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:
Dec. 20, 2022
Filed:
Jul. 14, 2020
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Materials. Co., Ltd., Yokohama, JP;
Katsuhiko Yamada, Kanagawa, JP;
Keiichi Fuse, Kanagawa, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
TOSHIBA MATERIALS CO., LTD., Yokohama, JP;
Abstract
A reduction in a permeability of refrigerant gas is suppressed while increasing a filling factor of regenerator material particles with respect to a stage of a cold head. A cold head includes a stage including regenerator material particle groups, and a metal mesh material partitioning the regenerator material particle groups. The metal mesh material has quadrangular mesh holes each having a length of a long side of 1/10 or more and ½ or less of each of average particle sizes of the regenerator material particle groups.