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. 16, 1998
Filed:
Nov. 04, 1996
Eric K Jamieson, Farmington, CT (US);
Daniel S Williams, Meriden, CT (US);
Otis Elevator Company, Farmington, CT (US);
Abstract
Methods and apparatus are provided which can reduce life cycle costs associated with wear on active horizontal suspension actuators for elevators and also reduce cost of such actuators. The method includes discriminating lateral movement of elevator due to car loading imbalance from that of movement due to building sway and operating the actuators only in the case of lateral movement due to car loading imbalance. The discriminating may comprise the steps of detecting a car position outside a deadband, and allowing changes in the actuators to counter the forces causing such positional changes only if the car position stays outside the deadband for more than a predetermined time, e.g., more than half the predetermined period of building sway, which is an architectural constant for a particular building.