US4327673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine cooling system
Assignee: Individual
•
Filing: 1981-04-13
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Granted: 1982-05-04
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Expires: 2001-04-13
Abstract
Abstract The invention makes use of a second thermostat in an engine cooling system, normally equipped with only a single thermostat. The second thermostat differs from the single thermostat in that provision is made for a constant, though materially diminished, flow of coolant past the second thermostat which, when the need arises, is converted to full flow by action of the second thermostat.
Inventors
- 👤 Elmer F. Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:11
CPC Classifications
F; F01; F01P; F01P7/00; F01P7/14; F01P7/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
139 words
A system for embodiment in a cooling circuit for a combustion engine in which the circuit makes use of a cooling jacket for the engine, a radiator, a hot coolant outflow line from the jacket to the radiator, a cool coolant inflow line from the radiator to the jacket and a circulating pump in said circuit, said system comprising a first thermostat activated valve device in said outflow line triggered to operate at a selected temperature, a second thermostat activated valve device in said inflow line triggered to operate at a selected temperature, said first valve device when in normal position having a full shut-off adjacent and when triggered to operate having a full flow adjustment, said second valve device when in normal position having a partial flow adjustment and when triggered to operate having a full flow adjustment.
Claim 2
Independent Claim
139 words
A system for embodiment in a cooling circuit for a combustion engine in which the circuit makes use of a cooling jacket for the engine, a radiator, a hot coolant outflow line from the jacket to the radiator, a cool coolant inflow line from the radiator to the jacket and a circulating pump in said circuit, said system comprising a first thermostat activated valve device in said outflow line triggered to operate at a selected temperature, a second thermostat activated valve device in said inflow line triggered to operate at a selected temperature, said first valve device when in normal position having a full shut-off adjacent and when triggered to operate having a full flow adjustment, said second valve device when in normal position having a partial flow adjustment and when triggered to operate having a full flow adjustment.
Claim 3
Dependent Claim
23 words
A system as in claim 1 wherein said second thermostat activated valve device is at a location between the radiator and the jacket.
Claim 4
Dependent Claim
24 words
A system as in claim 2 wherein the circulating pump is at a location between the second thermostat activated valve device and the jacket.
Claim 5
Dependent Claim
23 words
A system as in claim 1 wherein said partial flow adjustment is at about 1/4 the full flow capacity of said inflow line.
Claim 6
Dependent Claim
24 words
A system as in claim 1 wherein there is a bypass passage in said second thermostat activated valve device for said partial flow adjustment.
Claim 7
Dependent Claim
34 words
A system as in claim 1 wherein said second thermostat activated valve device comprises, a valve seat and valve element, said partial flow adjustment comprising a partial flow passage means through said valve element.
Claim 8
Dependent Claim
29 words
A system as in claim 1 wherein said second thermostat activated valve device and said first thermostat activated valve device are triggered to operate at substantially the same temperature.
References Cited (Backward Citations)
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US1332332A
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US1863437A
Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-03 | 1985-11-02 | 1986-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-03 | 1989-11-02 | 1990-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-03 | 1993-11-02 | 1994-05-04 | $7700.00 | Window Closed / Lapsed |