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, 2002
Filed:
Jul. 12, 2001
Applicant:
Inventor:
Masao Iwasa, Chiba-ken, JP;
Assignee:
Otis Elevator Company, Farmington, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B66B 1/28 ;
U.S. Cl.
CPC ...
B66B 1/28 ;
Abstract
A single inverter ( ) provides variable frequency, variable voltage current output ( ) to either a hoist motor ( ) or a door motor ( ), depending on the operating mode of the elevator car ( ). A controller ( ) provides an input signal ( ) to an actuator ( ) for switching the output current ( ) between the motors ( ) by a relay switch ( ). The controller ( ) includes separate control profiles depending upon which motor ( ) is connected to the inverter ( ).