Fire protection arrangement for temperature-sensitive, heat-producing article
First Claim
1. A fire-protection arrangement having a temperature-sensitive, heat-producing article, comprising:
- (a) an inner layer of an active endothermic material heat barrier for enclosing and contacting said temperature-sensitive, heat-producing article,(b) a multi-layered, vented, flexible, low-temperature heat-dissipating, high-temperature heat-blocking fire shield enclosing said inner layer, said fire shield comprising;
(1) a vented heat screen of sheet materials forming an external surface constituting a fire side of said heat screen and an opposite surface constituting an internal side of said heat screen,(2) a spacer producing a vented gap between said screen and said inner layer, said spacer comprising a three-dimensional lattice layer, said spacer being located between said heat screen and said inner layer at said internal side of said heat screen, and,(3) heat-conductive means for dissipating low-temperature internal heat through said gap and said heat screen to surroundings, said heat conductive means having a plurality of heat-conducting materials forming a heat conducting path for said internal heat between said inner layer and said external surface of said heat screen,(4) heat-convective means for dissipating low temperature internal heat through said gap and said heat screen to said surroundings, said heat-convective means comprising venting means for said heat screen for allowing air to circulate, by natural convection, from said surroundings to a surface of said inner layer, through said fire shield and back to said surroundings, and(5) heat-emissive means for dissipating low temperature internal heat to said surroundings, said heat emissive means comprising a heat-emissive material forming said external surface of said heat screen.
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Accused Products
Abstract
A temperature-sensitive, heat-producing article, such as an electric cable, is fire protected by a multi-layered, thin, light weight, and vented arrangement with enhanced low-temperature heat dissipation during normal operation and effective high-temperature heat blocking during a fire. It includes a. an inner layer of heat blocking material chosen from the class of reactive endothermic materials (14), b. a vented, thin, multilayered heat screen (10), c. a gap producing spacer (12), and d. in combination, enhanced conductive, convective, and radiating elements for heat dissipation at low temperatures (11, 12, 41, and 44). The screen (10) includes a plurality of alternating layers of porous, ultra-thin, high-temperature, non-wicking insulating fiber cloths, and high-temperature heat-reflecting metallic porous foils with a layer of metallic wire cloth on the outside, i.e, the side facing the fire. The inner side of the screen (10) is held separated from inner layer (14) by a gap-forming crimped metallic wire cloth (12). The inner layer (14) encloses and is in contact with the protected article (18). The outermost layer, a wire cloth, is connected, through the layers of the heat screen, to the metallic spacer by a plurality of heat conducting wire segments, establishing a heat dissipation path designed to disintegrate during a fire.
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Citations
35 Claims
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1. A fire-protection arrangement having a temperature-sensitive, heat-producing article, comprising:
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(a) an inner layer of an active endothermic material heat barrier for enclosing and contacting said temperature-sensitive, heat-producing article, (b) a multi-layered, vented, flexible, low-temperature heat-dissipating, high-temperature heat-blocking fire shield enclosing said inner layer, said fire shield comprising; (1) a vented heat screen of sheet materials forming an external surface constituting a fire side of said heat screen and an opposite surface constituting an internal side of said heat screen, (2) a spacer producing a vented gap between said screen and said inner layer, said spacer comprising a three-dimensional lattice layer, said spacer being located between said heat screen and said inner layer at said internal side of said heat screen, and, (3) heat-conductive means for dissipating low-temperature internal heat through said gap and said heat screen to surroundings, said heat conductive means having a plurality of heat-conducting materials forming a heat conducting path for said internal heat between said inner layer and said external surface of said heat screen, (4) heat-convective means for dissipating low temperature internal heat through said gap and said heat screen to said surroundings, said heat-convective means comprising venting means for said heat screen for allowing air to circulate, by natural convection, from said surroundings to a surface of said inner layer, through said fire shield and back to said surroundings, and (5) heat-emissive means for dissipating low temperature internal heat to said surroundings, said heat emissive means comprising a heat-emissive material forming said external surface of said heat screen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification