Patent US1138929A successfully refreshed from Google Patents.
Patent US3765383A successfully refreshed from Google Patents.
US3765383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansible reservoir unit for liquid cooled engines
Assignee: Individual
•
Filing: 1971-10-08
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Granted: 1973-10-16
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Expires: 1991-10-08
Abstract
Abstract An expansible coolant receiving reservoir receives the entire expanded volume of coolant in a liquid cooled system to provide for an air-free coolant system. A slightly increased pressure is applied to the coolant up through normal operating temperatures, and a substantially greater pressure at higher temperatures, both pressures being lower than the pressure radiator cap setting.
Inventors
- 👤 V Birdwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:59
CPC Classifications
F; F01; F01P; F01P11/00; F01P11/02; F01P11/029
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
154 words
In an engine having a pressurized liquid cooling system, an automatic pressure compensating unit, comprising: a. a closed expansible volume means having a direct fluid connection to the engine cooling system for receiving the entire expanded volume of cooLant when it expands due to engine operation, b. the expansible means having fill means for permitting filling of the entire volume of the expansible volume means to eliminate all air pockets from the system, c. yieldable contracting means associated with the expansible volume means for permitting it to accommodate the increased coolant volume, d. the contracting means including a low pressure compressing means for applying a small pressure on the expansible volume means through normal engine coolant operating temperatures, and e. the contracting means also including a high pressure compressing means for automatically applying a second and substantially greater pressure on the expansible volume means when higher than normal engine coolant operating temperatures are reached.
Claim 2
Dependent Claim
154 words
In an engine having a pressurized liquid cooling system, an automatic pressure compensating unit, comprising: a. a closed expansible volume means having a direct fluid connection to the engine cooling system for receiving the entire expanded volume of cooLant when it expands due to engine operation, b. the expansible means having fill means for permitting filling of the entire volume of the expansible volume means to eliminate all air pockets from the system, c. yieldable contracting means associated with the expansible volume means for permitting it to accommodate the increased coolant volume, d. the contracting means including a low pressure compressing means for applying a small pressure on the expansible volume means through normal engine coolant operating temperatures, and e. the contracting means also including a high pressure compressing means for automatically applying a second and substantially greater pressure on the expansible volume means when higher than normal engine coolant operating temperatures are reached.
Claim 3
Dependent Claim
73 words
In an engine having a pressurized liquid cooling system, an automatic pressure compensating unit as set forth in claim 1, wherein: a. the closed expansible volume means is a bellows, b. the yieldable contracting means includes a spring assembly which is connected to and pre-compresses the bellows to a point where the bellows is contracted until a volume greater than the expansion volume of the coolant at normal operating temperatures is received therein.
Claim 4
Dependent Claim
85 words
In an engine having a pressurized liquid cooling system, the automatic pressure compensating unit as set forth in claim 2, wherein: a. the bellows has an interior closed cylindrical member in sealing engagement therewith to form the inner wall of the closed expansible volume means, and b. the bellows has a top plate at the other end thereof, the expansible volume for receiving the expanded coolant being disposed between the closed end of the interior cylinder, the expanded section of bellows, and the top plate.
Claim 5
Dependent Claim
38 words
In an engine having a pressurized liquid cooling system, the automatic pressure compensating unit as set forth in claim 3, wherein: a. the closed expansible volume means is directly connected to the radiator of the liquid coolant system.
Claim 6
Dependent Claim
78 words
In an engine having a pressurized liquid cooling system, the automatic pressure compensating unit as set forth in claim 1, wherein: a. the closed expansible volume means includes two concentric annularly spaced bellows members connected in sealing engagement at their lower end, b. the yieldable contracting means includes an elongated spring assembly disposed within the two bellows members and connected at one end to the exterior bellows member and at the other end to the interior bellows member.
Claim 7
Dependent Claim
158 words
An expansible coolant receiving assembly for the expanded volume of coolant from the cooling system of an engine, comprising: a. a container having concentric inner and outer parallel walls disposed in close proximity with respect to each other defining therebetween a thin annular chamber, b. each of the walls having an end member at the same end, the end members disposed adjacent to each other, and defining a coolant receiving chamber therebetween which is in communication with the thin chamber between the inner and outer walls, c. bleed valve means connected to one of the walls and in communication with the coolant receiving chamber, d. one of the walls having an axial section which is expandable, e. mechanical means for exerting force on the walls for maintaining a slight pressure on expanded coolant received within the chamber, and f. conduit means connected through one of the walls for supplying expanded coolant from the cooling system of the engine.
Claim 8
Dependent Claim
158 words
An expansible coolant receiving assembly for the expanded volume of coolant from the cooling system of an engine, comprising: a. a container having concentric inner and outer parallel walls disposed in close proximity with respect to each other defining therebetween a thin annular chamber, b. each of the walls having an end member at the same end, the end members disposed adjacent to each other, and defining a coolant receiving chamber therebetween which is in communication with the thin chamber between the inner and outer walls, c. bleed valve means connected to one of the walls and in communication with the coolant receiving chamber, d. one of the walls having an axial section which is expandable, e. mechanical means for exerting force on the walls for maintaining a slight pressure on expanded coolant received within the chamber, and f. conduit means connected through one of the walls for supplying expanded coolant from the cooling system of the engine.
Claim 9
Dependent Claim
20 words
The expansible coolant receiving assembly as set forth in claim 6, wherein one of the walls is a bellows member.
Claim 10
Dependent Claim
27 words
The expansible coolant receiving assembly as set forth in claim 6, wherein: a. the mechanical means for exerting force on the walls is a compression spring assembly.
Claim 11
Dependent Claim
23 words
The expansible coolant receiving assembly as set forth in claim 7, wherein: a. both the inner and the outer wall are bellows members.
Claim 12
Dependent Claim
24 words
The expansible cOolant receiving assembly of claim 7, wherein: a. mechanical means for exerting force on the walls comprises an adjustable compression spring assembly.
Claim 13
Dependent Claim
28 words
The expansible coolant receiving assembly as set forth in claim 9, wherein: a. the mechanical means for exerting force on the walls is a central compression spring assembly.
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US2878794A
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US3168080A
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US3238932A
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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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |