US3596119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric stepping motor
Assignee: Landis and Gyr AG
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Filing: 1969-11-13
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Granted: 1971-07-27
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Expires: 1989-11-13
Abstract
Abstract An electric stepping motor having a drive motor for rotating the motor shaft through 0- pi electrical degrees in response to an applied current pulse and an energy storage system connected to the motor shaft for opposing the rotation of the shaft through less than 0- pi electrical degrees and for assisting the rotation of the shaft through greater than pi -2 pi electrical degrees.
Inventors
- 👤 Herbert Goldmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:12
CPC Classifications
H; H02; H02K; H02K37/00; H02K37/10; H02K37/12; H02K37/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
117 words
A stepping motor comprising: a shaft; a drive motor operatively coupled to rotate said shaft a predetermined angular distance in response to an applied current pulse; and an energy storage system operatively coupled to said shaft including a magnetized rotor providing at least a pair of magnetic poles on the surface of said rotor, said poles being nonsymmetrically disposed so that the angular rotation of negative torque during which energy is stored is less than the angular rotation of positive torque during which energy is released, and a stator magnet so disposed so that only one of the poles of said stator magnet faces and interacts with the nonsymmetrical magnetic poles on the surface of said rotor.
Claim 2
Dependent Claim
117 words
A stepping motor comprising: a shaft; a drive motor operatively coupled to rotate said shaft a predetermined angular distance in response to an applied current pulse; and an energy storage system operatively coupled to said shaft including a magnetized rotor providing at least a pair of magnetic poles on the surface of said rotor, said poles being nonsymmetrically disposed so that the angular rotation of negative torque during which energy is stored is less than the angular rotation of positive torque during which energy is released, and a stator magnet so disposed so that only one of the poles of said stator magnet faces and interacts with the nonsymmetrical magnetic poles on the surface of said rotor.
Claim 3
Dependent Claim
98 words
A stepping motor comprising: a shaft; a drive motor operatively coupled to rotate said shaft a predetermined angular distance in response to an applied current pulse; and an energy storage system operatively connected to said shaft including a magnetized rotor providing at least a pair of magnetic poles on the surface of said rotor, said poles including interleaved north and south poles disposed laterally on said rotor surface, and a stator magnet so disposed so that only one of the poles of said stator magnet faces and interacts with the magnetic poles on the surface of said rotor.
Claim 4
Dependent Claim
98 words
A stepping motor comprising: a shaft; a drive motor operatively coupled to rotate said shaft a predetermined angular distance in response to an applied current pulse; and an energy storage system operatively connected to said shaft including a magnetized rotor providing at least a pair of magnetic poles on the surface of said rotor, said poles including interleaved north and south poles disposed laterally on said rotor surface, and a stator magnet so disposed so that only one of the poles of said stator magnet faces and interacts with the magnetic poles on the surface of said rotor.
Claim 5
Dependent Claim
19 words
A stepping motor according to claim 1 wherein the separation between said rotor and said stator magnet is adjustable.
Claim 6
Dependent Claim
15 words
A stepping motor according to claim 2 wherein said interleaved poles are triangular in shape.
Claim 7
Dependent Claim
48 words
A stepping motor according to claim 1 further including a housing of magnetic material surrounding said rotor and said stator magnet, and wherein the gap between said rotor and stator is small; and the pole of said stator magnet not facing said rotor is directed toward said housing.
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |