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:
Feb. 14, 1995
Filed:
Jun. 24, 1992
Sadao Hokari, Katsuta, JP;
Kiyoshi Nakamura, Katsuta, JP;
Hiromi Inaba, Katsuta, JP;
Yoshio Sakai, Ibaraki, JP;
Hideaki Takahashi, Katsuta, JP;
Seikichi Masuda, Hitachi, JP;
Takei Ando, Ibaraki, JP;
Toshiaki Kurosawa, Katsuta, JP;
Akihiro Nokita, Mito, JP;
Masahiro Konya, Katsuta, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Building Systems Engineering And Service Co., Ltd., Tokyo, JP;
Abstract
An elevator system which is provided with power converters, electric motors supplied with power from the power converters, and a torque distributing section having functions for determining allocation of output power from the power converters on the basis of a required torque, by which an elevator is operated on the basis of functions selected in accordance with the operation mode. The system is able to save power in the elevator operation and also improve control functions and increase system capacity.