US3591075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermostat for engine cooling water
Assignee: Individual
•
Filing: 1969-07-03
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Granted: 1971-07-06
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Expires: 1989-07-03
Abstract
Abstract The present invention is concerned with an improvement in thermostats to be installed between the water manifold and the radiator in the cooling system of a water-cooled internal combustion engine for controlling the flow rate of the engine cooling water to assure its smooth circulation and to prevent the overheating of the engine and the deterioration of the oil by maintaining normal engine temperature to increase the durability of the engine.
Inventors
- 👤 Yukio Onishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:33
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/02; G05D23/021; G05D23/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
An improvement in thermostats for engine cooling systems comprising an open frame housing, a heat conductive case, a heat expandable material in said case, a diaphragm positioned across the case and the material therein, a guide case having a longitudinal bore; a cup-shaped recess in one end opening into said bore and having said diaphragm extending across said recess, said recessed end of said guide case being attached to said heat conductive case, a semifluid material consisting of a mixture of silicon grease and molybdenum disulfide in said recess, an elastic body in said bore above said semifluid material, a plastic sheet on top of said elastic body in said bore, a piston slideably mounted in said bore with one end on said sheet and its opposite end outside said guide case bearing against said housing, a valve disc attached to said guide case, a valve seat carried by said housing capable of being closed by said valve disc, and a spring mounted between said valve disc and the interior of said housing.
Claim 2
Dependent Claim
173 words
An improvement in thermostats for engine cooling systems comprising an open frame housing, a heat conductive case, a heat expandable material in said case, a diaphragm positioned across the case and the material therein, a guide case having a longitudinal bore; a cup-shaped recess in one end opening into said bore and having said diaphragm extending across said recess, said recessed end of said guide case being attached to said heat conductive case, a semifluid material consisting of a mixture of silicon grease and molybdenum disulfide in said recess, an elastic body in said bore above said semifluid material, a plastic sheet on top of said elastic body in said bore, a piston slideably mounted in said bore with one end on said sheet and its opposite end outside said guide case bearing against said housing, a valve disc attached to said guide case, a valve seat carried by said housing capable of being closed by said valve disc, and a spring mounted between said valve disc and the interior of said housing.
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |