Ignition interlock breathalyzer

Abstract

The invention relates to an improvement in a breath alcohol test devices includes within the handheld unit containing a fuel cell, a miniaturized self calibrating test device thereby avoiding the need for 30, 60 and 90 day calibration testing. It also relates to various tamper or circumvention improvements that may be used alone or in combination with the self calibration improvement, including cameras to record a driver providing a breath sample and to verify the location of the driver within a vehicle.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of U.S. Ser. No. 12 / 504,714 filed Jul. 17, 2009, which claims priority under 35 U.S.C. §120 to provisional application Ser. No. 61 / 081,594 filed Jul. 17, 2008, herein incorporated by reference in its entirety.FIELD OF THE INVENTION[0002]This invention relates to a breath alcohol ignition interlock device. Before the vehicle can be started, the driver must breathe into the device. If the analyzed blood alcohol result is over a programmed blood alcohol concentration, commonly 0.02% or 0.04%, the vehicle cannot be started.BACKGROUND OF THE INVENTION[0003]Analyzing devices, used to determine the blood alcohol content of those about to drive vehicles, are commonly available. They emanated from breathalyzers used by law enforcement to test whether or not a driver was intoxicated, i.e., over the legal limit. In more recent times this traditional use of breathalyzing devices has been enhanced by combining a brea...

AI Technical Summary

Benefits of technology

[0018]The invention relates to an improvement in a breath alcohol test devices that include within the handheld unit a fuel cell and a miniaturized self calibrating test device for the fuel cell thereby avoiding the need for 30, 60 and 90 day calibration testing. It also relates to various tamper proof or circumvention improvements that may be used alone or in combination with the self calibration improvement.

[0020]According to another embodiment of the present invention a breath alcohol test device that has a breath tube, a fuel cell chamber in selective communication with the breath tube, and a pump for moving breath is improved by including a miniaturized Guth bath that periodically tests a headspace above a known-concentration alcohol sample to test the accuracy of allow self-calibration of the alcohol test device. The known-concentration alcohol sample may be provided within a sponge. The fuel cell chamber may include an outlet in communication with the pump and an inlet in communication with a control valve that can be adjusted to connect the inlet with the breath tube to test a breath sample and to connect the inlet with the headspace to perform a calibration test.

[0022]According to another embodiment of the invention, a vehicle interlock breathalyzer system that includes a handheld part with a breath sample collection and testing unit and a relay box part in connection with an electrical system of a vehicle to impede operation of the vehicle if an acceptable breath sample is not provided to the breath sample collection and testing unit, is improved by including: an electrical circuit within the relay box that detects the polarity of an ignition circuit of the vehicle, and a computer processor within the relay box that adjusts the relay box operation in accordance with the detected polarity.

Problems solved by technology

Both parts of the device offer opportunities for mischief, if one is inclined to try and beat the device and forestall court penalty sanctions, etc.

Calibration is expensive, and depending on the device, it needs to occur every 30, 60 or 90 days.

While necessary problems with calibration involve time consumption, expense of distant travel that may be necessary, inconvenience discourages expense and the travel to maintain integrity and the user's knowledge that lack of an adequately calibrated machine may make the evidence it collects inadmissible in court discourages the effort.

This would save money, time and expense of all concerned.

Yet another problem with alcohol ignition interlock devices is constant user circumvention by imposter fraud.

Therefore it even further frustrates circumvention efforts.

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