Patent US5275231A successfully refreshed from Google Patents.
US5275231A
Expired / Lapsed
US
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Cooling system for an automotive engine
Assignee: Individual
•
Filing: 1992-12-11
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Granted: 1994-01-04
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Expires: 2012-12-11
Abstract
Abstract A cooling system for an automotive engine has a first passage provided between an outlet of a water jacket of the engine and an inlet of a radiator, a second passage provided between an outlet of the radiator and an inlet of the water jacket, and a first bypass passage provided between the first passage and the second passage. A second bypass passage is provided between the second passage upstream of a thermostat and the first bypass passage, so that a part of the coolant flows in the cooling system passing through the radiator, the second bypass passage, and the first bypass passage when a bypass valve of the thermostat is opened.
Inventors
- 👤 Yoshikazu Kuze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:57
CPC Classifications
F; F01; F01P; F01P7/00; F01P7/14; F01P7/16; F01P7/161; F01P11/00; F01P11/14; F01P11/16; G; G05; G05D; G05D23/00; G05D23/01; G05D23/13; G05D23/1306; G05D23/132; G05D23/1333; F01P2007/146
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
161 words
A cooling system for an automotive engine having a water jacket, having a radiator, a first passage provided between an outlet of the water jacket and an inlet of the radiator, a second passage provided between an outlet of the radiator and an inlet of the water jacket, a first bypass passage provided between the first passage and the second passage, a water pump provided in the second passage for circulating coolant in the system, a thermostat having a main valve provided in the second passage and a bypass valve provided in the first bypass passage, the improvement to the cooling system comprising: a second bypass passage provided between a first junction provided on the second passage upstream of the thermostat and a second junction provided on the first bypass passage, whereby a part of the coolant flows in the cooling system passing through the radiator, the second bypass passage, and the first bypass passage when the bypass valve is opened.
Claim 2
Dependent Claim
161 words
A cooling system for an automotive engine having a water jacket, having a radiator, a first passage provided between an outlet of the water jacket and an inlet of the radiator, a second passage provided between an outlet of the radiator and an inlet of the water jacket, a first bypass passage provided between the first passage and the second passage, a water pump provided in the second passage for circulating coolant in the system, a thermostat having a main valve provided in the second passage and a bypass valve provided in the first bypass passage, the improvement to the cooling system comprising: a second bypass passage provided between a first junction provided on the second passage upstream of the thermostat and a second junction provided on the first bypass passage, whereby a part of the coolant flows in the cooling system passing through the radiator, the second bypass passage, and the first bypass passage when the bypass valve is opened.
Claim 3
Dependent Claim
82 words
The system according to claim 1 wherein the first passage is provided between the outlet provided at an upper portion of the water jacket and the inlet provided at an upper portion of the radiator, and the second passage is provided between the outlet provided at a lower portion of the radiator and the inlet provided at a lower portion of the water jacket, and the first junction is provided at a portion of the second passage upstream of a thermostat cap.
Claim 4
Dependent Claim
74 words
The system according to claim 1 wherein the first passage is provided between the outlet provided at an upper portion of the water jacket and the inlet provided at an upper portion of the radiator, and the second passage is provided between the outlet provided at a lower passage of the radiator and the inlet provided at a lower portion of the water jacket, and the first junction is provided on a thermostat cap.
Claim 5
Dependent Claim
74 words
The system according to claim 1 wherein the first passage is provided between the outlet provided at an upper portion of the water jacket and the inlet provided at a lower portion of the radiator, and the second passage is provided between the outlet provided at an upper portion of the radiator and the inlet provided at a lower portion of the water jacket, and the first junction is provided on a thermostat cap.
Claim 6
Dependent Claim
19 words
The system according to claim 1 wherein the thermostat has a thermostat cap provided upstream of the main valve.
References Cited (Backward Citations)
US1311809A
Cited
US1318069A
Cited
US1403493A
Cited
US2422924A
Cited
US3510060A
Cited
SU396031A3
Cited
US3743452A
Cited
US4288031A
Cited
US4560104A
Cited
JPS59200011A
Cited
US4606302A
Cited
US4621594A
Cited
US4679530A
Cited
JPS61201816A
Cited
JPH0323311A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-01-03 | 1997-07-05 | 1998-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-03 | 2001-07-05 | 2002-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-03 | 2005-07-05 | 2006-01-04 | $7700.00 | Window Closed / Lapsed |