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:
Feb. 24, 2026
Filed:
Apr. 21, 2022
Hitachi, Ltd., Tokyo, JP;
Naohiro Ikeda, Tokyo, JP;
Kotaro Shimamura, Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
The safety device includes a plurality of arithmetic units which output an arithmetic result of input data as arithmetic data in each control period, a first comparison unit which compares information indicating the control period at a timing at which each of the plurality of arithmetic units outputs the arithmetic data, a plurality of temporary storage units which hold the arithmetic data output by the plurality of arithmetic units, a second comparison unit configured to compare the arithmetic data held by the plurality of temporary storage units, and an output unit configured to output the arithmetic data to outside. Each of the plurality of temporary storage units outputs the arithmetic data held therein according to a comparison result from the first comparison unit, and the output unit outputs the arithmetic data output by the temporary storage units to the outside according to a comparison result from the second comparison unit.