Patents by Inventor Don Afman

Don Afman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • System for control and deceleration of elevator during emergency braking
    Patent number: 6802395
    Abstract: A system for controlling the braking of an elevator car during an emergency. When there is a power failure or other emergency, a brake is applied to slow the elevator car to a stop in a controlled fashion. By Controlling the braking, the car is stopped in a short time but without discomfort to the passengers. The controller receives inputs from the rope movement, motor movement, temperature and the braking current to correctly determine the amount of braking which should be applied.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: October 12, 2004
    Assignee: Kone Corporation
    Inventors: Brad Helstrom, Don Afman, John Weber