US5000256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer bag with thermal via
Assignee: 3M Co
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Filing: 1990-07-20
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Granted: 1991-03-19
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Expires: 2010-07-20
Abstract
Abstract A heat transfer bag especially useful for cooling electronic components is made of a flexible sheet of material and is filled with a fluorochemical heat transfer liquid. A metallic thermal via extends through a hole in the bag for direct contact with an external surface of a heat-generating component. A portion of the via extends into the bag and functions as a heat radiating fin to enhance the transfer of heat from the component to the liquid within the bag.
Inventors
- 👤 Lew A. Tousignant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:34
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/70; H10W40/77; H10W40/20; H10W40/25; H10W40/251; Y; Y10; Y10S; Y10S165/00; Y10S165/044; Y10S165/047; Y10S165/048
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
133 words
Heat transfer apparatus adapted for placement between a surface of a component to be cooled and a surface of a heat-dissipating body, said apparatus comprising: a flexible, sealed bag made of a sheet of material impermeable to air and having an internal compartment, said sheet having a hole; a quantity of heat transfer liquid substantially filling said compartment; a thermal via extending through said hole in said sheet and having a high thermal conductivity, said via having a first portion extending externally of said bag for thermal contact with a surface of a heat-generating component and a second portion extending internally in said compartment for contact with said heat transfer liquid said second portion having a larger surface area than said first portion; and means for sealingly connecting said via to said sheet.
Claim 2
Dependent Claim
133 words
Heat transfer apparatus adapted for placement between a surface of a component to be cooled and a surface of a heat-dissipating body, said apparatus comprising: a flexible, sealed bag made of a sheet of material impermeable to air and having an internal compartment, said sheet having a hole; a quantity of heat transfer liquid substantially filling said compartment; a thermal via extending through said hole in said sheet and having a high thermal conductivity, said via having a first portion extending externally of said bag for thermal contact with a surface of a heat-generating component and a second portion extending internally in said compartment for contact with said heat transfer liquid said second portion having a larger surface area than said first portion; and means for sealingly connecting said via to said sheet.
Claim 3
Dependent Claim
19 words
The apparatus of claim 1, wherein said second portion has a cross-sectional area that is larger than said hole.
Claim 4
Dependent Claim
56 words
The apparatus of claim 2, wherein said via includes an intermediate portion between said first portion and said second portion, and wherein said first portion has a cross-sectional area approximately equal to the area of said hole, and wherein said second portion is spaced from said sheet for contact on opposite sides thereof with said liquid.
Claim 5
Dependent Claim
14 words
The apparatus of claim 1, wherein said first portion has a flat, outermost surface.
Claim 6
Dependent Claim
24 words
The apparatus of claim 1, wherein said means for sealingly connecting said via to said sheet comprises a lock ring surrounding said first portion.
Claim 7
Dependent Claim
28 words
The apparatus of claim 5, wherein said means for sealingly connecting said via to said sheet further comprises an O-ring located between said lock ring and said via.
Claim 8
Dependent Claim
14 words
The apparatus of claim 1, wherein said sheet includes a layer comprised of aluminum.
Claim 9
Dependent Claim
33 words
The apparatus of claim 1, wherein said first portion and said second portion each have a generally cylindrical configuration, and said second portion has a diameter larger than the diameter of said portion.
Claim 10
Dependent Claim
15 words
The apparatus of claim 8, wherein said first portion and said second portion are coaxial.
Claim 11
Dependent Claim
14 words
The apparatus of claim 1, wherein said via is made of a metallic material.
Claim 12
Dependent Claim
12 words
The apparatus of claim 1, wherein said liquid comprises a fluorochemical liquid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-18 | 1994-09-17 | 1995-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-18 | 1998-09-17 | 1999-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-18 | 2002-09-17 | 2003-03-19 | $7700.00 | Window Closed / Lapsed |