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. 11, 2022
Filed:
Jan. 23, 2018
Nippon Otis Elevator Company, Tokyo, JP;
Meidensha Corporation, Tokyo, JP;
Mitsuru Kato, Inzai, JP;
Hirotomo Tanaka, Chiba, JP;
Takashi Takeuchi, Tokyo, JP;
Ryuji Onoda, Chiba, JP;
Yusuke Watabe, Tokyo, JP;
Yoshiki Nota, Tokyo, JP;
Kazuaki Chida, Tokyo, JP;
NIPPON OTIS ELEVATOR COMPANY, Tokyo, JP;
MEIDENSHA CORPORATION, Tokyo, JP;
Abstract
During a maintenance inspection, an optical rope diameter measuring device is provided at a predetermined position along a path of a wire rope, rope diameter is measured at multiple measuring points while the elevator is driven in test mode, and diameter reduction at each measuring point is determined and stored as a first diameter reduction (S_S). During a subsequent maintenance inspection, rope diameter is similarly measured at each measuring point to determine diameter reduction constituting a second diameter reduction (S_S). Based on these two diameter reductions, the time at which diameter reduction will reach a predetermined threshold value is predicted for each measuring point, and the earliest time is displayed as a rope replacement time (S_S).