Patents by Inventor Bradley John Helstrom

Bradley John Helstrom 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).

  • Elevator brake system method and control
    Patent number: 7434664
    Abstract: A rescue braking system provides a smoother elevator car movement by mechanically lifting or applying the brake. The rescue braking system incrementally adjusts the force applied to the brake based on the speed and location of the elevator car. Therefore, it can effectively eliminate the jerky vibration and noises caused by the fully on-off brake systems and make the passengers feel more comfortable when the elevator car drifts to the nearest floor door.
    Type: Grant
    Filed: March 8, 2005
    Date of Patent: October 14, 2008
    Assignee: Kone Corporation
    Inventor: Bradley John Helstrom