Method for producing a two-stage heat regenerating cryogenic refrigerator

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12140381
APP PUB NO 20230408207A1
SERIAL NO

18236766

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Abstract

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A method may produce a two-stage heat regenerating cryogenic refrigerator including a vacuum vessel, first and second cylinder disposed in the vessel, the second cylinder coaxially connected to the first cylinder, and first and second regenerator respectively disposed in the first and second cylinder. The method may include: accommodating a first heat regenerating material (HRM) in the first regenerator; and filling a plurality of HRM particles in the second regenerator. The HRM particles may be a second HRM, each of the HRM particles including an oxide or oxysulfide heat regenerating substance having a maximum value of specific heat at a temperature of ≤20 K of 0.3+ J/cm3·K and Ca, Mn, Mg, Be, Sr, Al, Fe, Cu, Ni, and/or Co. Each of the HRM particles may include a first and second region, the second region being closer to an HRM particle outer edge than the first region.

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Patent Owner(s)

Patent OwnerAddress
KABUSHIKI KAISHA TOSHIBAMINATO-KU TOKYO 105-8001

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Eguchi, Tomoko Yokohama, JP 51 435
Kawamoto, Takahiro Kawasaki, JP 56 147
Kuboki, Takashi Ota, JP 102 1276
Yamashita, Tomohiro Yokohama, JP 132 926

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