US4827170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric generator for use in turbocharger
Assignee: Isuzu Motors Ltd
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Filing: 1987-04-21
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Granted: 1989-05-02
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Expires: 2007-04-21
Abstract
Abstract An electric generator for use in a turbocharger includes a rotor mounted on the rotational shaft of the turbocharger and comprising a single permanent magnet fitted in an outer cylindrical sleeve which prevents the rotor from breakage upon high-speed rotaiton thereof. The rotor also includes heat insulation between the permanent magnet and the rotational shaft. The heat insulation portion may be an air gap or a heat insulating member.
Inventors
- 👤 Hideo Kawamura
- 👤 Katsuyuki Tamai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:45
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/12; H02K1/17; H02K1/22; H02K1/28; F; F01; F01D; F01D15/00; F01D15/10; H02K1/27; H02K1/2706; H02K1/272; H02K1/2726; H02K1/2733; H02K7/00; H02K7/18; H02K7/1807; H02K7/1823; F01N; F01N5/00; F01N5/04; F02; F02B; F02B37/00; F02B37/02; F02B37/025; F05; F05D; F05D2220/00; F05D2220/40
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
115 words
A rotor for an electric generator for use on a rotational shaft of a turbocharger which can be driven by the exhaust energy discharged by an internal combustion engine, comprising: a single permanent magnet positioned about the rotational shaft; an outer cylindrical sleeve positioned about said permanent magnet so that said permanent magnet is force-fitted in said outer cylindrical sleeve, said permanent magnet comprising a material having a high tensile strength; side plates respectively positioned on opposing sides of said permanent magnet and attached to said outer cylindrical sleeve so as to fix said outer cylindrical sleeve to the rotational shaft; and a heat insulating portion disposed between the rotational shaft and said permanent magnet.
Claim 2
Dependent Claim
115 words
A rotor for an electric generator for use on a rotational shaft of a turbocharger which can be driven by the exhaust energy discharged by an internal combustion engine, comprising: a single permanent magnet positioned about the rotational shaft; an outer cylindrical sleeve positioned about said permanent magnet so that said permanent magnet is force-fitted in said outer cylindrical sleeve, said permanent magnet comprising a material having a high tensile strength; side plates respectively positioned on opposing sides of said permanent magnet and attached to said outer cylindrical sleeve so as to fix said outer cylindrical sleeve to the rotational shaft; and a heat insulating portion disposed between the rotational shaft and said permanent magnet.
Claim 3
Dependent Claim
19 words
A rotor for an electric generator according to claim 1, wherein said heat insulating portion comprises an air gap.
Claim 4
Dependent Claim
20 words
A rotor for an electric generator according to claim 1, wherein said heat insulating portion comprises a heat insulating member.
Claim 5
Dependent Claim
21 words
A rotor for an electric generator according to claim 1, wherein said outer cylindrical sleeve is made of a titanium alloy.
Claim 6
Dependent Claim
25 words
A rotor for an electric generator according to claim 1, further comprising: heat insulating plates respectively disposed between said side plates and said permanent magnet.
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) | 1992-05-01 | 1992-10-31 | 1993-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-01 | 1996-10-31 | 1997-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-01 | 2000-10-31 | 2001-05-02 | $7700.00 | Window Closed / Lapsed |