US4030900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling device
Assignee: US Philips Corp
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Filing: 1975-12-19
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Granted: 1977-06-21
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Expires: 1995-12-19
Abstract
Abstract A cooling device comprising a cooling element which is arranged in a space to be cooled. The cooling element has connected thereto an inlet duct for a cooled medium flow, which successively includes, viewed in the downstream direction, a heat exchanger in heat-exchanging contact with the cooling element but heat-insulated with respect to the space, and a restriction for blocking the medium flow in the case of an inadmissible temperature rise of the space.
Inventors
- 👤 Joannes Wilhelmus Van Litsenburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:51
CPC Classifications
F; F25; F25B; F25B9/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
127 words
A cooling device for maintaining a low operating temperature in an enclosure, comprising, boundary means defining said enclosure and containing a liquified gas, said enclosure having an inlet duct conveying a flow of cooled medium to said enclosure, and an outlet duct for conveying said cooled medium from said enclosure, said ducts passing through at least one boundary wall defining said enclosure, the path between said inlet duct and said outlet duct including the serial connection of a heat exchanger, a restriction means and a cooling element, said restriction means being situated between said heat exchanger and said cooling element, means positioning said heat exchanger in said enclosure in heat exchanging contact with said cooling element, and means for heat insulating said heat exchanger from said enclosure.
Claim 2
Dependent Claim
127 words
A cooling device for maintaining a low operating temperature in an enclosure, comprising, boundary means defining said enclosure and containing a liquified gas, said enclosure having an inlet duct conveying a flow of cooled medium to said enclosure, and an outlet duct for conveying said cooled medium from said enclosure, said ducts passing through at least one boundary wall defining said enclosure, the path between said inlet duct and said outlet duct including the serial connection of a heat exchanger, a restriction means and a cooling element, said restriction means being situated between said heat exchanger and said cooling element, means positioning said heat exchanger in said enclosure in heat exchanging contact with said cooling element, and means for heat insulating said heat exchanger from said enclosure.
Claim 3
Dependent Claim
33 words
A cooling device as claimed in claim 1, wherein said inlet of said heat exchanger is situated in said enclosure at a level lower than that of the outlet of said heat exchanger.
Claim 4
Dependent Claim
45 words
A cooling device as claimed in claim 2, wherein at least one heat exchanging element is included in said inlet duct between said heat exchanger and said restriction means, said heat exchanging element being arranged in said enclosure in heat exchange contact with said enclosure.
Claim 5
Dependent Claim
24 words
The cooling device of claim 1, wherein said means positioning is a metal block physically contacting both said cooling element and said heat exchanger.
Claim 6
Dependent Claim
24 words
The cooling device of claim 1, wherein said means positioning is a copper block physically contacting both said cooling element and said heat exchanger.
Claim 7
Dependent Claim
32 words
The cooling device of claim 1, wherein said means for heat insulating said heat exchanger from said enclosure is a layer of heat insulating material at least partially enclosing said heat exchanger.
References Cited (Backward Citations)
US3908397A
Cited
US3910063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |