Patent US3910064A successfully refreshed from Google Patents.
US3910064A
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Method and apparatus for producing variable temperature with the aid of a cryoliquid
Assignee: Max-Planck-Gesellschaft zur Förderung der Wissenschaften eV
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Filing: 1974-08-01
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Granted: 1975-10-07
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Expires: 1994-08-01
Abstract
Abstract A method of producing variable temperatures with the aid of a cryoliquid, wherein the cryoliquid is throttled in a heatinsulated section at a point having poor heat conductivity, and at a distance from this point there is produced a variable temperature adjustable to values greater or equal to the boiling temperature of the cryoliquid, and apparatus for carrying out the method comprising a supply vessel for low-temperature gas, an evaporating device in which the low-temperature gas is arranged to be evaporated and at which the refrigerating output is arranged to be collected, and a regulating device for adjusting a predetermined temperature at the evaporating device, wherein the supply vessel is connected to a heat-insulated section, a heatinsulating flow resistor is arranged in the heat-insulated section, the heat-insulated section is sealed off by a gas-tight closure by which an evaporation chamber is defined, and a heating device with variable heating output is arranged at a distance from the flow resistor.
Inventors
- 👤 Eberhard Gmelin
- 👤 Alpen Ulrich Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:07
CPC Classifications
F; F17; F17C; F17C13/00; F17C13/02; F17C13/026; F25; F25B; F25B19/00; F25D; F25D3/00; F25D3/10; F17C2203/00; F17C2203/03; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2227/00; F17C2227/03; F17C2227/0302; F17C2227/0304; F17C2250/00; F17C2250/06; F17C2250/0605; F17C2250/0631
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
116 words
Apparatus for utilizing a cryoliquid to produce variable temperatures within an evaporation chamber comprising, in combination, a supply reservoir of cryoliquid having a bottom outlet, a thermally insulated expansion chamber in communication with said bottom outlet through a conduit passage and having a lower portion, a flow resistor longitudinally movably mounted within said conduit passage controlling the flow of cryoliquid into said chamber in dependence upon the position of said flow resistor within said passage, and heating means within said chamber heating said chamber to produce a predetermined vapor pressure within said chamber for positioning said flow resistor to permit a predetermined flow of cryoliquid into said chamber to maintain a predetermined temperature within said chamber.
Claim 2
Dependent Claim
116 words
Apparatus for utilizing a cryoliquid to produce variable temperatures within an evaporation chamber comprising, in combination, a supply reservoir of cryoliquid having a bottom outlet, a thermally insulated expansion chamber in communication with said bottom outlet through a conduit passage and having a lower portion, a flow resistor longitudinally movably mounted within said conduit passage controlling the flow of cryoliquid into said chamber in dependence upon the position of said flow resistor within said passage, and heating means within said chamber heating said chamber to produce a predetermined vapor pressure within said chamber for positioning said flow resistor to permit a predetermined flow of cryoliquid into said chamber to maintain a predetermined temperature within said chamber.
Claim 3
Dependent Claim
36 words
Apparatus for utilizing a cryoliquid as in claim 1 wherein said flow resistor includes sealing means cooperating with said conduit passage, said sealing means having a variable cross section in the direction of flow resistor movement.
Claim 4
Dependent Claim
23 words
Apparatus for utilizing a cryoliquid as in claim 1 wherein said heating means comprises an electric resistance element within said chamber lower portion.
Claim 5
Dependent Claim
30 words
Apparatus for utilizing a cryoliquid as in claim 1 wherein said chamber lower portion includes a copper plate and said heating means includes an electric heating element within said plate.
Claim 6
Dependent Claim
46 words
Apparatus for utilizing a cryoliquid as in claim 1 wherein said flow resistor is of a conical configuration in the direction of flow resistor movement to vary the flow past said flow resistor in dependence upon the position of said flow resistor within said conduit passage.
Claim 7
Dependent Claim
29 words
Apparatus for utilizing a cryoliquid as in claim 1 wherein said expansion chamber includes an upper cylindrical wall, said upper wall constituting said conduit passage receiving said flow resistor.
Claim 8
Dependent Claim
86 words
Apparatus for utilizing a cryoliquid to produce variable temperatures within an evaporation chamber comprising, in combination, a supply reservoir of cryoliquid having a bottom outlet, a thermally insulated expansion chamber in communication with said bottom outlet through a conduit passage having a lower portion, a flow resistor mounted within said conduit passage controlling the flow of cryoliquid in said chamber, and heating means within said chamber heating said chamber to produce a predetermined vapor pressure within said chamber to maintain a predetermined temperature within said chamber.
Claim 9
Dependent Claim
86 words
Apparatus for utilizing a cryoliquid to produce variable temperatures within an evaporation chamber comprising, in combination, a supply reservoir of cryoliquid having a bottom outlet, a thermally insulated expansion chamber in communication with said bottom outlet through a conduit passage having a lower portion, a flow resistor mounted within said conduit passage controlling the flow of cryoliquid in said chamber, and heating means within said chamber heating said chamber to produce a predetermined vapor pressure within said chamber to maintain a predetermined temperature within said chamber.
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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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |