said winding in the same direction.
Claim 8
Dependent Claim
39 words
In the dynamoelectric machine of claim 1, the combination wherein said inner and outer stators include elongated magnets having horseshoe shaped transverse cross sections, each of said elongated magnets having its axis of elongation substantially parallel to said shaft.
Claim 9
Dependent Claim
30 words
In the dynamoelectric machine of claim 1, the combination further comprising a plurality of permanent magnets forming end stators mounted on each end plate and having axially directed magnetic fields.
Claim 10
Dependent Claim
72 words
In the dynamoelectric machine of claim 8, the combination wherein each end stator includes a plurality of Horseshoe shaped permanent magnets, each end stator magnet has one of its legs disposed immediately adjacent the end of one of the outer stator magnets and is of the same polarity thereof and the other leg disposed immediately adjacent the end of one of the inner stator magnets and is of the same polarity thereof.
Claim 11
Dependent Claim
118 words
In the dynamoelectric machine of claim 4, the combination wherein: each of said commutation rings includes a plurality of brush engaging strips, the number of strips in one commutation ring being equal to the number of strips in the other ring and to the number of radially aligned pairs of magnetic fields; said first common line is electrically connected to a group of alternate strips of both commutation rings and said second common line is electrically connected to a second group of alternate strips of both commutation rings; and said electrical connecting means connects said electrical windings across said common lines such that the direction of electrical current flow in each of said electrical windings is the same.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |