Patent US28135A successfully refreshed from Google Patents.
US3846984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature differential fluid motor
Assignee: Individual
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Filing: 1974-04-29
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Granted: 1974-11-12
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Expires: 1994-04-29
Abstract
Abstract The invention describes a unit pair of chambers with means of obtaining a temperature differential between the chambers, The chambers contain a low boiling point fluid defining a liquid phase and a vapor phase. By closing and opening of a communication between vapor phases of the chambers, cyclic differences in vapor pressure between the chambers is obtained. At least one of said chambers is provided with a moveable wall portion which responds to changes in the vapor pressure in the chamber. This movable wall also controls the opening between vapor phases of chambers. Controls and conduits are provided to return the condensed liquid from cold to warm chamber, and the return of moveable portion to its starting position. By means of proper linkages, the moveable wall is translated into useful work.
Inventors
- 👤 I Siegel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:54
CPC Classifications
F; F03; F03G; F03G4/00; F03G4/074
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
210 words
A temperature differential fluid motor comprising at least one relatively warm and at least one relatively cold chamber, inside of said chambers being sealed from the external environment, a supply of liquid disposed in said chambers dividing the chambers into a vapor chamber portion and a liquid chamber portion, at least one of said chambers having a moveable portion adapted to be displaced from an initial position when the vapor pressure within said chamber reaches one predetermined limit, means for returning said moveable portion to its initial position when vapor pressure in said chamber reaches another predetermined limit, vapor connecting means for placing the respective vapor portions of cold and warm chambers into communication, vapor control means for controlling the flow of vapor between said cold and warm chamber to create periodic pressure differential between said chambers, said control means being operatively associated with said moveable portion of one of said chambers, liquid connectinG means for placing the liquid portions of the respective cold and warm chambers into communication, liquid control means for controlling flow of liquid between said chambers, means for obtaining a temperature differential between said chambers, and a force transmission member connected to said moveable portion for translating the movement of said moving portion into useful work.
Claim 2
Dependent Claim
210 words
A temperature differential fluid motor comprising at least one relatively warm and at least one relatively cold chamber, inside of said chambers being sealed from the external environment, a supply of liquid disposed in said chambers dividing the chambers into a vapor chamber portion and a liquid chamber portion, at least one of said chambers having a moveable portion adapted to be displaced from an initial position when the vapor pressure within said chamber reaches one predetermined limit, means for returning said moveable portion to its initial position when vapor pressure in said chamber reaches another predetermined limit, vapor connecting means for placing the respective vapor portions of cold and warm chambers into communication, vapor control means for controlling the flow of vapor between said cold and warm chamber to create periodic pressure differential between said chambers, said control means being operatively associated with said moveable portion of one of said chambers, liquid connectinG means for placing the liquid portions of the respective cold and warm chambers into communication, liquid control means for controlling flow of liquid between said chambers, means for obtaining a temperature differential between said chambers, and a force transmission member connected to said moveable portion for translating the movement of said moving portion into useful work.
Claim 3
Dependent Claim
20 words
The invention as defined in claim 1 wherein said supply of liquid comprises a liquid having a low boiling point.
Claim 4
Dependent Claim
37 words
The invention as defined in claim 1 wherein means for returning moveable portion to its initial position include spring means acting on said moveable portion to impart a predetermined resistance to the movement of said moveable portion.
Claim 5
Dependent Claim
46 words
The invention as defined in claim 1 wherein both warm and cold chamber contain a moveable portion, said means for returning moveable portions to their initial position include a fulcrumed level, said lever having its opposed end portions operatively associated with moveable portions of said chambers.
Claim 6
Dependent Claim
22 words
The invention as defined in claim 4 including means to affect air compression in a chamber for affecting the position moving parts.
Claim 7
Dependent Claim
13 words
The invention as described in claim 1 wherein said connecting means include conduits.
Claim 8
Dependent Claim
22 words
The invention as defined in claim 1 wherein liquid control means for controlling flow of liquid between said chamber include pump means.
Claim 9
Dependent Claim
61 words
The invention as defined in claim 1 wherein means for controlling the flow of vapor between chambers include valve means operatively associated with said vapor connecting means for controlling the flow of vapor between said chambers, and including means operatively associated with said moveable portion for the actuation of said valve means for cycling the opening and closing of said communication.
Claim 10
Dependent Claim
55 words
The invention as defined in claim 1 wherein said liquid control means for controlling flow of liquid between said chambers include one way valve means, said valve means being operative to permit the liquid to flow from said chamber to said warm chamber but restricts flow of liquid from said warm to said cold chamber.
Claim 11
Dependent Claim
38 words
The invention as defined in claim 1 wherein said means for obtaining a temperature differential includes wetting exterior portion of one of said chambers and means for wetting said surface whereby said one chamber is cooled by evaporation.
Claim 12
Dependent Claim
25 words
The invention as defined in claim 1 wherein said means for obtaining said temperature differential including a heating means for heating one of said chambers.
Claim 13
Dependent Claim
22 words
The invention as defined in claim 1 including a container for submerging at least one of said chambers in a water bath.
Claim 14
Dependent Claim
31 words
The invention as defined in claim 1 wherein means for obtaining a temperature differential between said chambers include means for submerging at least one of said chambers in a liquid body.
References Cited (Backward Citations)
GB810662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |