Road structure – process – or apparatus – Traffic director – Yielding
Reexamination Certificate
2007-07-09
2009-10-06
Hartmann, Gary S (Department: 3671)
Road structure, process, or apparatus
Traffic director
Yielding
C404S034000, C188S376000, C188S377000
Reexamination Certificate
active
07597502
ABSTRACT:
A block of compressible material, such as cellular concrete, provides compressive failure characteristics suitable for arresting travel of an aircraft (or other vehicle) overrunning a runway (or other surface). 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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‘Innovative Financing Backs Highway Project’Civil Engineering, Civil Engineering ASCE New York, vol. 68(10), Oct. 1, 1998, p. 14.
‘Cellular Concrete Stops Airplanes in Their Tracks’Civil EngineeringOct. 1998, pp. 14, 16.
Allen Glenn
Angley Richard D.
Gordon John L.
Mahal Peter T.
Valentini Silvia C.
Engineered Arresting Systems Corporation
Hartmann Gary S
Kilpatrick & Stockton LLP
Russell Dean W.
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