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:
Nov. 19, 1985
Filed:
Sep. 01, 1982
Hiromi Inaba, Katsuta, JP;
Seiya Shima, Katsuta, JP;
Takeki Ando, Naka, JP;
Toshiaki Kurosawa, Katsuta, JP;
Yasunori Katayama, Hitachi, JP;
Takanobu Hatakeyama, Katsuta, JP;
Sadao Hokari, Katsuta, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An elevator controller which uses an acceleration command signal that has as its initial value a start shock compensation torque which will offset the unbalance torque caused at the time of starting. From the completion of elevator car acceleration to the start of deceleration, the acceleration command is gradually increased or decreased to control the motor so as to provide a smoother motion of the car. After the inception of the car deceleration a velocity command is issued which decreases with the reducing distance between the car and the destination floor.