US4686397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brush and commutator segment torquer motor
Assignee: United States Department of the Air Force
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Filing: 1986-09-03
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Granted: 1987-08-11
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Expires: 2006-09-03
Abstract
Abstract A non-continuous brush and commutator segment torquer motor having a single radial air gap. The motor can be placed on the opposite side of the gimbal center line of a payload. This arrangement minimizes torquer mass, as well as providing greater clearance for the gimbal payload to travel through larger angular excursions. Hence, all payloads which are gimbal mounted, such as radar antennas, can be located closer to the gimbal center and can be driven through larger look angles.
Inventors
- 👤 Jack W. Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:21
CPC Classifications
H; H02; H02K; H02K26/00; H02K13/00; H02K13/006; H02K41/00; H02K41/02; H02K41/035; H02K5/00; H02K5/04; H02K5/14; H02K5/143; H02K5/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A brush and commutator segment torquer motor comprising: an electromagnetically cooperating stator and rotor, said stator and rotor each defining less than 360° segments, respectively, said rotor being disposed on the outside of said stator and including a multiplicity of commutator bars at the inner surface thereof, said commutator bars lying along the plane of curvature of said rotor, said stator having a rare earth permanent magnet field and a brush block assembly including brushes at the outer surface thereof, said brushes contacting said commutator bars at said inner surface, and only a single air gap being radially disposed between said inner surface of said rotor and said outer surface of said stator.
Claim 2
Dependent Claim
113 words
A brush and commutator segment torquer motor comprising: an electromagnetically cooperating stator and rotor, said stator and rotor each defining less than 360° segments, respectively, said rotor being disposed on the outside of said stator and including a multiplicity of commutator bars at the inner surface thereof, said commutator bars lying along the plane of curvature of said rotor, said stator having a rare earth permanent magnet field and a brush block assembly including brushes at the outer surface thereof, said brushes contacting said commutator bars at said inner surface, and only a single air gap being radially disposed between said inner surface of said rotor and said outer surface of said stator.
References Cited (Backward Citations)
FR428724A
Cited
US2814743A
Cited
US3070733A
Cited
US3130591A
Cited
US3327541A
Cited
US3813566A
Cited
US4079400A
Cited
US4036453A
Cited
US4104787A
Cited
US4250416A
Cited
US4398167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-10 | 1991-02-09 | 1991-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-10 | 1995-02-09 | 1995-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-10 | 1999-02-09 | 1999-08-11 | $7700.00 | Window Closed / Lapsed |