Patent US5126150A successfully refreshed from Google Patents.
Patent US3761220A successfully refreshed from Google Patents.
US3761220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressing device
Assignee: US Philips Corp
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Filing: 1971-09-07
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Granted: 1973-09-25
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Expires: 1991-09-07
Abstract
Abstract A pressing device has pressing elements which are hollow and closed, each having first and second heat transmission walls with a heat transporting medium present in the cavity within each element. The medium absorbs thermal energy from the first heat transmission wall while changing from the liquid phase into the vapor phase and delivers thermal energy to the second heat transmission wall, while changing from the vapor phase into the liquid phase, and absorbs thermal energy from the second heat transmission wall while changing from the liquid phase into the vapor phase and delivers thermal energy to the first heat transmission wall while changing from the vapor phase into the liquid phase. In each cavity a porous mass is present connecting the heat transmission walls in such manner that all the heat transporting medium condensed on the second or first heat transmission wall can flow respectively through the said mass by capillary action.
Inventors
- 👤 A Dirne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:49
CPC Classifications
F; F28; F28D; F28D15/00; F28D15/02; F28D15/04; B; B29; B29C; B29C43/00; B29C43/32; B29C43/52; B30; B30B; B30B11/00; B30B11/02; B30B11/027; B30B15/00; B30B15/34; C; C03; C03B; C03B11/00; C03B11/12; C03B11/125; C03B11/127; B29C59/00; B29C59/02; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
257 words
An apparatus for pressing a material and operable with a thermal energy source, comprising: two pressing elements, each comprising walls having an inner surface which define a closed cavity, said walls including a first heat transfer wall and spaced therefrom a second heat transfer wall, a heat transporting medium within each cavity, said medium being changeable from liquid to vapor when heat is transferred thereto, and from vapor to liquid when heat is removed therefrom, a porous mass on said inner wall surfaces interconnecting said first and second heat transfer walls, said porous mass permitting capillary flow of said medium in its liquid form, said first heat transfer walls having outer surfaces being pressing surfaces, means for moving at least one of said elements relative to the other such that said pressing surfaces are movable toward each other for pressing said material therebetween and away from each other, said first heat transfer walls being in heat-transfer relationship with said material when in contact therewith, and said second heat-transfer walls being in heat transfer relationship with said thermal energy source whereby heat is transferrable from said thermal energy source through said second heat transfer walls to said heat transporting medium in liquid form which vaporizes and moves to said first heat transfer walls where said medium is condensed as heat is tranferred from the medium to and through the first heat transfer wall to said medium to be pressed, and said condensed medium flows by capillary action through said porous mass, back to said second heat transfer wall.
Claim 2
Independent Claim
257 words
An apparatus for pressing a material and operable with a thermal energy source, comprising: two pressing elements, each comprising walls having an inner surface which define a closed cavity, said walls including a first heat transfer wall and spaced therefrom a second heat transfer wall, a heat transporting medium within each cavity, said medium being changeable from liquid to vapor when heat is transferred thereto, and from vapor to liquid when heat is removed therefrom, a porous mass on said inner wall surfaces interconnecting said first and second heat transfer walls, said porous mass permitting capillary flow of said medium in its liquid form, said first heat transfer walls having outer surfaces being pressing surfaces, means for moving at least one of said elements relative to the other such that said pressing surfaces are movable toward each other for pressing said material therebetween and away from each other, said first heat transfer walls being in heat-transfer relationship with said material when in contact therewith, and said second heat-transfer walls being in heat transfer relationship with said thermal energy source whereby heat is transferrable from said thermal energy source through said second heat transfer walls to said heat transporting medium in liquid form which vaporizes and moves to said first heat transfer walls where said medium is condensed as heat is tranferred from the medium to and through the first heat transfer wall to said medium to be pressed, and said condensed medium flows by capillary action through said porous mass, back to said second heat transfer wall.
Claim 3
Dependent Claim
21 words
Apparatus according to claim 1 whrein the porous mass covers the whole inner surface of the cavity within the pressing element.
Claim 4
Dependent Claim
46 words
Apparatus according to claim 1 and subjectable to external pressure forces against and compressing the walls of said pressing elements, wherein each of said pressing elements further comprises at least one supporting element within the cavity contacting said inner surfaces for providing support against said pressure.
Claim 5
Dependent Claim
169 words
Apparatus according to claim 3 wherein each of said supporting elements comprises a compressed porous filling mass, the pores of which have such a size that the relationship (2 gamma cos theta /R) -p - Rho gh (2 gamma cos 1/R1) is fulfilled, in which gamma surface tension of liquid heat transporting medium. R hydraulic radius of the pores in the porous mass. theta angle of contAct of liquid heat transporting medium in the pores of the porous mass. R1 hydraulic radius of the pores in the filling mass. 1 angle of contact of liquid heat transporting medium in the pores of the filling mass. Delta p pressure loss of liquid heat transporting medium in the porous mass between the first and second heat transmission wall as a result of the resistance to flow of said mass. delta density of liquid heat transporting medium. g acceleration of gravity. h difference in height between the first and the second heat transmission wall to be overcome by liquid heat transporting medium.
Claim 6
Dependent Claim
14 words
Apparatus according to claim 4 wherein said porous filling mass comprises compressed steel wool.
Claim 7
Dependent Claim
120 words
Apparatus according to claim 5 wherein each pressing element further comprises within the cavity a container having an internal space and including therein an inert, non-condensable control gas, the container being nearer to the second heat transfer wall than to the first and having low thermal conductivity with said first wall, said space being in open communication with the cavity within said pressing element, whereby said control gas exposes for heat transfer more of the second heat transmission wall when the medium vapor pressure exceeds the nominal value of the said pressure corresponding to the nominal operating temperature of the first heat transmission wall, and exposes less of said second wall when the vapor pressure falls below said nominal value.
Claim 8
Dependent Claim
44 words
A pressing device as claimed in claim 6, characterized in that the container comprises a further porous mass in such manner that liquid heat transporting medium which has reached the container can flow back, through said further mass, to the cavity by capillary action.
Claim 9
Independent Claim
253 words
An apparatus for pressing a material and operable with a thermal energy sink comprising: two pressing elements, each comprising walls having an inner surface which define a closed cavity, said walls including a first heat transfer wall and spaced therefrom a second heat transfer wall, a heat transporting medium wtihin each cavity, said medium being changeable from liquid to vapor when heat is transferred thereto, and from vapor to liquid when heat is removed therefrom, a porous mass on said inner wall surfaces interconnecting said first and second heat transfer walls, said porous mass permitting capillary flow of said medium in its liquid form, said first heat transfer walls having outer surfaces being pressing surfaces, means for moving at least one of said elements relative to the other such that said pressing surfaces are movable toward each other for pressing said material therebetween and away from each other, said first heat transfer walls being in heat-transfer relationship with said material when in contact therewith, and said second heat-transfer walls being in heat transfer relationship with said thermal energy sink whereby heat is transferrable from said material through said first heat transfer walls to said heat transporting medium in liquid form which vaporizes and moves to said second heat transfer walls where said medium is condensed as heat is transferred from the medium to and through said second heat transfer walls to said heat sinks, and said condensed medium flows by capillary action through said porous mass, back to said first heat transfer walls.
Claim 10
Independent Claim
253 words
An apparatus for pressing a material and operable with a thermal energy sink comprising: two pressing elements, each comprising walls having an inner surface which define a closed cavity, said walls including a first heat transfer wall and spaced therefrom a second heat transfer wall, a heat transporting medium wtihin each cavity, said medium being changeable from liquid to vapor when heat is transferred thereto, and from vapor to liquid when heat is removed therefrom, a porous mass on said inner wall surfaces interconnecting said first and second heat transfer walls, said porous mass permitting capillary flow of said medium in its liquid form, said first heat transfer walls having outer surfaces being pressing surfaces, means for moving at least one of said elements relative to the other such that said pressing surfaces are movable toward each other for pressing said material therebetween and away from each other, said first heat transfer walls being in heat-transfer relationship with said material when in contact therewith, and said second heat-transfer walls being in heat transfer relationship with said thermal energy sink whereby heat is transferrable from said material through said first heat transfer walls to said heat transporting medium in liquid form which vaporizes and moves to said second heat transfer walls where said medium is condensed as heat is transferred from the medium to and through said second heat transfer walls to said heat sinks, and said condensed medium flows by capillary action through said porous mass, back to said first heat transfer walls.
References Cited (Backward Citations)
US3178792A
Cited
US3644110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |