Controlled dosing of liquid cryogen

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12031680
SERIAL NO

18425621

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Abstract

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An aseptic liquid cryogen dosing head has a liquid cryogen reservoir in communication with a dosing outlet. An electromagnetic actuator is attached to an upper end of a dosing valve stem and is operable to move the dosing valve stem to open and close the dosing outlet. An air-tight seal extends about the dosing valve stem and separates the liquid cryogen reservoir from a cavity between the seal and the electromagnetic actuator. A controller is operable to perform a head leakage test, including pressurizing the cavity with a pressure higher than a pressure within the reservoir, to check for leakage past the seal; and pressurizing the reservoir to check for leakage from the liquid cryogen reservoir.

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Patent Owner(s)

Patent OwnerAddress
VACUUM BARRIER CORPORATION4 BARTEN LANE WOBURN MA 01801

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ross, John Walker Ipswich, US 1 0
Showers, Erik Robert Boxford, US 1 0
Tucker, David Groveland, US 33 574

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