Road structure – process – or apparatus – Traffic director – Yielding
Reexamination Certificate
2005-12-06
2005-12-06
Hartmann, Gary S. (Department: 3671)
Road structure, process, or apparatus
Traffic director
Yielding
C404S034000, C404S071000, C188S377000
Reexamination Certificate
active
06971817
ABSTRACT:
Aircraft arresting beds constructed of cellular concrete at ends of runways may be subject to damaging effects of jet blast phenomena. Arresting units resistant to such effects are described. A block of compressible material, such as cellular concrete, provides compressive failure characteristics suitable for arresting travel of an aircraft overrunning a runway. Relatively thin frangible material positioned above the block provides a stronger, more damage resistant surface, while still readily fracturing in an arresting incident. Intermediate material, such as a foam layer, positioned under the frangible material may be included to provide a protective cushioning effect by mitigating transmission of external phenomena forces to the block. A fastening configuration at least partially enclosing other portions of the arresting unit provides a stable unified composite, without destroying desired compressive failure characteristics of the unit. Arresting units may also include a bottom layer of material stronger than the block of compressible material and a sealant coating with water resistant properties.
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Allen Glenn
Angley Richard D.
Gordon John L.
Mahal Peter T.
Valentini Silvia C.
Engineered Arresting Systems Corporation
Hartmann Gary S.
Robinson Kenneth P.
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