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. 11, 1992
Filed:
Aug. 29, 1990
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B66B / ;
U.S. Cl.
CPC ...
187 95 ; 187 / ; 187115 ;
Abstract
An elevator apparatus provided with a guiding device for guiding a passenger cage without vibration with respect to the guide rails. Sensors are provided so that a pressure applied to the guiding device from the guide rails is maintained constant, and an actuator is driven by an output of the sensor. The sensor may be a pressure sensor and, as the output of the sensor increases, the distance between the guide rail and the passenger cage is controlled in a manner so as to be decreased. The guiding device immediately follows the bend of the guide rail and an unbalanced load of the passenger cage so that transversal vibration of the passenger cage is considerably reduced.