Patent US5621733A successfully refreshed from Google Patents.
Patent US3553510A successfully refreshed from Google Patents.
US3553510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor for permanent magnet alternator
Assignee: ZF International UK Ltd
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Filing: 1968-07-08
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Granted: 1971-01-05
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Expires: 1988-07-08
Abstract
Abstract A rotor for a permanent magnet alternator includes a pair of spaced magnetic claws, the claws having interdigitated fingers. A ferrite or other sintered magnet is supported between the claws with the fingers of the claws overlying the periphery of the magnet, and the magnet is formed in at least two parts which can move radially relative to the claws. A nonmagnetic band engages the periphery of the magnet to limit movement of the parts of the magnet.
Inventors
- 👤 Kenneth Clayton Howey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:01
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/27; H02K1/2706; H02K1/2713
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
76 words
A rotor for a permanent magnet alternator comprising, a pair of spaced magnetic claws, the claws having interdigitated fingers, a sintered magnet supported between the claws with the fingers overlaying the periphery of the magnet, the magnet being formed of at least two parts which may move radially relative to the claws, and the rotor further including a nonmagnetic band engaging the periphery of said magnetic parts to limit the radial movement of said magnetic parts.
Claim 2
Dependent Claim
76 words
A rotor for a permanent magnet alternator comprising, a pair of spaced magnetic claws, the claws having interdigitated fingers, a sintered magnet supported between the claws with the fingers overlaying the periphery of the magnet, the magnet being formed of at least two parts which may move radially relative to the claws, and the rotor further including a nonmagnetic band engaging the periphery of said magnetic parts to limit the radial movement of said magnetic parts.
Claim 3
Dependent Claim
27 words
A rotor as claimed in claim 1 wherein said band is split to permit expansion of the band as the parts of the magnet move radially outwardly.
Claim 4
Dependent Claim
14 words
A rotor as claimed in claim 1 wherein said band if formed from aluminum.
Claim 5
Dependent Claim
28 words
A rotor as claimed in claim 1 wherein said claws are annular and are interconnected by a nonmagnetic member which extends through the central holes in said claws.
Claim 6
Dependent Claim
54 words
A rotor is claimed in claim 4 wherein said nonmagnetic member is in the form of a sleeve and the rotor includes a rotor shaft which extends through said sleeve, said sleeve being nonrotatably mounted on said shaft and said shaft serving to mount the rotor for rotation about the axis of the shaft.
Claim 7
Dependent Claim
13 words
A rotor as claimed in claim 5 wherein said shaft carries a fan.
Claim 8
Dependent Claim
24 words
A rotor as claimed in claim further including means whereby the rotor can be mounted on the flywheel of an engine for rotation therewith.
Claim 9
Dependent Claim
26 words
A rotor as claimed in claim 7 therein said means includes at least one nonmagnetic bolt which extends through said rotor into engagement with the flywheel.
Claim 10
Dependent Claim
20 words
A rotor as claimed in claim 8 wherein said bolt passes through a rubber bush interposed between adjacent magnet parts.
References Cited (Backward Citations)
GB189917210A
Cited
US2134795A
Cited
US3230405A
Cited
US3088044A
Cited
US3271606A
Cited
US3305740A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |