Heat absorbing temperature control devices that include hydroxide

• US 7,566,484 B2
• Filed: 12/17/2003
• Issued: 07/28/2009
• Est. Priority Date: 09/07/1995
• Status: Expired due to Fees

• Current Assignee: Hayes And Associates
• Original Assignee: Hayes And Associates
• Inventors: Hayes, Claude Q. C.
• Primary Examiner(s): Dye; Rena L.
• Assistant Examiner(s): AUGHENBAUGH, WALTER
• Application Number:
  US10/738,471
• Publication Number:
  US 20040253397A1
• Time in Patent Office: 2,050 Days
• Field of Search: 165/10, 165/104.15, 165/104.17, 165/104.21, 165/905, 428/34.1, 428/920, 428/921, 252/70, 312/409, 312/406.1, 220/560.01, 220/560.05, 109/80, 109/82, 109/84, 432/4, 432/12, 174/52.2
• US Class Current: 428/34.1
• CPC Class Codes: A21D 8/06 Baking processes
• CPC Class Codes: A23G 7/02 Cooling or drying apparatus
• CPC Class Codes: B65B 23/10 Packaging biscuits
• CPC Class Codes: C09K 5/18 Non-reversible chemical reactions
• CPC Class Codes: H05K 5/0211 Thermal buffers, e.g. latent heat absorbers
• CPC Class Codes: H05K 5/0213 Venting apertures; Constructional details thereof
• CPC Class Codes: Y10S 165/902 Heat storage
• CPC Class Codes: Y10S 165/905 Materials of manufacture
• CPC Class Codes: Y10S 428/92 Fire or heat protection feature
• CPC Class Codes: Y10S 428/921 Fire or flameproofing
• CPC Class Codes: Y10T 428/13 Hollow or container type article [e.g., tube, vase, etc.]
• CPC Class Codes: Y10T 428/31504 Composite [nonstructural laminate]

Abstract

The increase of temperature of heat sensitive devices during heat generating conditions is prevented through the absorption of heat, by providing a hydroxide, such as Lithium Hydroxide, Sodium Hydroxide, Potassium Hydroxide, Magnesium Hydroxide, Calcium Hydroxide, Beryllium Hydroxide, Aluminum Hydroxide, Ammonium Hydroxide and mixtures thereof, in an amount sufficient to effect the required heat absorption. Where the heat generating conditions are generated by a heat generator, separate and distinct from the heat sensitive device, the hydroxide may be supported in a position between the heat sensitive device and the heat generator. Where the heat sensitive device is itself the heat generator, the hydroxide is in contact with the heat sensitive device, either directly or indirectly.

Claims

1. An article of manufacture for heat absorption, comprising:

(a) a flight data recorder that includes electronics that are sensitive to heat;

(b) hydroxide having a formula of M_x(OH)_y, wherein “

M”

is selected from the group consisting of lithium, sodium, potassium, magnesium, calcium, beryllium, aluminum and ammonium, and wherein “

x” and

“

y”

are integers, said hydroxide being provided in an amount sufficient to effect a level of heat absorption so as to protect the electronics within the flight data recorder from damage based upon exposure to a predetermined level of heat exposure;

(c) support means for supporting said hydroxide, said hydroxide being supportable in relation to the flight data recorder by said support means;

wherein said hydroxide effects said level of heat absorption at least in part based on an irreversible decomposition of said hydroxide; and

wherein irreversible decomposition of the hydroxide forms a thermal insulation oxide layer around the flight data recorder.

2. An article of manufacture according to claim 1, wherein the means for supporting said hydroxide comprises a retaining matrix, packaging, encapsulation, micro encapsulation, enclosure or structure.

3. An article of manufacture according to claim 1, wherein the means for supporting said hydroxide is a closed container in which said hydroxide is located.

4. An article of manufacture according to claim 3, wherein said hydroxide lines an inner wall of the closed container.

5. The article of manufacture according to claim 1, wherein said flight data recorder is located within and spaced from said hydroxide.

6. An article of manufacture according to claim 1, wherein said hydroxide is adhered to a flexible substrate, said flexible substrate being of sufficient flexibility to conform to the size and shape of a heat sensitive device in thermal communication with said hydroxide.

7. An article of manufacture according to claim 1, wherein said hydroxide is a mixture of at least two of Lithium Hydroxide, Sodium Hydroxide, Potassium Hydroxide, Magnesium Hydroxide, Calcium Hydroxide, Beryllium Hydroxide, Aluminum Hydroxide, and Ammonium Hydroxide.

8. An article of manufacture according to claim 1, further comprising at least one layer of insulation placed between said heat sensitive device and said support means.

9. An article of manufacture according to claim 1, further comprising at least one layer of insulation placed between said support means and a source of heat.

10. An article of manufacture according to claim 1, further comprising a hermetic seal surrounding said support means.

11. An article of manufacture according to claim 10, wherein said hermetic seal includes a vent.

12. An article of manufacture according to claim 1, wherein said hydroxide is Lithium Hydroxide.

13. An article of manufacture according to claim 1, wherein said hydroxide is Sodium Hydroxide.

14. An article of manufacture according to claim 1, wherein said hydroxide is Potassium Hydroxide.

15. An article of manufacture according to claim 1, wherein said hydroxide is Magnesium Hydroxide.

16. An article of manufacture according to claim 1, wherein said hydroxide is Calcium Hydroxide.

17. An article of manufacture according to claim 1, wherein said hydroxide is Beryllium Hydroxide.

18. An article of manufacture according to claim 1, wherein said hydroxide is Aluminum Hydroxide having a formula of Al(OH)₃,

19. An article of manufacture according to claim 1, wherein said hydroxide is Ammonium Hydroxide.

20. An article of manufacture for heat absorption, comprising:

(a) a flight data recorder that includes electronics that are sensitive to heat;

(b) hydroxide having a formula of M_x(OH)_y, wherein “

M”

is selected from the group consisting of lithium, sodium, potassium, magnesium, calcium, beryllium, aluminum and ammonium, and wherein “

x” and

“

y”

are integers, said hydroxide being provided in an amount sufficient to effect a level of heat absorption so as to protect the electronics within the flight data recorder from damage upon exposure to a predetermined level of heat exposure, said hydroxide being formed into an endothermic structure that is configured and dimensioned for heat absorption positioning with respect to the flight data recorder and is effective to absorb said level of heat at least in part based on an irreversible decomposition of said hydroxide;

wherein irreversible decomposition of the hydroxide forms a thermal insulation oxide layer around the flight data recorder.

21. An article of manufacture according to claim 20, wherein said hydroxide is a mixture of at least two of Lithium Hydroxide, Sodium Hydroxide, Potassium Hydroxide, Magnesium Hydroxide, Calcium Hydroxide, Beryllium Hydroxide, Aluminum Hydroxide, and Ammonium Hydroxide.

22. In combination:

(a) a heat absorbing control device that includes hydroxide in an amount to effect a level of heat absorption, said hydroxide having a formula of M_x(OH)_y, wherein “

M”

is selected from the group consisting of lithium, sodium, potassium, magnesium, calcium, beryllium, aluminum and ammonium, and wherein “

x” and

“

y”

are integers; and

(b) a flight data recorder that includes electronics that are sensitive to heat in thermal communication with said heat absorbing control device;

wherein said hydroxide is supported in relation to said heat sensitive device, and wherein said hydroxide effects said level of heat absorption that is sufficient to protect the electronics within the flight data recorder from damage at least in part based on an irreversible decomposition of said hydroxide and wherein irreversible decomposition of the hydroxide forms a thermal insulation oxide layer around the flight data recorder.

23. A combination according to claim 22, wherein said heat absorbing control device includes a support means for supporting said hydroxide in relation to said heat sensitive device.

24. A combination according to claim 22, wherein said hydroxide is a mixture of at least two of Lithium Hydroxide, Sodium Hydroxide, Potassium Hydroxide, Magnesium Hydroxide, Calcium Hydroxide, Beryllium Hydroxide, Aluminum Hydroxide, and Ammonium Hydroxide.