US Patent: 5,763,764 - Evaporative Emission Tester


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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:

USPTO (New site tip)
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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.