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:
Mar. 16, 1993
Filed:
Sep. 10, 1991
Masayuki Shigeta, Katsuta, JP;
Tadashi Shibata, Ibaraki, JP;
Jun Sugahara, Katsuta, JP;
Toshihiko Nara, Katsuta, JP;
Kiyoyasu Mitsumori, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An elevator apparatus includes guide devices having guide members engaged with a pair of guide rails so as to guide a car along the guide rails in a manner to hold the car in a proper position. Each of the guide devices includes a resilient support member having a small spring constant supporting the guide member in such a manner that the guide member is movable in a direction perpendicular to a plane of the guide rail. An axis of suspension of the car is deviated from a position of a center of gravity of the car so as to cause a guide load, acting on a side surface of the guide rail via the guide member in a direction perpendicular to the plane of the guide rail, to have a deflected load acting on the guide rail in one direction. The guide device further includes an anti-deflected load generating device for generating an anti-deflected load in a direction to reduce a deflected load component of the guide load produced by the above deviation. With this arrangement, a lateral vibration of the car, which would be caused by an inherent bending of the guide rail, or a bending of the guide rail due to an error in installation of the guide rail or aging, is prevented.