US3853098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Driving system for automobile engine cooling fan
Assignee: Denso Corp
•
Filing: 1973-09-21
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Granted: 1974-12-10
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Expires: 1993-09-21
Abstract
Abstract In an automobile engine cooling system of the type in which the engine cooling water is circulated in a radiator and a cooling fan provided to supply a draft of cooling air through the radiator is driven by the engine, a cooling fan driving system comprising an one-way clutch provided between the cooling fan and the engine to transmit the power in one direction but not the other, i.e., from the engine side to the cooling fan side, a motor for driving the cooling fan at a higher speed with the increased number of revolutions than that of the engine at the idling speed, and motor control means for automatically switching on the motor when the engine temperature exceeds a preset temperature or when the automobile is idling or moving at slow speeds.
Inventors
- 👤 T Ishikawa
- 👤 M Ohshima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:35
CPC Classifications
F; F01; F01P; F01P7/00; F01P7/02; F01P7/04; F01P7/048; F01P5/00; F01P5/02; F01P5/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
83 words
In a driving system for an automobile engine cooling fan comprising a radiator, and a cooling fan driven by an engine to draw cooling air through the radiator, the improvement comprising a first one-way clutch provided between said cooling fan and said engine to allow the transmission of driving power in only one direction from said engine to said cooling fan, a motor coupled to drive said cooling fan, a motor control means for controlling a supply of electric power to said motor.
Claim 2
Dependent Claim
83 words
In a driving system for an automobile engine cooling fan comprising a radiator, and a cooling fan driven by an engine to draw cooling air through the radiator, the improvement comprising a first one-way clutch provided between said cooling fan and said engine to allow the transmission of driving power in only one direction from said engine to said cooling fan, a motor coupled to drive said cooling fan, a motor control means for controlling a supply of electric power to said motor.
Claim 3
Dependent Claim
23 words
A driving system according to claim 1, wherein said motor is mounted on the same shaft on which said cooling fan is mounted.
Claim 4
Dependent Claim
37 words
A driving system according to claim 1, wherein said motor control means detects the number of revolutions of said engine, whereby said motor is operAted when said detected number of revolutions is lower than a predetermined value.
Claim 5
Dependent Claim
33 words
A driving system according to claim 1, wherein said motor control means detects the temperature of said engine, whereby said motor is operated when said detected temperature is higher than a predetermined value.
Claim 6
Dependent Claim
14 words
A driving system according to claim 1, wherein said motor comprises a printed motor.
Claim 7
Dependent Claim
39 words
A driving system according to claim 1 further comprising a second one-way clutch provided between said cooling fan and said motor to allow the transmission of driving power in only one direction from said motor to said cooling fan.
Claim 8
Dependent Claim
19 words
A driving system according to claim 6, wherein said second one-way clutch is mounted on said first one-way clutch.
Claim 9
Dependent Claim
21 words
A driving system according to claim 6, wherein said second one-way clutch is mounted on the driving shaft of said motor.
References Cited (Backward Citations)
US1373848A
Cited
US1481307A
Cited
US1662723A
Cited
US1900586A
Cited
US1934783A
Cited
US2396000A
Cited
US2452264A
Cited
FR924950A
Cited
US3120219A
Cited
US3394682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |