A system continuously drives a motor during normal and power failure operating conditions. A regenerative drive delivers power to the motor from a main power supply during the normal operating condition and from a backup power supply during the power failure operating condition. A controller operates the regenerative drive to provide available power on the regenerative …

Legal parties

Inventors (applicants): Frank Higgins, Vladimir Blasko, Ismail Agirman
Assignees (initial): Otis Elevator Company (Farmington, US)
Agents: Cantor Colburn LLP (attorney)

The application was examined by Anthony Salata (USPTO dept. 2837)


  • 1. A system comprising: …
  • 2. The system of claim 1 , wherein the regenerative drive further comprises: …
  • 3. The system of claim 1 , wherein the controller provides signals to the converter …

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Brief Description of the Drawings

FIG. 1 is a schematic view of a power system including a controller and a regenerative drive for continuously driving an elevator hoist during normal and power failure operating conditions. …



The present invention relates to the field of power systems. In particular, the present invention relates to an elevator power system including a regenerative drive operable to provide automatic rescue …

Cross-Reference to Related Application(s)

This continuation application claims priority from application Ser. No. 12/526,872, filed Aug. 12, 2009 and PCT Application Serial No. PCT/US2007/004000, filed Feb. 13, 2007, which are hereby incorporated by …

Detailed Description

FIG. 1 is a schematic view of a power system 10 including a controller 12 for driving hoist motor 14 of elevator 16 from main power supply 17 according to an embodiment …

More details about System and Method for Operating a Motor During Normal and Power Failure Conditions

Miscellaneous patent data

The patent was extended by 28 days, illustrated by 3 drawings, the recorded inventor's name is Ismail Agirman, the inventor's city is Farmington, state - CT, the grant number is 08789659 (publication number), the protection scope is defined by 23 claims, the assignee company is Otis Elevator Company located in Farmington (US), the claim 1 is exemplary as chosen by the examiner, categorized under With auxiliary supply of electricity as a primary classification, similar categories include Gates or other apparatus controlling access to, or exit from, cars, cages, or hoistway landings, Equalizes tension in, or length of, plural linking cables, Having means for final leveling, Safe lift clips, Keps, cars or cages, Plural fluid rams having interrelated operation, Includes variable weight, Elevators not provided for in groups B66B 1/00-B66B 19/00, Shifted by fluid ram, for varying the manner of operation to suit particular traffic conditions, e.g. "one-way rush-hour traffic", the known applicant's name is Blasko Vladimir, the applicant's location - Avon, CT, includes the following drawings: Schematic view of an automatic, Schematic view of the automatic, System and Method for Operating, Schematic view of a power, numbered 13/529,545 (application), the application publication date is Jun. 21, 2012, the patent was granted on Jul. 29, 2014, the assignee is categorized as a United States company, was examined by 2837 USPTO department, the examiner - Anthony Salata, the recorded agent's company name - Cantor Colburn LLP, the invention is named System and Method for Operating a Motor During Normal and Power Failure Conditions, invented by Ismail Agirman et al., the invention details are shown in 3 figures.

Invention classification information

The invention is classified under Limited to power source utilizing A.C. power, Regenerative, electric, With auxiliary supply of electricity. The designated search classifications include With auxiliary supply of electricity, Dynamic braking, Controls power source speed, Regenerative, Limited to power source utilizing A.C. power, Limited to power source utilizing D.C. power.

Patent details
Publication number 08789659
Publication date Jul. 29, 2014
Kind code B2
Application number 13/529,545
Application date Jun. 21, 2012
Application type U
Application series code 13
Extension term 28
National classification 187/290
Total number of claims 23
Exemplary claims 1
Number of drawings 3
Number of figures 3
Terminal disclaimer
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