Thermal retracting actuator

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9714644
SERIAL NO

14886438

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Abstract

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A thermal actuator for a rotating shaft shutdown seal that has a piston with a portion of its axial length enclosed within a chamber shell with a material that expands upon a rise in temperature. The portion of the actual length of the piston within the chamber has at least two different diameters with the larger diameter leading in the direction of travel of the piston. Upon a rise in temperature, expansion of the material surrounding the piston within the chamber creates a force on the piston in the desired direction of travel. Below a preselected temperature the piston is positively locked with a passive release when the preselected temperature is reached.

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Patent Owner(s)

Patent OwnerAddress
WESTINGHOUSE ELECTRIC COMPANY LLC1000 WESTINGHOUSE DRIVE SUITE 141 CRANBERRY TOWNSHIP PA 16066

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Conrad, John W Butler, US 3 6
Hawkins, Phillip J Irwin, US 34 406
Hodgson, Judith E Irwin, US 7 45
Petrosky, Lyman J Latrobe, US 30 213

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