US3821571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flywheel magneto
Assignee: Mitsubishi Electric Corp
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Filing: 1973-08-20
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Granted: 1974-06-28
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Expires: 1993-08-20
Abstract
Abstract A flywheel magneto having one or more magnetic block assemblies composed of arc-shaped poles, ferrite magnets and substantially Z-shaped yokes, the component parts being appropriately secured to each other through thermosettable adhesive resin. The magnetic block assemblies are placed in a furnace for curing the resin, after which they are secured to the inner peripheral surface of a cylindrical flywheel of the magneto. The output capacities of the magnetos may be predetermined by the number of magnetic blocks utilized, as well as the particular materials employed and relative placement of the component parts.
Inventors
- 👤 Y Honsho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:27
CPC Classifications
F; F02; F02P; F02P1/00; F02P1/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
155 words
A flywheel magneto comprising: a cylindrical flywheel; a yoke adhered to the cylindrical inner surface of said flywheel, said yoke having a substantially Z-shaped configuration in cross-section and being formed of an arc pole of a predetermined radius of curvature, an arc-shaped portion of a radius of curvature greater than that of said arc pole, and a radially extending arm integrally joining the ends of said arc pole and said arc-shaped portion for connecting the same; a ferrite magnet adhered to said arc-shaped portion of said yoke; an arc-shaped pole adhered to said ferrite magnet and positioned adjacent said arc pole; a stator core in said flywheel facing said arc-shaped pole and said arc pole and spaced therefrom a predetermined distance; and wherein said arc-shaped pole is adhered to said ferrite magnet and said ferrite magnet is adhered to said yoke with a thermosettable adhesive resin, and said yoke is non-adhesively secured to said flywheel.
Claim 2
Dependent Claim
155 words
A flywheel magneto comprising: a cylindrical flywheel; a yoke adhered to the cylindrical inner surface of said flywheel, said yoke having a substantially Z-shaped configuration in cross-section and being formed of an arc pole of a predetermined radius of curvature, an arc-shaped portion of a radius of curvature greater than that of said arc pole, and a radially extending arm integrally joining the ends of said arc pole and said arc-shaped portion for connecting the same; a ferrite magnet adhered to said arc-shaped portion of said yoke; an arc-shaped pole adhered to said ferrite magnet and positioned adjacent said arc pole; a stator core in said flywheel facing said arc-shaped pole and said arc pole and spaced therefrom a predetermined distance; and wherein said arc-shaped pole is adhered to said ferrite magnet and said ferrite magnet is adhered to said yoke with a thermosettable adhesive resin, and said yoke is non-adhesively secured to said flywheel.
Claim 3
Dependent Claim
24 words
A flywheel magneto as set forth in claim 1, wherein said yoke, said ferrite magnet, and said arc-shaped pole form a magnetic block assembly.
Claim 4
Dependent Claim
36 words
A flywheel magneto as set forth in claim 2, wherein two magnetic block assemblies are adhered to said flywheel, with said arc poles of said yokes and said arc-shaped poles being alternately arranged and equally spaced.
Claim 5
Dependent Claim
30 words
A flywheel magneto as set forth in claim 2, wherein said stator case comprises a flat base portion and three legs depending from the same side thereof in parallel relation.
Claim 6
Dependent Claim
33 words
A flywheel magneto as set forth in claim 4, wherein the spacing between the legs of said stator core is substantially equal to the spacing between said arc pole and said arc-shaped poles.
Claim 7
Dependent Claim
17 words
A flywheel magneto as set forth in claim 5, wherein said flywheel is made of magnetic material.
Claim 8
Dependent Claim
17 words
A flywheel magneto as set forth in claim 4, wherein said flywheel is made of non-magnetic material.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |