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. 08, 1991
Filed:
Nov. 07, 1989
Noboru Arabori, Katsuta, JP;
Hideaki Takahashi, Katsuta, JP;
Yoshio Sakai, Ibaraki, JP;
Tsutomu Sano, Katsuta, JP;
Masao Nakazato, Katsuta, JP;
Masakatsu Tanaka, Katsuta, JP;
Katutaro Masuda, Katsuta, JP;
Mitsuo Saito, Katsuta, JP;
Yuji Toda, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An elevator apparatus includes an electric motor for driving the elevator apparatus, an elevator cage adapted to be lifted or lowered by the electric motor, a brake device for holding and retaining an elevator driving system, including the electric motor, and a malfunction detecting device responsive to the application of a torque to a retainer section of the brake device during the lifting or lowering of the elevator cage.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile