Abstract: A vehicle tire deflation device includes a housing structure, a core structure, a plurality of spikes, a first end cap and a second end cap. The housing structure includes a first end and a second end. The core structure resides within the housing structure. The plurality of spikes is maintained by the core structure and positioned in a predetermined orientation. The predetermined orientation positions the spikes to penetrate a tire when a vehicle travels over the vehicle tire deflation device. Each end cap selectively attaches to the respective ends of the housing structure. Each end cap defines an opening and comprises an outer wall. Each of the openings communicates with the interior of the device so as to permit air to pass from the interior to the exterior of the device. Methods of using a vehicle tire deflation device are also described.

Abstract: A security system having a portable monitoring device in communication with detection devices and notification systems to provide messages. Methods for employing a portable monitoring device are also provided herein.

Abstract: A multiple use vehicle tire deflation device comprises a base, at least one cartridge removably secured to the base, and at least one vehicle tire deflating quill removably secured to the cartridge. The base, cartridge and quill are configured such that the quill, when imbedded by a vehicle tire rolling over the device, separates from the cartridge, whereas the cartridge remains secured to the base yet is readily removably replaceable. A replacement cartridge for a vehicle tire deflation device, which device includes a base, comprises a block, at least one tire deflating quill removably secured to the block, and structure on the block adapted to cooperate with the base of the tire deflation device to facilitate installation and removal of the block onto and from the base and to prevent the block from separating from the base when the quill becomes embedded in a vehicle tire rolling over the device.