US4373147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torque compensated electric motor
Assignee: SPX Technologies Inc
•
Filing: 1981-07-23
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Granted: 1983-02-08
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Expires: 2001-07-23
Abstract
Abstract An electric motor having a first rotor on an output shaft, a first stator pivotally mounted to a housing, a second rotor mounted to the first stator and a second stator mounted to the housing. The second stator is driven with a control signal which is a function of the measure reaction torque experienced by the first stator to produce a counter torque to balance the reaction torque. A consistency transmitter mounted on the output shaft produces torque on the first stator as a function of the consistency of the material in which it is rotated.
Inventors
- 👤 William L. Carlson, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:00
CPC Classifications
G; G01; G01N; G01N11/00; G01N11/10; G01N11/14; H; H02; H02K; H02K16/00; H02K16/02; H02K16/025; H02K26/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
113 words
A torque compensated electric motor comprising: a housing; an output shaft extending from said housing; a first rotor mounted to said output shaft in said housing; a first stator rotatably mounted in said housing concentric to said first rotor; a second rotor mounted in said housing to said first stator for rotation therewith; a second stator mounted in said housing concentric to said second rotor; means for measuring the reaction torque experienced by said first stator; and control means for providing a control signal to said second stator as a function of said measured torque to produce a counter-torque in said second rotor to balance the reaction torque experienced by said first stator.
Claim 2
Dependent Claim
113 words
A torque compensated electric motor comprising: a housing; an output shaft extending from said housing; a first rotor mounted to said output shaft in said housing; a first stator rotatably mounted in said housing concentric to said first rotor; a second rotor mounted in said housing to said first stator for rotation therewith; a second stator mounted in said housing concentric to said second rotor; means for measuring the reaction torque experienced by said first stator; and control means for providing a control signal to said second stator as a function of said measured torque to produce a counter-torque in said second rotor to balance the reaction torque experienced by said first stator.
Claim 3
Dependent Claim
38 words
A torque compensated electric motor according to claim 1 wherein said measuring means measures the angular motion of said first stator and said control means provides said control signal to halt said angular motion of said first stator.
Claim 4
Dependent Claim
45 words
A torque compensated electric motor according to claim 1 wherein said measuring means includes a magnet and a Hall-effect transducer, one mounted to said first stator and the other to said housing, for measuring the angular displacement of the first stator relative to said housing.
Claim 5
Dependent Claim
42 words
A torque compensated electric motor according to claim 1 wherein said measuring means measures the angular displacement of said first stator from a predetermined position and said control means provides said control signal to maintain said first stator at said predetermined position.
Claim 6
Dependent Claim
20 words
A torque compensated electric motor according to claim 1 wherein said second rotor is displaced axially from said first stator.
Claim 7
Dependent Claim
19 words
A torque compensated electric motor according to claim 1 wherein said second rotor is concentric to said first stator.
Claim 8
Dependent Claim
28 words
A torque compensated electric motor according to claim 1 wherein said second rotor and stator have at least equal electric torque capacity as the first rotor and stator.
Claim 9
Dependent Claim
147 words
A rotary consistency transmitter comprising; a housing; an output shaft extending from said housing; a first rotor mounted to said output shaft in said housing; a first stator rotatably mounted in said housing concentric to said first rotor; a second rotor mounted in said housing to said first stator for rotation therewith; a second stator mounted in said housing concentric to said second rotor; means for measuring the reaction torque by said first stator; control means for providing a control signal to said second stator as a function of said measured torque to produce a counter-torque in said second rotor to balance the reaction torque experienced by said first stator; and transmitter means mounted to the end of said output shaft exterior said housing for producing a torque on said first stator as a function of the consistency of material in which said transducer means is rotated.
Claim 10
Dependent Claim
147 words
A rotary consistency transmitter comprising; a housing; an output shaft extending from said housing; a first rotor mounted to said output shaft in said housing; a first stator rotatably mounted in said housing concentric to said first rotor; a second rotor mounted in said housing to said first stator for rotation therewith; a second stator mounted in said housing concentric to said second rotor; means for measuring the reaction torque by said first stator; control means for providing a control signal to said second stator as a function of said measured torque to produce a counter-torque in said second rotor to balance the reaction torque experienced by said first stator; and transmitter means mounted to the end of said output shaft exterior said housing for producing a torque on said first stator as a function of the consistency of material in which said transducer means is rotated.
Claim 11
Dependent Claim
41 words
A rotary consistency transmitter according to claim 8 wherein said measuring means measures the angular displacement of said first stator from a predetermined position and said control means provides said control signal to maintain said first stator at said predetermined position.
Claim 12
Dependent Claim
19 words
A rotary consistency transmitter according to claim 8 wherein said second rotor is displaced axially from said first stator.
Claim 13
Dependent Claim
18 words
A rotary consistency transmitter according to claim 8 wherein said second rotor is concentric to said first stator.
Claim 14
Dependent Claim
27 words
A rotary consistency transmitter according to claim 8 wherein said second rotor and stator have at least equal electric torque capacity as the first rotor and stator.
Claim 15
Dependent Claim
38 words
A torque compensated electric motor according to claim 8 wherein said measuring means measures the angular motion of said first stator and said control means provides said control signal to halt said angular motion of said first state.
Claim 16
Dependent Claim
45 words
A torque compensated electric motor according to claim 8 wherein said measuring means includes a magnet and a Hall-effect transducer one mounted to said first stator and the other to said housing, for measuring the angular displacement of the first stator relative to said housing.
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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) | 1986-02-07 | 1986-08-09 | 1987-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-07 | 1990-08-09 | 1991-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-07 | 1994-08-09 | 1995-02-08 | $7700.00 | Window Closed / Lapsed |