US3712426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic friction brake
Assignee: Individual
•
Filing: 1971-01-20
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Granted: 1973-01-23
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Expires: 1991-01-20
Abstract
Abstract An electromagnetic brake includes a pair of spaced apart parallel E-shaped laminated electromagnetic bodies in the recesses of which there is disposed an exciter coil. The electromagnetic bodies and the coil are potted in plastic. The plastic forms a flat planar surface flush with the pole faces of the electromagnetic bodies to serve as a friction surface which brakes a friction disc keyed to a shaft to be braked.
Inventors
- 👤 D Gilbrech
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:25
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/14; F16D2121/00; F16D2121/18; F16D2121/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
122 words
An electromagnetic brake for a rotatable shaft comprising: an exciter coil; an electromagnetic means having recesses for receiving said exciter coil and further having coplanar flat pole places; said electromagnetic means being in the form of a pair of magnetic bodies of generally E-shaped laminations, said exciter coil being in the recesses thereof; insulating material encapsulating said exciter coil and insulating same from said electromagnetic means; said insulating material effecting a flat friction surface substantially flush with said friction plane; a magnetically sensitive friction disc fastened to said shaft and rotatably juxtaposed to said friction surface; and means for electrically energizing said exciter coil whereby the magnetic field of said body draws said disc onto said friction plane to brake said shaft.
Claim 2
Dependent Claim
122 words
An electromagnetic brake for a rotatable shaft comprising: an exciter coil; an electromagnetic means having recesses for receiving said exciter coil and further having coplanar flat pole places; said electromagnetic means being in the form of a pair of magnetic bodies of generally E-shaped laminations, said exciter coil being in the recesses thereof; insulating material encapsulating said exciter coil and insulating same from said electromagnetic means; said insulating material effecting a flat friction surface substantially flush with said friction plane; a magnetically sensitive friction disc fastened to said shaft and rotatably juxtaposed to said friction surface; and means for electrically energizing said exciter coil whereby the magnetic field of said body draws said disc onto said friction plane to brake said shaft.
Claim 3
Dependent Claim
22 words
A brake as in claim 1 wherein said insulating means is plastic compound potted around and onto said coil and electromagnetic bodies.
Claim 4
Dependent Claim
20 words
A brake as in claim 1 wherein said insulating material has a central axial opening through which said shaft passes.
Claim 5
Dependent Claim
19 words
A brake as in claim 1 wherein said disc is fastened to said shaft by means of cross pins.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |