US4504098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic bearing for high temperature environment
Assignee: STYLED EUROPEENE DE PROPULSION A Co OF FRANCE SA Ste
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Filing: 1983-11-04
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Granted: 1985-03-12
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Expires: 2003-11-04
Abstract
Abstract Electromagnetic bearing within a high temperature environment. The bearing comprises electromagnets, each one constituted by at least one coil made of conductors, and one armature in ferromagnetic material. Each coil is produced by weaving and comprises a warp constituted from at least one insulated conducting wire and a weft constituted from a strip of insulating material, the whole coil assembly being thereafter molded in a high temperature cement.
Inventors
- 👤 Andre P. Battarel
- 👤 Claude G. Lequin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:06
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/04; F16C32/0406; F16C32/044; F16C32/0459; F16C32/0461; F16C32/0465; H; H02; H02K; H02K7/00; H02K7/08; H02K7/09; F16C2360/00; F16C2360/44
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
99 words
Electromagnetic bearing for a high temperature environment, comprising stator means and rotor means, said stator means including at least one electromagnet having a ferromagnetic stationary yoke and a coil assembly attached thereto, said coil assembly comprising at least one coil wound on said stationary yoke and said rotor means including an annular ferromagnetic rotor armature, wherein each said coil comprises at least one insulated conducting wire defining a warp and an interwoven strip of insulating material defining a weft and wherein the insulated conducting wire and the interwoven strip of insulating material are embedded in a high temperature cement.
Claim 2
Dependent Claim
99 words
Electromagnetic bearing for a high temperature environment, comprising stator means and rotor means, said stator means including at least one electromagnet having a ferromagnetic stationary yoke and a coil assembly attached thereto, said coil assembly comprising at least one coil wound on said stationary yoke and said rotor means including an annular ferromagnetic rotor armature, wherein each said coil comprises at least one insulated conducting wire defining a warp and an interwoven strip of insulating material defining a weft and wherein the insulated conducting wire and the interwoven strip of insulating material are embedded in a high temperature cement.
Claim 3
Dependent Claim
24 words
Electromagnetic bearing as claimed in claim 1, wherein the insulated conducting wire is constituted by a nickel-plated copper wire insulated by a ceramic layer.
Claim 4
Dependent Claim
18 words
Electromagnetic bearing as claimed in claim 1, wherein the strip of insulating material is constituted by glass-fiber tubing.
Claim 5
Dependent Claim
23 words
Electromagnetic bearing as claimed in claim 1, wherein said insulated wire comprises a conducting core, having a diameter less than about 1 mm.
Claim 6
Dependent Claim
31 words
Electromagnetic bearing as claimed in claim 1, wherein said strip of insulating material has a thickness of a few tenths of a millimeter, and a width of about a few millimeters.
Claim 7
Dependent Claim
29 words
Electromagnetic bearing as claimed in claim 1, wherein blotter-forming ceramic is provided over the side parts of the coil, between the ends of the weft strips of insulating material.
Claim 8
Dependent Claim
34 words
Electromagnetic bearing as claimed in claim 2, wherein said nickel-plated copper wire insulated by a ceramic layer comprises an additional outer coating of varnish to prevent the ceramic layer from becoming detached during winding.
Claim 9
Dependent Claim
35 words
Electromagnetic bearing as claimed in claim 1, wherein interstices are provided between the warp insulating conducting wire and the interwoven weft strip of insulating material and said interstices are filled with said high temperature cement.
Claim 10
Dependent Claim
37 words
Electromagnetic bearing as claimed in claim 1, wherein each coil comprises a plurality of insulated conducting wires grouped together and connected in parallel, and a strip of insulating material interwoven with said plurality of insulated conducting wires.
Claim 11
Dependent Claim
19 words
Electromagnetic bearing as claimed in claim 1, wherein blotter-forming glass-wool is provided over the side parts of the coil.
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) | 1988-03-11 | 1988-09-10 | 1989-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-11 | 1992-09-10 | 1993-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-11 | 1996-09-10 | 1997-03-12 | $7700.00 | Window Closed / Lapsed |