Patents by Inventor Juha-Matti Aitamurto

Juha-Matti Aitamurto 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).

  • Safety arrangement, elevator system, frequency converter and a method for monitoring electrical safety in an elevator system
    Publication number: 20150210506
    Abstract: A safety arrangement of an elevator and a method for monitoring electrical safety in an elevator system is disclosed. The safety arrangement of an elevator includes a motor drive of the elevator, which motor drive includes a main circuit, an accessible conducting part, which is earthed, an insulator, which is adapted to electrically insulate the aforementioned conducting part from the aforementioned main circuit and also a monitoring circuit, which is configured to determine an earth fault of the aforementioned main circuit occurring via the aforementioned conducting part. The monitoring circuit is configured to form a signal indicating the danger of electric shock in the motor drive of the elevator, if the aforementioned earth fault is diagnosed.
    Type: Application
    Filed: April 3, 2015
    Publication date: July 30, 2015
    Applicant: KONE CORPORATION
    Inventors: Ari Kattainen, Juha-Matti Aitamurto, Lauri Stolt