Patents by Inventor Ari PIKIVIRTA

Ari PIKIVIRTA 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).

  • Fully adjustable brake controller without need of DC-link
    Patent number: 10189675
    Abstract: An adjustable brake controller of an elevator brake including a DC bus, first terminals for connecting the brake controller to a first magnetizing coil, second terminals for connecting the brake controller to a second magnetizing coil, a first controllable power switch coupled between the first terminals and the DC bus, the first controllable power switch being configured to supply electric power from the DC bus to the first magnetic coil responsive to a first control signal, a second controllable power switch coupled between the second terminals and the DC bus, the second controllable power switch being configured to supply electric power from the DC bus to the second magnetizing coil responsive to a second control signal, and a controller configured to generate the first and the second control signals for controlling the first and second power switches, respectively, with a brake open mode and a brake holding mode.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: January 29, 2019
    Assignee: Kone Corporation
    Inventors: Henri Wenlin, Tuukka Korhonen, Lauri Stolt, Ari Pikivirta, Arto Nakari
  • FULLY ADJUSTABLE BRAKE CONTROLLER WITHOUT NEED OF DC-LINK
    Publication number: 20170253460
    Abstract: An adjustable brake controller of an elevator brake comprises a DC bus; first terminals for connecting the brake controller to a first magnetizing coil; second terminals for connecting the brake controller to a second magnetizing coil; a first controllable power switch coupled between the first terminals and the DC bus, the first controllable power switch being configured to supply electric power from the DC bus to the first magnetic coil responsive to a first control signal; a second controllable power switch coupled between the second terminals and the DC bus, the second controllable power switch being configured to supply electric power from the DC bus to the second magnetizing coil responsive to a second control signal; and a controller configured to generate the first and the second control signals for controlling the first and second power switches, respectively.
    Type: Application
    Filed: February 6, 2017
    Publication date: September 7, 2017
    Applicant: Kone Corporation
    Inventors: HENRI VAKKAMAKI, Tuukka KORHONEN, Lauri STOLT, Ari PIKIVIRTA, Arto NAKARI