Patent US4917201A successfully refreshed from Google Patents.
US4917201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor vehicle
Assignee: Kawasaki Motors Ltd
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Filing: 1987-10-19
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Granted: 1990-04-17
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Expires: 2007-10-19
Abstract
Abstract A motor vehicle having an air exhaust duct interposed between a radiator and an engine, the air exhaust duct being operative to guide cooling air that has cooled the radiator and became warm to flow in a direction in which the cooling air flows away from the engine without coming into contact therewith.
Inventors
- 👤 Tetsuzo Fujikawa
- 👤 Shinichi Tamba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:31
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/007; B; B60; B60K; B60K11/00; B60K5/00; B60K5/10; F01; F01P; F01P3/00; F01P3/18; F02B1/00; F02B1/02; F02B1/04; F02B75/02; F02B2075/022; F02B2075/027; F02F; F02F7/00; F02F7/006
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
99 words
A motor vehicle comprising: an engine, a crankshaft driven by said engine, a radiator located in the vicinity of said engine, a cooling fan interposed between said engine and said radiator and operatively connected to said crankshaft, an air exhaust duct interposed between said radiator and said engine, said air exhaust duct being operative to guide cooling air currents that have cooled the radiator and become warn to flow in a direction in which the cooling air currents flow away from the engine without coming into contact therewith, and an engine exhaust muffler located within said air exhaust duct.
Claim 2
Dependent Claim
99 words
A motor vehicle comprising: an engine, a crankshaft driven by said engine, a radiator located in the vicinity of said engine, a cooling fan interposed between said engine and said radiator and operatively connected to said crankshaft, an air exhaust duct interposed between said radiator and said engine, said air exhaust duct being operative to guide cooling air currents that have cooled the radiator and become warn to flow in a direction in which the cooling air currents flow away from the engine without coming into contact therewith, and an engine exhaust muffler located within said air exhaust duct.
Claim 3
Dependent Claim
18 words
A motor vehicle as claimed in claim 1 comprising. A fan shroud formed integrally with the exhaust duct.
Claim 4
Dependent Claim
27 words
A motor vehicle as claimed in claim 1 wherein said air exhaust duct has outlet ports facing radially outwardly of a plane in which said fan rotates.
Claim 5
Dependent Claim
25 words
A motor vehicle as claimed in claim 2 wherein said air exhaust duct comprises a right duct portion operatively connected to a left duct portion.
Claim 6
Dependent Claim
84 words
An air duct system for a power unit including an engine having a crankshaft and a fan operatively connected to said crankshaft and a radiator, said air duct system interposed between the radiator and the engine and comprising an air exhaust duct for guiding warm air away from the engine without coming into contact therewith, the warm air emanating from the vicinity of the radiator, said air exhaust duct adapted to enclosure at least a portion of an engine exhaust manifold within said duct.
Claim 7
Dependent Claim
84 words
An air duct system for a power unit including an engine having a crankshaft and a fan operatively connected to said crankshaft and a radiator, said air duct system interposed between the radiator and the engine and comprising an air exhaust duct for guiding warm air away from the engine without coming into contact therewith, the warm air emanating from the vicinity of the radiator, said air exhaust duct adapted to enclosure at least a portion of an engine exhaust manifold within said duct.
Claim 8
Dependent Claim
21 words
The air duct system duct according to claim 5, further including a fan shroud formed integrally with the air exhaust duct.
Claim 9
Dependent Claim
26 words
The air duct system according to claim 5 wherein said air exhaust duct has at least one outlet port facing radially outwardly of a horizontal plane.
Claim 10
Dependent Claim
25 words
The air duct system according to claim 5 wherein said air exhaust duct comprises a right duct portion operatively connected to a left duct portion.
Claim 11
Dependent Claim
13 words
The air duct system according to claim 5 further including an engine enclosure.
Claim 12
Dependent Claim
19 words
A motor vehicle as claimed in claim 1 wherein the air exhaust duct at least partially surrounds the engine.
Claim 13
Dependent Claim
22 words
The air duct system according to claim 5 wherein said air exhaust duct is adapted to at least partially surround the engine.
Claim 14
Dependent Claim
29 words
A motor vehicle as claimed in claim 1 wherein said air exhaust duct extends between a rear portion of the engine and a front wall of an engine enclosure.
Claim 15
Dependent Claim
25 words
A motor vehicle as claimed in claim 12 wherein said air exhaust duct communicates with apertures formed in said front wall of said engine enclosure.
Claim 16
Dependent Claim
30 words
A motor vehicle as claimed in claim 12 wherein said air exhaust duct is operatively connected to a duct portion associated with said front wall portion of said engine enclosure.
Claim 17
Dependent Claim
32 words
The air duct system according to claim 5 wherein said air exhaust duct is adapted to extend between a rear portion of the engine and a front wall of an engine enclosure.
Claim 18
Dependent Claim
28 words
The air duct system according to claim 15 wherein said air exhaust duct is adapted to communicate with apertures formed in the front wall of said engine enclosure.
Claim 19
Dependent Claim
32 words
The air duct system according to claim 15 wherein said air exhaust duct is operatively connected to a duct portion adapted to be associated with a front wall portion of an engine
Claim 20
Dependent Claim
25 words
A motor vehicle as claimed in claim 1 wherein at least a portion of an engine exhaust manifold is enclosed within said air exhaust duct.
Claim 21
Dependent Claim
80 words
A an air duct system for a power unit including an engine having a crankshaft and a fan operatively connected to said crankshaft and a radiator, said air duct system interposed between the radiator and the engine and comprising an air exhaust duct for guiding warm air away from the engine without coming in contact therewith, the warm air emanating from the vicinity of the radiator, said air exhaust duct adapted to enclosure an engine exhaust muffler within said duct.
Claim 22
Dependent Claim
80 words
A an air duct system for a power unit including an engine having a crankshaft and a fan operatively connected to said crankshaft and a radiator, said air duct system interposed between the radiator and the engine and comprising an air exhaust duct for guiding warm air away from the engine without coming in contact therewith, the warm air emanating from the vicinity of the radiator, said air exhaust duct adapted to enclosure an engine exhaust muffler within said duct.
Claim 23
Dependent Claim
21 words
The air duct system duct according to claim 19, further including a fan shroud formed integrally with the air exhaust duct.
Claim 24
Dependent Claim
26 words
The air duct system according to claim 19 wherein said air exhaust duct has at least one outlet port facing radially outwardly of a horizontal plane.
Claim 25
Dependent Claim
25 words
The air duct system according to claim 19 wherein said air exhaust duct comprises a right duct portion operatively connected to a left duct portion.
Claim 26
Dependent Claim
13 words
The air duct system according to claim 19 further including an engine enclosure.
Claim 27
Dependent Claim
22 words
The air duct system according to claim 19 wherein said air exhaust duct is adapted to at least partially surround the engine.
Claim 28
Dependent Claim
32 words
The air duct system according to claim 19 wherein said air exhaust duct is adapted to extend between a rear portion of the engine and a front wall of an engine enclosure.
Claim 29
Dependent Claim
28 words
The air duct system according to claim 25 wherein said air exhaust duct is adapted to communicate with apertures formed in the front wall of said engine enclosure.
Claim 30
Dependent Claim
33 words
The air duct system according to claim 25 wherein said air exhaust duct is operatively connected to a duct portion adapted to be associated with a front wall portion of an engine enclosure.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-16 | 1993-10-16 | 1994-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-16 | 1997-10-16 | 1998-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-16 | 2001-10-16 | 2002-04-17 | $7700.00 | Window Closed / Lapsed |