Brake operation management in elevators

US10538412B2 · kind B2 · utility

Assignee

• OTIS ELEVATOR COMPANY · US

Inventors

• Amir Lotfi · Redondo Beach, US
• Randall Keith Roberts · Amston, US
• Ronnie E. Thebeau · Haddam, US
• Michael Garfinkel · Town of West Hartford, US
• Edward Piedra · Holyoke, US
• Dennis Hanvey · Leonardo, US
• Daniel Rush · Canton, US

Key dates

• Filing date: Mar 7, 2019
• Grant date: Jan 21, 2020
• Expiry date: Mar 7, 2039

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B66B9/00
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A method includes determining that an elevator car is arriving at a landing at which re-leveling is anticipated; upon the elevator car arriving at the landing at which re-leveling is anticipated, initiating the at least one of a brake cycling operation and a power cycling operation to reduce elevator car sag at the landing; monitoring transfer of weight to or from the elevator car at the landing over a period of time; terminating the at least one of the brake cycling operation and the power cycling operation upon at least one of (i) the transfer of weight to or from the elevator car at the landing over the period of time being less than a threshold and (ii) the elevator car sag at the landing meeting a sag threshold.