Patent FR2562291A1 successfully refreshed from Google Patents.
US4779905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forcedly air-cooled engine generator of vertical shaft type
Assignee: Kubota Corp
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Filing: 1987-08-25
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Granted: 1988-10-25
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Expires: 2007-08-25
Abstract
Abstract In an engine generator having a work generator arranged at the upper side of an engine of a vertical crank shaft type, the output shaft of the engine projects upwards from the engine crank case so as to be connected to the rotor of the work generator. And the stator is arranged so as to encircle the rotor and to be encircled by an air induction casing. A cooling fan of a centrifugal blower type is located at the upper end of the rotor shaft with the blades thereof directed to the side of the generator so as to supply a cooling air flowing upwards to both the interior and the exterior of the stator during operation.
Inventors
- 👤 Ryoichi Ito
- 👤 Kenji Ueno
- 👤 Tutomu Wada
- 👤 Osamu Murakami
- 👤 Shigeru Kawabata
- 👤 Kazuo Higo
- 👤 Akiyoshi Morikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:23
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/16; F02B63/00; F02B63/04; F02B75/007; F02B63/044; F02B2063/045
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
158 words
A forced air-cooled engine generator comprising: a vertical shaft type generator having a central rotor and a stator surrounding the rotor, an air-cooled engine having an output shaft disposed below said generator having a vertical crank shaft coupled to the output shaft and a crankcase, the crank shaft extending upwardly through the crankcase coaxially with said rotor and coupled thereto in driving engagement, a centrifugal-type cooling fan disposed above the generator rotor, coaxially and coupled in driving engagement with the crank shaft and extending outwardly over the generator stator; and an air induction casing surrounding said generator and at least the portion of said engine, said casing defining an air inlet surrounding said engine and an outlet adjacent said fan whereby said fan will draw cooling air into said casing, around said engine, upwardly through and around the stator and will expel said heated cooling air through the outlet without permitting the same to recirculate within said casing.
Claim 2
Dependent Claim
158 words
A forced air-cooled engine generator comprising: a vertical shaft type generator having a central rotor and a stator surrounding the rotor, an air-cooled engine having an output shaft disposed below said generator having a vertical crank shaft coupled to the output shaft and a crankcase, the crank shaft extending upwardly through the crankcase coaxially with said rotor and coupled thereto in driving engagement, a centrifugal-type cooling fan disposed above the generator rotor, coaxially and coupled in driving engagement with the crank shaft and extending outwardly over the generator stator; and an air induction casing surrounding said generator and at least the portion of said engine, said casing defining an air inlet surrounding said engine and an outlet adjacent said fan whereby said fan will draw cooling air into said casing, around said engine, upwardly through and around the stator and will expel said heated cooling air through the outlet without permitting the same to recirculate within said casing.
Claim 3
Dependent Claim
28 words
The forced air-cooled engine generator of in claim 1 wherein the stator include a working power generating coil and an ignition controlling power generating coil for the engine.
Claim 4
Dependent Claim
35 words
the forced air-cooled engine generator of claim 1, wherein said casing includes a support frame for the stator of the generator formed integrally with and disposed projecting from the upper surface of the crank case.
References Cited (Backward Citations)
US1892997A
Cited
US2469820A
Cited
US2543541A
Cited
US3064152A
Cited
US3643119A
Cited
US4173951A
Cited
JPS5939933A
Cited
US4553055A
Cited
US4540888A
Cited
JPS6077727A
Cited
US4622923A
Cited
US4647835A
Cited
US4677940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |