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.

Abstract: A device for inserting rods into plastic forms comprising a frame, a plunger assembly coupled to the frame, an air cylinder assembly also coupled to the frame and to the plunger assembly, and a pneumatic plumbing assembly connected to the air cylinder assembly. The frame can be attached to a slipform paving or curbing machine. When actuated, the air cylinder assembly pulls the plunger along the frame. The plunger pushes a dowel rod resting in the frame along the frame and into a concrete member being extruded from the machine.