IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0137442
(2002-04-30)
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발명자
/ 주소 |
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출원인 / 주소 |
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인용정보 |
피인용 횟수 :
10 인용 특허 :
4 |
초록
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The present invention provides thermal devices, materials and methods for use in transferring heat from heat sources. One embodiment comprises a thermal transfer body that has first and second end portions and includes a thermally anisotropic material that conducts more thermal energy in a longitudi
The present invention provides thermal devices, materials and methods for use in transferring heat from heat sources. One embodiment comprises a thermal transfer body that has first and second end portions and includes a thermally anisotropic material that conducts more thermal energy in a longitudinal direction than in a direction transverse thereto, wherein at least one of the first and second end portions includes a projection having a surface area oriented obliquely to the longitudinal direction. Multiple projections may be provided of various geometries, such as pyramids, cones, triangular prismoids and domes. The thermally anisotropic material may include an ensemble of longitudinally thermally conductive fibers, such as carbon fibers derived from precursors such as petroleum or coal pitch, which may be embedded in a support matrix of various materials.
대표청구항
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1. A thermal device, comprising:(A) a thermal transfer body having first and second end portions, (1) wherein said thermal transfer body includes a thermally anisotropic material that conducts more thermal energy in a longitudinal direction than in a direction transverse thereto, (2) and wherein at
1. A thermal device, comprising:(A) a thermal transfer body having first and second end portions, (1) wherein said thermal transfer body includes a thermally anisotropic material that conducts more thermal energy in a longitudinal direction than in a direction transverse thereto, (2) and wherein at least one of said first and second end portions includes a projection having a surface area oriented obliquely to said longitudinal direction. 2. A thermal device according to claim 1 wherein at least one of said first and second end portions includes a plurality of projections extending therefrom.3. A thermal device according to claim 2 wherein said projections are similarly shaped.4. A thermal device according to claim 2 wherein said projections generally extend in said longitudinal direction.5. A thermal device according to claim 2 wherein each said projection includes a surface that extends in a plane oriented at an angle oblique to the longitudinal direction.6. A thermal device according to claim 5 wherein said angle is from about 40 to about 88 degrees.7. A thermal device according to claim 2 wherein said projections are of a shape selected from generally triangular pyismoidal shapes, generally pyramidal shapes, generally conical and generally hemispherical shapes.8. A thermal device according to claim 1 wherein said thermally anisotropic material includes an ensemble of longitudinally thermally conductive fibers.9. A thermal device according to claim 8 wherein said fibers are contained within a support matrix.10. A thermal device useful in transferring heat from a heat source, comprising:(A) a thermal transfer body that includes an ensemble of longitudinally thermally conductive fibers extending from a first end to a second end thereof, (1) wherein said first end of said thermal transfer body includes a thermal collector structure adapted to be placed in thermal communication with the heat source, (2) wherein said second end of said thermal transfer body includes a thermal dissipater structure adapted to dissipate heat therefrom, and (3) wherein at least one of said thermal collector structure and said thermal dissipater structure includes exposed end surface regions of said fibers that are oriented obliquely to a longitudinal direction of said fibers. 11. A thermal device according to claim 10 wherein said longitudinally conductive fibers are carbon fibers.12. A thermal device according to claim 11 wherein said carbon fibers are derived from a precursor selected from polyacrilonitrile, petroleum pitch, coal pitch and synthetic pitches.13. A thermal device according to claim 10 wherein said thermal transfer body is formed of a material wherein said ensemble of longitudinally thermally conductive fibers is embedded in a support matrix.14. A thermal device according to claim 13 wherein said support matrix is thermally conductive.15. A thermal device according to claim 13 wherein said support matrix is thermally insulating.16. A thermal device according to claim 13 wherein said support matrix is selected from epoxy, binder pitch, rubber, plastic, aluminum and copper.17. A thermal device according to claim 13 wherein said material further includes an additive embedded in said support matrix, said additive being selected from a group consisting of graphite, aluminum and copper.18. A thermal device according to claim 13 wherein said material is at least sixty percent carbon.19. A thermal device useful in transferring heat from a heat source, comprising:(A) a thermal transfer body that includes an ensemble of longitudinally thermally conductive fibers extending from a first end to a second end thereof, (1) wherein at least one of said first end and said second end includes at least one projection defined by (a) a base portion of a first cross-section, (b) a peak portion of a second cross-section smaller than said first cross-section, and (c) at least one sidewall extending between said base portion and said peak portion. 20. A thermal device according to claim 19 wherein said first cross-section and said second cross-section are each a geometric shape selected from circular, oval and polygonal.21. A thermal device according to claim 19 wherein said first cross-section and said second cross-section are different geometric shapes.22. A thermal device according to claim 19 wherein said first cross-section and said second cross-section are geometrically congruent.23. A thermal device according to claim 19 wherein at least one of said first end and said second end includes a plurality of said projections.24. A thermal device according to claim 23 wherein said projections are aligned in a regular array thereof.25. A thermal device according to claim 19 wherein said sidewall extends in a plane oriented at an angle oblique to a longitudinal direction of said fibers.26. A thermal device according to claim 25 wherein said angle is from about 40 to about 88 degrees.27. A thermal device according to claim 19 wherein said sidewall includes exposed end surface regions of said fibers that are oriented obliquely to a longitudinal direction of said fibers.28. A heat sink useful in dissipating heat from a heat source, comprising a thermal transfer body that includes an ensemble of longitudinally thermally conductive fibers extending from a first end to a second end thereof, and wherein said second end of said thermal transfer body includes a thermal dissipater structure having end surface regions of at least some of said fibers exposed and oriented obliquely to a longitudinal direction of said fibers.29. A thermal device useful in transferring heat from a heat source, comprising:(A) a support matrix formed of a bendable material; and (B) an ensemble of longitudinally extending, thermally conductive fibers formed of an anisotropic material that conducts more thermal energy in said longitudinal direction than in a direction transverse thereto, said fibers being embedded in said support matrix. 30. A thermal device according to claim 29 wherein said support matrix is flexible.31. A thermal device according to claim 29 wherein said support matrix is thermoformable.32. A thermal device according to claim 29 wherein said support matrix is selected from epoxy, binder pitch, rubber, plastic, aluminum and copper.33. A thermal device useful in transferring heat from a heat source, comprising:(A) a thermal transfer body that includes an ensemble of longitudinally extending, thermally conductive fibers formed of an anisotropic material that conducts more thermal energy in said longitudinal direction than in a direction transverse thereto, said fibers being braided together, at least some of said fibers having end surfaces configured at an angle that is oblique to the longitudinal direction. 34. A thermal device according to claim 33 wherein said thermal transfer body is disposed within a thermally insulating sheath.35. A thermal management device comprising:(A) a composite body formed by an ensemble of longitudinally thermally conducting fibers embedded in a support matrix of a first material, said composite body having (1) a base, and (2) at least one projection extending longitudinally from said base (a) with at least some of said fibers extending from said base in a longitudinal direction within said projection to terminate in end surfaces with at least some of the end surfaces oriented obliquely to the longitudinal direction. 36. A method of forming a thermal management device, comprising:(A) assembling a plurality of longitudinally thermally conducting fibers into a longitudinally extending ensemble that has a longitudinal axis; and (B) cutting at least some of said fibers such that at least some of said fibers have end surface regions oriented obliquely to the longitudinal axis. 37. An electrical assembly, comprising(A) at least one electrical component that produces heat during use; and (B) a heat sink in thermal communication with said electrical component, said heat sink comprising a thermal transfer body that includes an ensemble of longitudinally thermally conductive fibers extending from a first end to a second end thereof, and wherein said second end of said thermal transfer body is formed as a thermal dissipater structure having end surface regions of at least some of said fibers exposed and oriented obliquely to a longitudinal direction of said fibers.
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