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US Patent: 5,763,764
Evaporative Emission Tester
Patentees:
Daniel Mieczkowski (exact or similar names) - Kenosha, WI
Mark J. Hasenberg (exact or similar names) - Kenosha, WI
Thomas P. Becker (exact or similar names) - Kenosha, WI
Matthew M. Crass (exact or similar names) - Kenosha, WI
Robert D. Braun (exact or similar names) - Kenosha, WI
Edward T. Gisske (exact or similar names) - Mount Horeb, WI
Donald J. Caldwell (exact or similar names) - Milwaukee, WI

USPTO Classifications:
73/118.1, 73/40, 73/49.7, 73/861.42

Tool Categories:

Assignees:
Snap-On Technologies, Inc. - Lincolnshire, IL

Manufacturer:
Not known to have been produced

Witnesses:
none listed

Patent Dates:
Applied: Nov. 22, 1995
Granted: Jun. 09, 1998

Patent Pictures:
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Snap-On Tools Company History
Description:
Emrich & Dithmar - patent attorneys

Abstract

An evaporative emission tester is used to evaluate the integrity of a vehicle's evaporative emission control system, including determining the system's purge capability. The emission tester performs a purge flow test to determine whether fuel vapor stored in the vehicle's evaporative canister and present in the fuel tank is being drawn into the engine for combustion at a minimum amount. The emission tester also performs a pressure test of the vehicle's evaporative canister purge system, which includes the fuel tank and lines. The emission tester can function as a stand-alone unit or as an integrated product with a host computer.

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