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. 26, 1999
Filed:
Dec. 16, 1996
Applicant:
Inventors:
Masanori Tawada, Tokyo, JP;
Yoshikatsu Hayashi, Tokyo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B66B / ;
U.S. Cl.
CPC ...
187316 ; 49 28 ;
Abstract
An elevator door control apparatus according to the present invention includes a driver for driving an elevator door; a torque detector, connected to the driver, for detecting torque command values during driving and the maximum torque command value; a standard door memory; an optimal door speed calculator for calculating an optimal door speed from the standard door values stored in memory and from the torque command values detected by the torque detector; and a door speed command for outputting a speed command signal to the driver, based on the door speed calculated by the optimal door speed calculator.