Patent US3794110A successfully refreshed from Google Patents.
US3794110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger and method of manufacturing the same
Assignee: US Philips Corp
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Filing: 1972-05-15
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Granted: 1974-02-26
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Expires: 1992-05-15
Abstract
Abstract A heat exchanger comprising a readily heat-conducting block of material having at least one chamber, a gas-permeable filling mass in said chamber, the mass consisting of particles of readily heat-conducting material sintered together with a layer of a readily heat-conducting material provided on an outer circumferential surface of the mass, and a soldered joint provided between the layer and the inner wall of the chamber in at least one zone extending throughout the circumference of the filling mass.
Inventors
- 👤 A Severijns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:52
CPC Classifications
F; F28; F28F; F28F7/00; F28F7/02; F28F1/00; F28F1/10; F28F1/40; F28F13/00; F28F13/003; F28F2255/00; F28F2255/18; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/395; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
169 words
A heat exchanger for use in a temperature range below 2* K, comprising, a block of readily-heat-conducting material, the block having at least one internal chamber defining inner walls, the chamber further having inlet and outlet means thus defining a flow path through said chamber, a gas-permeable filling mass having an outer surface and formed of sintered particles of a readily-heat-conducting material, a layer of readily-heatconducting material deposited on said outer surface of the filling mass, said mass disposed within said flow path and constituting a partition of predetermined length between the inlet and the outlet, with said layer on said mass being in direct heat exchange contact with said inner walls of the chamber, and a soldered junction between said chamber walls and said layer on said filling mass, the junction defining a circumferential zone of smaller thickness in the flow path direction than said length of the mass, sealing said mass to said chamber walls such that the inlet and outlet can communicate only through said mass.
Claim 2
Dependent Claim
169 words
A heat exchanger for use in a temperature range below 2* K, comprising, a block of readily-heat-conducting material, the block having at least one internal chamber defining inner walls, the chamber further having inlet and outlet means thus defining a flow path through said chamber, a gas-permeable filling mass having an outer surface and formed of sintered particles of a readily-heat-conducting material, a layer of readily-heatconducting material deposited on said outer surface of the filling mass, said mass disposed within said flow path and constituting a partition of predetermined length between the inlet and the outlet, with said layer on said mass being in direct heat exchange contact with said inner walls of the chamber, and a soldered junction between said chamber walls and said layer on said filling mass, the junction defining a circumferential zone of smaller thickness in the flow path direction than said length of the mass, sealing said mass to said chamber walls such that the inlet and outlet can communicate only through said mass.
Claim 3
Dependent Claim
138 words
A heat exchanger comprising a copper block having at least one internal chamber defining inner walls, and spaced apart inlet and outlet ducts thus defining a flow path through the chamber, a gas-permeable filling mass defining an outer surface, the mass formed of sintered copper particles, a layer of electrolytically deposited copper on said outer surface of said filling mass, said mass disposed within said flow path and constituting a partition between the inlet and the outlet with said layer on said mass being in direct heat exchange contact with said inner walls of the chamber, and a copper solder junction between said chamber walls and said layer on said filling mass the junction defining a circumferential annular zone sealing said mass to said chamber walls such that the inlet and outlet can communicate only through said mass.
Claim 4
Dependent Claim
138 words
A heat exchanger comprising a copper block having at least one internal chamber defining inner walls, and spaced apart inlet and outlet ducts thus defining a flow path through the chamber, a gas-permeable filling mass defining an outer surface, the mass formed of sintered copper particles, a layer of electrolytically deposited copper on said outer surface of said filling mass, said mass disposed within said flow path and constituting a partition between the inlet and the outlet with said layer on said mass being in direct heat exchange contact with said inner walls of the chamber, and a copper solder junction between said chamber walls and said layer on said filling mass the junction defining a circumferential annular zone sealing said mass to said chamber walls such that the inlet and outlet can communicate only through said mass.
Claim 5
Dependent Claim
20 words
Apparatus according to claim 1 wherein said block has a second chamber spaced from and similar to the first chamber.
Claim 6
Dependent Claim
13 words
Apparatus according to claim 1 wherein said lAyer is an electrolytically deposited layer.
Claim 7
Dependent Claim
17 words
Apparatus according to claim 1 wherein said block, the filling mass, and said layer are all copper.
Claim 8
Dependent Claim
22 words
Apparatus according to claim 1 wherein said solder junction defines an annular ring defining a plane generally transverse to said flow path.
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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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |