Patent US3564311A successfully refreshed from Google Patents.
US3564311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetical disclike constructed eddy current brake
Assignee: Individual
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Filing: 1968-11-14
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Granted: 1971-02-16
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Expires: 1988-11-14
Abstract
Abstract A flat rotor to be braked is formed with aligned inner and outer spokes spaced by a coaxial nonmagnetic ring which rotor is located between two stationary conductive discs in which are seated coaxial coils opposite said ring. Direct current is supplied to the coils to induce eddy currents in the conductive discs for braking.
Inventors
- 👤 Hartwig Beyersdorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:51
CPC Classifications
H; H02; H02K; H02K49/00; H02K49/02; H02K49/04; H02K49/046
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
140 words
A dynamoelectric disc-type eddy current brake, including a pair of relatively stationary, axially spaced apart discs with plane radial faces and formed of magnetic material, a rotor disc with radial faces arranged between said stationary discs, a pair of circular field coils for magnetically exciting said stationary and rotor discs arranged to divide each of said radial faces of said stationary discs into two radially spaced apart areas in which eddy currents are induced, and means for supplying a direct current to said field exciting coils, said rotor disc comprising a plurality of radially extending, circumferentially spaced apart spoke members of magnetic material and an annular ring member of nonmagnetic material and of a diameter approximately equal to the diameter of said field exciting coils arranged to divide each of said spoke members into two radially spaced apart spoke parts.
Claim 2
Dependent Claim
140 words
A dynamoelectric disc-type eddy current brake, including a pair of relatively stationary, axially spaced apart discs with plane radial faces and formed of magnetic material, a rotor disc with radial faces arranged between said stationary discs, a pair of circular field coils for magnetically exciting said stationary and rotor discs arranged to divide each of said radial faces of said stationary discs into two radially spaced apart areas in which eddy currents are induced, and means for supplying a direct current to said field exciting coils, said rotor disc comprising a plurality of radially extending, circumferentially spaced apart spoke members of magnetic material and an annular ring member of nonmagnetic material and of a diameter approximately equal to the diameter of said field exciting coils arranged to divide each of said spoke members into two radially spaced apart spoke parts.
Claim 3
Dependent Claim
42 words
A dynamoelectric disc type eddy current brake according to claim 1, further including a plurality of ventilation blades extending axially from either side of said ring member and extending radially between an inner and an outer one of said spoke parts each.
References Cited (Backward Citations)
US2487551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |