Crash protection enclosure for solid state memory devices
First Claim
1. A crash survivable protective enclosure for flight data recorders, cockpit voice recorders and memory devices employing a solid state memory element, comprising:
- conformal coating means of air excluding plastic material surrounding said memory element;
inner shell means made of metal capable of acting as a sacrificial anode with respect to any tin and copper associated with said memory element when said enclosure is exposed to salt water;
first filler means around said inner shell comprising a wax-type material having a high latent heat of fusion to act as a heat sink for absorbing a high quantity of heat during a phase transition at an elevated temperature;
second filler means around said inner shell comprising a thermal insulation; and
outer shell means formed of high strength metal for resisting physical forces applied externally to said protective enclosure.
3 Assignments
0 Petitions
Accused Products
Abstract
A crash survivable protective enclosure for flight data recorders, cockpit voice recorders and memory devices employing a solid state memory element includes a conformal coating of air excluding plastic material around the memory element. An inner shell of metal having a low position on the periodic table in comparison to tin and copper associated with the memory element is provided to enclose the memory element and the conformal coating. Heat insulating fillers are provided around the inner metal shell which serves as a sacrificial anode when the enclosure is exposed to salt water. An outer metal shell formed of high strength material is provided around the insulating filler for resisting physical forces applied from an exterior of the protective enclosure during a crash.
65 Citations
23 Claims
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1. A crash survivable protective enclosure for flight data recorders, cockpit voice recorders and memory devices employing a solid state memory element, comprising:
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conformal coating means of air excluding plastic material surrounding said memory element; inner shell means made of metal capable of acting as a sacrificial anode with respect to any tin and copper associated with said memory element when said enclosure is exposed to salt water; first filler means around said inner shell comprising a wax-type material having a high latent heat of fusion to act as a heat sink for absorbing a high quantity of heat during a phase transition at an elevated temperature; second filler means around said inner shell comprising a thermal insulation; and outer shell means formed of high strength metal for resisting physical forces applied externally to said protective enclosure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A protective enclosure for electronic memory devices, comprising:
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conformal coating means of plastic resin surrounding a memory device for excluding air from the vicinity thereof; protective metal shell means enclosing said memory device and surrounding said coating means around an outer surface of said coating means, said shell means formed of metal capable of serving as a sacrificial anode with respect to any tin and copper associated with said memory element when said enclosure is subject to contact with a liquid electrolyte. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A protective enclosure for electronic memory devices, comprising:
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conformal coating means of plastic resin surrounding a memory device for excluding air from the vicinity thereof; protective metal shell means enclosing said memory device and surrounding said coating means around an outer surface of said coating means, said shell means formed of metal capable of serving as a sacrificial anode with respect to any tin and copper associated with said memory element when said enclosure is subject to contact with a liquid electrolyte; said metal shell means is formed with a vent opening, and including plug means of elastomeric material normally closing said vent opening against the ingress of substances entering exterior of said shell means.
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Specification