The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 03, 2023
Filed:
Apr. 25, 2022
Kabushiki Kaisha Toshiba, Minato-ku, JP;
Toshiba Materials Co., Ltd., Yokohama, JP;
Tomohiro Yamashita, Yokohama, JP;
Takahiro Kawamoto, Kawasaki, JP;
Tomoko Eguchi, Yokohama, JP;
Takashi Kuboki, Ota, JP;
Kabushiki Kaisha Toshiba, Minato-ku, JP;
TOSHIBA MATERIALS CO., LTD., Yokohama, JP;
Abstract
A two-stage heat regenerating cryogenic refrigerator may include: a vacuum vessel; a first and second cylinder in the vessel; the second cylinder coaxially connected to the first cylinder; a 1regenerator in the first cylinder and accommodating heat regenerating material (HRM) 1; and a second regenerator in the 2cylinder accommodating HRM 2, HRM 2 including HRM particles, each HRM particle including a metal element and a heat regenerating substance including an oxide or oxysulfide and having a maximum specific heat at ≤20 K of ≥0.3 J/cm·K; each HRM particle including a 1and 2region, the 2region being closer to each HRM particle's outer edge than the 1, and the 2region having a higher metal element concentration than the 1, the 1and 2region containing the heat regenerating substance.