Road spike device

Details Road spike device Road spike device

1999-02-24

2000-04-11

Lisehora, James A.

Road structure, process, or apparatus

Traffic steering device or barrier

256 131, E01F 1300

Patent

active

060481285

ABSTRACT:
A road spike device useful for deflating the tires of a fleeing or trespassing vehicle for the purpose of halting the vehicle. The road spike device preferably comprises a plurality of support arms and connected base members that are pivotally and replaceably secured to one another in a lazy tong configuration. A plurality of frangible cups are carried in spaced relation on the support arms. A hard rigid spike, adapted to allow air to flow through the spike, is carried by each of the frangible cups in a tight frictional fit such that spike is not readily removeable from frangible cup. As a vehicle tire (not shown) rolls onto the spike, the tire is impaled by the spike. As the tire progresses over the support arm with the spike embedded in the tire, the spike begins to rotate, relative to the axis of the frangible cup, creating a force moment against the outer lip of the frangible cup. This force moment causes the frangible cup to crumble, thus freeing the spike which remains embedded in the vehicle tire and deflates the vehicle tire. The spike of the preferred embodiment has a solid tapered tip and includes an elongated body, a shank, and a shoulder. The shank of the spike is provided with a concentric axial bore. An axial groove is provided in the elongated body of the spike and is in fluid communication with the axial bore of the shank. The preferred spike is provided with a plurality of circumferential bevels proximate the tip to act as barbs.

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