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. 09, 1987
Filed:
Dec. 10, 1984
Applicant:
Inventors:
Heimo Makinen, Hyvinkaa, FI;
Matti Kahkipuro, Hyvinkaa, FI;
Assignee:
Elevator GmbH, Baar, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ; B66B / ;
U.S. Cl.
CPC ...
318380 ; 318381 ; 318370 ; 363 37 ; 187120 ;
Abstract
A method and apparatus for controlling a direct current motor of an elevator during emergency braking by conducting a current generated by the motor through a braking resistor are disclosed, in which a semiconductor switch connects the braking resistor across the motor during the emergency braking and a mains voltage to the motor is simultaneously interrupted.
Makinen, Heimo. (1987). Elevator motor control (U.S. Patent No. 4672277). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4672277
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile