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:
Apr. 27, 2010
Filed:
Apr. 28, 2004
Takuo Kugiya, Tokyo, JP;
Ken-ichi Okamoto, Tokyo, JP;
Takashi Yumura, Tokyo, JP;
Tatsuo Matsuoka, Tokyo, JP;
Takuo Kugiya, Tokyo, JP;
Ken-Ichi Okamoto, Tokyo, JP;
Takashi Yumura, Tokyo, JP;
Tatsuo Matsuoka, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An elevator apparatus has a car suspended by a main rope through the intermediation of a shackle spring. The car is equipped with a displacement sensor for measuring the displacement amount of the main rope with respect to the car. The displacement sensor is electrically connected to an abnormality control device mounted on the car. The abnormality control device obtains the magnitude of the tension of the main rope based on information from the displacement sensor, and selectively outputs a braking command signal to one of the following devices: an operation control device, a brake device, and an emergency stop device, according to the magnitude of the tension of the main rope.