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. 06, 2026
Filed:
Apr. 22, 2021
Mitsubishi Electric Corporation, Tokyo, JP;
Takehiko Kubota, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
A landing-door switch circuit according to the present disclosure includes an upper-car safety circuit, an upper-car auxiliary circuit, a lower-car safety circuit, and a lower-car auxiliary circuit. The upper-car safety circuit and the lower-car safety circuit connect excitation coils of switching devices of a power supply for driving an upper car and a lower car, respectively, and a power supply, and include main circuits in which landing-door switches are connected in series, and first connection units and third connection units branched from the main circuits. The upper-car auxiliary circuit and the lower-car auxiliary circuit include a second connection unit and a fourth connection unit on the lower car and the upper car, respectively, to bypass the landing-door switches.