US Patent 7389722 Gas flush mixing system and method
Patent 7389722 was granted and assigned to Fresh Express on June, 2008 by the United States Patent and Trademark Office.
All edits
A gas mixing system and method designed to flush produce with a gas-air mixture of desired oxygen concentration to preserve the produce. The produce is placed in a vacuum vessel, which is then evacuated to a desired degree. Atmospheric air is provided to the vacuum vessel via an air valve, and nitrogen gas is provided to the vacuum vessel via a gas valve. A valve controller operates in a first mode wherein the air valve is a fully open master valve and the gas valve is a partially or fully open slave valve, and operates in a second mode wherein the gas valve is a fully open master valve and the air valve is a partially or fully open slave valve. The system automatically switches between the two modes to accommodate changing conditions, to maintain the desired oxygen concentration in the gas-air mixture. Multiple modes are possible with greater numbers of valves.
US Patent 07389722 Gas flush mixing system and method US Patent 7389722 Gas flush mixing system and method
US Patent 07389722 Gas flush mixing system and method
Find more entities like US Patent 7389722 Gas flush mixing system and method
