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:
Jan. 04, 1994
Filed:
Aug. 06, 1991
Michio Goto, Yokohama, JP;
Yoshikazu Ishijima, Nagoya, JP;
Otis Elevator Company, Farmington, CT (US);
Abstract
In this invention, a provision is made for a means for detecting the voltage or current of a dynamic brake regenerative (DBR) circuit for determining whether the DBR circuit is properly functioning in an elevator system in which a DBR circuit for controlling the regenerative electrical power is connected between the input terminals of an inverter working as an electrical power source for an alternating current electric motor for driving an elevator car, so that the operation of the DBR circuit is automatically checked immediately before operating an elevator, preventing the occurrence of an abnormal situation caused by unabsorbed regenerative electrical power.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile