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:
Jun. 28, 1994
Filed:
Aug. 20, 1992
Applicant:
Inventors:
Ichiro Nakamura, Katsuta, JP;
Tsuyoshi Ogasawara, Ishioka, JP;
Masayuki Shigeta, Katsuta, JP;
Masakatsu Tanaka, Katsuta, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B66B / ;
U.S. Cl.
CPC ...
187109 ; 187 89 ; 188170 ;
Abstract
A braking apparatus is provided for an elevator which includes a cage, a counterweight, a main sheave, a motor for rotating the main sheave, a deflector sheave, and a rope wound around the main sheave and the deflector sheave, the rope extending from the cage to the counterweight. The braking apparatus comprises a first brake for the main sheave, and a second brake for the deflector sheave. Both brakes are controlled to apply an appropriate braking force to the cage in accordance with the load and the speed of the cage.