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. 09, 2025
Filed:
Mar. 17, 2022
Hitachi, Ltd., Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
An elevator has a power outage operation function including an emergency stop device that is provided in the elevator car, and a drive mechanism that is configured to drive the emergency stop device. An electric actuator is configured to actuate the drive mechanism, and a control device is configured to control an operation of the car. The electric actuator includes a movable element mechanically connected to the drive mechanism, electromagnets facing the element, and a mechanism to convert rotation of a motor into linear movement of the electromagnets. When the control device determines that the electric actuator is actuated due to a power outage, the control device instructs the electric actuator to perform a return operation of returning the movable element to a standby position, and operates the car to move up and land on a nearest floor above a stop position of the car when the return operation fails.