Patent US3555330A successfully refreshed from Google Patents.
US3555330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single-phase ac non-commutator electric motor
Assignee: Individual
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Filing: 1968-09-04
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Granted: 1971-01-12
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Expires: 1988-09-04
Abstract
Abstract A motor with two sets of concentric poles with a rotor therebetween. One set of poles generates AC flux and the other DC flux. The rotor is a hollow cylinder, with AC and DC windings thereon connected by rectifiers. Current generated in the AC windings is rectified and passed to the DC windings for reaction with the DC flux to generate a torque in the rotor.
Inventors
- 👤 David Veniaminovich Svecharnik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:03
CPC Classifications
H; H02; H02K; H02K99/00; H02K99/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
115 words
A motor comprising spaced sources of flux defining a space therebetween, the sources being respectively sources of AC and DC flux, a rotor between said sources, AC and DC windings on the rotor operatively disposed with respect to the corresponding source, and rectifier means coupling said windings, the AC winding operating with the source of AC flux to generate an AC current which is rectified by said rectifier means and passed to said DC winding as a DC current which cooperates with the source of DC flux to generate a torque on said rotor, said rotor being a hollow symmetrical body of rotation having inner and outer surfaces on which said windings are separately mounted.
Claim 2
Dependent Claim
115 words
A motor comprising spaced sources of flux defining a space therebetween, the sources being respectively sources of AC and DC flux, a rotor between said sources, AC and DC windings on the rotor operatively disposed with respect to the corresponding source, and rectifier means coupling said windings, the AC winding operating with the source of AC flux to generate an AC current which is rectified by said rectifier means and passed to said DC winding as a DC current which cooperates with the source of DC flux to generate a torque on said rotor, said rotor being a hollow symmetrical body of rotation having inner and outer surfaces on which said windings are separately mounted.
Claim 3
Dependent Claim
20 words
A motor as claimed in claim 1 wherein the sources are concentric and spaced and define an annular space therebetween.
Claim 4
Dependent Claim
15 words
A motor as claimed in claim 1 wherein said body of rotation is a cylinder.
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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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |