US5152255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine cooling system for snowmobile
Assignee: Yamaha Motor Co Ltd
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Filing: 1992-01-13
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Granted: 1992-10-06
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Expires: 2012-01-13
Abstract
Abstract A snowmobile having a liquid cooled transversely disposed internal combustion engine comprised of two blocks each containing two cylinder in aligned fashion. The coolant pump for the engine is disposed on one side of the engine and communicates with cooling jacket inlets on the other side through conduits that extend through the crankcase for controlling the temperature of the crankcase.
Inventors
- 👤 Kazutaka Fukuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:14
CPC Classifications
F; F01; F01P; F01P5/00; F01P5/10; F01B; F01B1/00; F01B1/12; F01P11/00; F01P11/04; F01P7/00; F01P7/14; F01P7/16; F02; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B75/16; F02B75/18; F02B2075/1804; F02B2075/1808
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
83 words
A liquid cooled internal combustion engine having a cylinder block, a cylinder head affixed to said cylinder block, a cooling jacket for said engine, a crankcase affixed to said cylinder block, a coolant pump disposed on one side of said engine for circulating liquid coolant, said engine cooling jacket having an inlet on the other side of said engine, and conduit means extending at least in part through said crankcase for delivering coolant from said coolant pump to said engine cooling jacket inlet.
Claim 2
Dependent Claim
83 words
A liquid cooled internal combustion engine having a cylinder block, a cylinder head affixed to said cylinder block, a cooling jacket for said engine, a crankcase affixed to said cylinder block, a coolant pump disposed on one side of said engine for circulating liquid coolant, said engine cooling jacket having an inlet on the other side of said engine, and conduit means extending at least in part through said crankcase for delivering coolant from said coolant pump to said engine cooling jacket inlet.
Claim 3
Dependent Claim
29 words
A liquid cooled internal combustion engine as set forth in claim 1 further including an outlet from the engine cooling jacket disposed on the one side of the engine.
Claim 4
Dependent Claim
29 words
A liquid cooled internal combustion engine as set forth in claim 2 further including a thermostat disposed in the outlet for maintaining a uniform temperature in the cooling jacket.
Claim 5
Dependent Claim
29 words
A liquid cooled internal combustion engine as set forth in claim 1 wherein the coolant pump is disposed between the ends of the engine on the one side thereof.
Claim 6
Dependent Claim
29 words
A liquid cooled internal combustion engine as set forth in claim 4 wherein the conduit means comprises a plurality of conduits extending at least in part through the crankcase.
Claim 7
Dependent Claim
22 words
A liquid cooled internal combustion engine as set forth in claim 5 wherein the cooling jacket comprises a cylinder block cooling jacket.
Claim 8
Dependent Claim
22 words
A liquid cooled internal combustion engine as set forth in claim 5 wherein the cooling jacket comprises a cylinder head cooling jacket.
Claim 9
Dependent Claim
23 words
A liquid cooled internal combustion engine as set forth in claim 7 wherein the cooling jacket further comprises a cylinder block cooling jacket.
Claim 10
Dependent Claim
33 words
A liquid cooled internal combustion engine as set forth in claim 8 wherein the cooling jacket inlet communicates first with the cylinder block cooling jacket and then with the cylinder head cooling jacket.
Claim 11
Dependent Claim
29 words
A liquid cooled internal combustion engine as set forth in claim 9 further including an outlet from the cylinder head cooling jacket on the one side of the engine.
Claim 12
Dependent Claim
29 words
A liquid cooled internal combustion engine as set forth in claim 10 further including a thermostat disposed in the outlet for maintaining a uniform temperature in the cooling jacket.
Claim 13
Dependent Claim
42 words
A liquid cooled internal combustion engine as set forth in claim 4 wherein the cylinder block comprises a pair of cylinder blocks each having at least two cylinder bores formed therein and wherein the cylinder bores are all disposed in aligned relationship.
Claim 14
Dependent Claim
37 words
A liquid cooled internal combustion engine as set forth in claim 12 wherein each of the cylinder blocks is formed with a respective cooling jacket each having a respective inlet on the other side of the engine.
Claim 15
Dependent Claim
35 words
A liquid cooled internal combustion engine as set forth in claim 12 wherein there are a pair of cylinder heads each affixed to respective one of the cylinder blocks and each having a cooling jacket.
Claim 16
Dependent Claim
27 words
A liquid cooled internal combustion engine as set forth in claim 14 wherein the cylinder head cooling jackets and cylinder block cooling jackets communicate with each other.
Claim 17
Dependent Claim
32 words
A liquid cooled internal combustion engine as set forth in claim 15 wherein the coolant is delivered first to the cylinder block cooling jackets and then to the cylinder head cooling jackets.
Claim 18
Dependent Claim
26 words
A liquid cooled internal combustion engine as set forth in claim 16 further including a coolant outlet formed in at least one of the cylinder heads.
Claim 19
Dependent Claim
29 words
A liquid cooled internal combustion engine as set forth in claim 17 further including a thermostat disposed in the outlet for maintaining a uniform temperature in the cooling jacket.
Claim 20
Dependent Claim
25 words
A liquid cooled internal combustion engine as set forth in claim 1 in combination with a snowmobile having a driving track driven by said engine.
Claim 21
Dependent Claim
20 words
A snowmobile as set forth in claim 19 wherein the engine is disposed transversely across the front of the snowmobile.
Claim 22
Dependent Claim
18 words
A snowmobile as set forth in claim 20 further including a heat exchanging radiator disposed above the engine.
Claim 23
Dependent Claim
25 words
A snowmobile as set forth in claim 21 further including an outlet from the engine cooling jacket disposed on the one side of the engine.
Claim 24
Dependent Claim
25 words
A snowmobile as set forth in claim 22 further including a thermostat disposed in the outlet for maintaining a uniform temperature in the cooling jacket.
Claim 25
Dependent Claim
24 words
A snowmobile as set forth claim 21 wherein the coolant pump is disposed between the ends of the engine on the one side thereof.
Claim 26
Dependent Claim
25 words
A snowmobile as set forth in claim 24 wherein the conduit means comprises a plurality of conduits extending at least in part through the crankcase.
Claim 27
Dependent Claim
18 words
A snowmobile as set forth in claim 25 wherein the cooling jacket comprises a cylinder block cooling jacket.
Claim 28
Dependent Claim
18 words
A snowmobile as set forth in claim 25 wherein the cooling jacket comprises a cylinder head cooling jacket.
Claim 29
Dependent Claim
19 words
A snowmobile as set forth in claim 27 wherein the cooling jacket further comprises a cylinder block cooling jacket.
Claim 30
Dependent Claim
29 words
A snowmobile as set forth in claim 28 wherein the cooling jacket inlet communicates first with the cylinder block cooling jacket and then with the cylinder head cooling jacket.
Claim 31
Dependent Claim
25 words
A snowmobile as set forth in claim 29 further including an outlet from the cylinder head cooling jacket on the one side of the engine.
Claim 32
Dependent Claim
25 words
A snowmobile as set forth in claim 30 further including a thermostat disposed in the outlet for maintaining a uniform temperature in the cooling jacket.
Claim 33
Dependent Claim
38 words
A snowmobile as set forth in claim 24 wherein the cylinder block comprises a pair of cylinder blocks each having at least two cylinder bores formed therein and wherein the cylinder bores are all disposed in aligned relationship.
Claim 34
Dependent Claim
33 words
A snowmobile as set forth in claim 32 wherein each of the cylinder blocks is formed with a respective cooling jacket each having a respective inlet on the other side of the engine.
Claim 35
Dependent Claim
31 words
A snowmobile as set forth in claim 32 wherein there are a pair of cylinder heads each affixed to respective one of the cylinder blocks and each having a cooling jacket.
Claim 36
Dependent Claim
23 words
A snowmobile as set forth in claim 34 wherein the cylinder head cooling jackets and cylinder block cooling jackets communicate with each other.
Claim 37
Dependent Claim
28 words
A snowmobile as set forth in claim 35 wherein the coolant is delivered first to the cylinder block cooling jackets and then to the cylinder head cooling jackets.
Claim 38
Dependent Claim
22 words
A snowmobile as set forth in claim 36 further including a coolant outlet formed in at least one of the cylinder heads.
Claim 39
Dependent Claim
25 words
A snowmobile as set forth in claim 37 further including a thermostat disposed in the outlet for maintaining a uniform temperature in the cooling jacket.
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) | 1995-10-06 | 1996-04-06 | 1996-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-06 | 2000-04-06 | 2000-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-06 | 2004-04-06 | 2004-10-06 | $7700.00 | Window Closed / Lapsed |