Patent US4219752A successfully refreshed from Google Patents.
US4219752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor for a magneto generator
Assignee: Denso Corp
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Filing: 1978-06-19
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Granted: 1980-08-26
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Expires: 1998-06-19
Abstract
Abstract A rotor for a magneto generator including a plurality of permanently magnetized magnets radially disposed in the inner peripheral surface of an iron cup-shaped flywheel. The rotor has a ring-shaped magnet case formed with a plurality of magnet mounting portions for accommodating the magnets and has a plurality of wedge mounting portions provided between the magnet mounting portions for accommodating a plurality of wedges adapted to press and hold the magnets in place.
Inventors
- 👤 Aritsune Katou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:10
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/28; H02K1/27; H02K1/2786; H02K1/2787; H02K1/2789; H02K1/2791
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
118 words
A rotor for a magnet generator comprising: a cup-shaped magnetic member, a plurality of arcuate permanent magnet members each having abutting surfaces at both its ends, a ring-shaped nonmagnetic case disposed in said cup-shaped magnetic member, said case having a plurality of resilient dovetailed columnar members for securing said magnet members in said case between adjacent columnar members positioned at the abutting surfaces of said magnet, at least one of said columnar members having therein a wedge mounting slot, and a ring-shaped nonmagnetic wedge member supporting at least one wedge which is inserted into said wedge mounting slot to expand said mounting slot thereby pressing the corresponding dovetailed columnar member against the abutting surfaces located adjacent said member.
Claim 2
Dependent Claim
118 words
A rotor for a magnet generator comprising: a cup-shaped magnetic member, a plurality of arcuate permanent magnet members each having abutting surfaces at both its ends, a ring-shaped nonmagnetic case disposed in said cup-shaped magnetic member, said case having a plurality of resilient dovetailed columnar members for securing said magnet members in said case between adjacent columnar members positioned at the abutting surfaces of said magnet, at least one of said columnar members having therein a wedge mounting slot, and a ring-shaped nonmagnetic wedge member supporting at least one wedge which is inserted into said wedge mounting slot to expand said mounting slot thereby pressing the corresponding dovetailed columnar member against the abutting surfaces located adjacent said member.
Claim 3
Dependent Claim
35 words
A rotor according to claim 1, wherein each of said dovetailed columnar members has a projection which is received within an abutting surface of an adjacent magnet member for preventing movement of said magnet members.
Claim 4
Dependent Claim
18 words
A rotor according to claim 1, wherein said magnet member comprises a permanent magnet and a pole core.
Claim 5
Dependent Claim
27 words
A rotor according to claim 1, wherein the abutting surfaces of each magnet member extend beyond a circle defined by inner peripheral surfaces of said magnet members.
Claim 6
Dependent Claim
33 words
A rotor according to claim 1, wherein said dovetailed columnar member having a wedge mounting slot is provided with an opening for broadening the member when said wedge is inserted into said slot.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-26 | 1984-02-25 | 1984-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-26 | 1988-02-25 | 1988-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-26 | 1992-02-25 | 1992-08-26 | $7700.00 | Window Closed / Lapsed |