Patent US374850A successfully refreshed from Google Patents.
Patent JPS5779049A successfully refreshed from Google Patents.
US3682017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced cylindrical coil for an electrical machine
Assignee: Maxon Motor AG
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Filing: 1971-02-19
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Granted: 1972-08-08
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Expires: 1991-02-19
Abstract
Abstract An ironless cylindrical coil-rotor for electrical machines which is balanced by attached weights is described. These weights consist of foil strips which are fastened to the surface of the turns of the coil-rotor and are at least partially embedded in the interspaces of the coil turns in order to achieve a flat structure of the balanced coil-rotor and a strong anchorage of the foil strips to the coil-rotor. The foil strips are made of a plastically deformable material.
Inventors
- 👤 Jurgen Mayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:13
CPC Classifications
H; H02; H02K; H02K7/00; H02K7/04; F; F16; F16F; F16F15/00; F16F15/32; F16F15/322; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49012; Y10T74/00; Y10T74/21; Y10T74/211
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
64 words
An ironless cylindrical coil-rotor for electrical machines and balanced by attached weights, wherein the weights consist of foil strips which are secured symmetrically to the determined unbalance position on at least one of the surfaces of the cylindrical coil and which are at least partially embedded in the interspaces of the coil turns, and wherein the foil strips are made of plastically deformable material.
Claim 2
Dependent Claim
64 words
An ironless cylindrical coil-rotor for electrical machines and balanced by attached weights, wherein the weights consist of foil strips which are secured symmetrically to the determined unbalance position on at least one of the surfaces of the cylindrical coil and which are at least partially embedded in the interspaces of the coil turns, and wherein the foil strips are made of plastically deformable material.
Claim 3
Dependent Claim
22 words
A cylindrical coil as claimed in claim 1, wherein the foil strips are applied to the inner surface of the cylindrical coil.
Claim 4
Dependent Claim
22 words
A cylindrical coil as claimed in claim 1, wherein the foil strips are coated on one of their surfaces with an adhesive.
Claim 5
Dependent Claim
23 words
A cylindrical coil according to claim 1, wherein the foil strips consist of a material of high specific weight and low electrical conductance.
Claim 6
Dependent Claim
74 words
An ironless cylindrical coil-rotor for electrical machines and balanced by attached weights, wherein said weights consist of foil plates of a material of high specific weight and low electrical conductance which are secured to the surface of the cylindrical coil such that the center of gravity of said foil strips coincides with a corresponding measured unbalance position and which are at least partially embedded in the interspaces of the turns of the cylindrical coil.
Claim 7
Dependent Claim
74 words
An ironless cylindrical coil-rotor for electrical machines and balanced by attached weights, wherein said weights consist of foil plates of a material of high specific weight and low electrical conductance which are secured to the surface of the cylindrical coil such that the center of gravity of said foil strips coincides with a corresponding measured unbalance position and which are at least partially embedded in the interspaces of the turns of the cylindrical coil.
Claim 8
Dependent Claim
15 words
A cylindrical coil according to claim 5, wherein the foil strips consist of plastic-bonded metal.
Claim 9
Dependent Claim
17 words
A cylindrical coil according to claim 5, wherein thE plastic component of the plastic-bonded metal is thermosetting.
Claim 10
Dependent Claim
15 words
A cylindrical coil as claimed in claim 5, wherein the foil strips consist of lead.
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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |