Patents by Inventor Risto Kajan

Risto Kajan 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).

  • Publication number: 20080204976
    Abstract: The invention relates to a fastening arrangement for fastening a switching device to a mounting tray, the fastening arrangement comprising a fastening point (12) formed in the switching device or the like, and a lug (10) to be fastened to the fastening point (12). The fastening point comprises at least three recesses (16) to receive the protrusion (24) in the lug (10) in such a way that the lug (10) is optionally lockable, when being fastened to the switching device, to different positions defined by the recesses (16), one of the positions being a substantially vertical position, another being a substantially horizontal position, and the rest being positions at an angle between these positions.
    Type: Application
    Filed: January 18, 2005
    Publication date: August 28, 2008
    Applicant: ABB OY
    Inventors: Harri Mattlar, Rainer Kolmonen, Juho Salo, Osmo Pikkala, Aki Suutarinen, Jarkko Alanen, Risto Kajan
  • Patent number: 7365622
    Abstract: This publication discloses a switching device combination for capacitive loads (3) connected to a direct voltage. The switching device combination includes an actual switch component (1) for connecting voltage to the capacitive load (3), a charging switch component (2) for connecting charging voltage to the capacitive load in the initial stage, which charging switch component is dimensioned for a lower current than the actual switch component (1), a controller component (4), by means of which the actual switch component (1) is controlled from an open state to a closed state and vice versa, with the aid of a mechanical lever (5), which is connected to a first shaft (6), and delay elements (11) for delaying the connection of the actual switch component (1), so that the closed charging switch component (2) will have time to charge the capacitive load (3) before the connection of the actual switch component (1).
    Type: Grant
    Filed: November 3, 2004
    Date of Patent: April 29, 2008
    Assignee: ABB OY
    Inventors: Risto Kajan, Erkki Rajala, Mikael N{dot over (a)}hls, Simo Pöyhönen, Martti Varpela, Markku Talja
  • Publication number: 20070035909
    Abstract: This publication discloses a switching device combination for capacitive loads (3) connected to a direct voltage. The switching device combination includes an actual switch component (1) for connecting voltage to the capacitive load (3), a charging switch component (2) for connecting charging voltage to the capacitive load in the initial stage, which charging switch component is dimensioned for a lower current than the actual switch component (1), a controller component (4), by means of which the actual switch component (1) is controlled from an open state to a closed state and vice versa, with the aid of a mechanical lever (5), which is connected to a first shaft (6), and delay elements (11) for delaying the connection of the actual switch component (1), so that the closed charging switch component (2) will have time to charge the capacitive load (3) before the connection of the actual switch component (1).
    Type: Application
    Filed: November 3, 2004
    Publication date: February 15, 2007
    Inventors: Risto Kajan, Erkki Rajala, Mikael Nahls, Simo Poyhonen, Martti Varpela, Markku Talja