Patents by Inventor Keijo Lehikoinen

Keijo Lehikoinen 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).

  • Patent number: 5083448
    Abstract: An electromechanical door lock comprises a lock body (1), in which is a dead bolt (3) which can be dead locked in its protruding position and electrically withdrawn into the lock body, a latch (4) which is spring loaded to be protruding from the lock body and which centralizes the dead bolt in an opening in a striking plate (18) arranged for the door lock, and force transmission means (8-14) for transmitting force from an electrical operating device (7) to the dead bolt (3). Said latch (4) includes in a way known as such a body member (4c) moveable inside the lock body to which is jointed a wedge-shaped member (4a, 4b), protruding at least partly out from the lock body when the latch is in the protruding position, so that the latch (4) can be pressed inside the lock body when a force acts on said wedge-shaped member (4a, 4b) from either side of the lock body in the direction of the door opening or closing.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: January 28, 1992
    Assignee: Oy Abloy Security Ltd.
    Inventors: Vesa Karkkainen, Keijo Lehikoinen
  • Patent number: 4902053
    Abstract: The invention relates to a door lock, which comprises, a lock body (1) provided with a forend and including a latch bolt (3), which is removable between a retracted position and a protruding, locking position out from the lock body through an opening (2a) in the forend (2) and which is spring-loaded towards its said protruding position, and dead locking means turnable from a passive position into a dead locking position, in which they prevent removal of the latch bolt (3) from its said protruding position into its retracted position in the lock body (1). According to the invention the latch bolt (3) comprises a body of the latch bolt (3a) and a separate latch bolt member (3b).
    Type: Grant
    Filed: July 5, 1989
    Date of Patent: February 20, 1990
    Assignee: Oy Wartsila Ab
    Inventors: Reijo Hakkarainen, Keijo Lehikoinen, Paavo Piiroinen
  • Patent number: 4445299
    Abstract: The invention relates to an arrangement for obtaining an uninterrupted connection of an electric cable or the like between two elements pivotally hinged to each other, in particular, between a door frame element and a door connected thereto. The arrangement comprises, at the position of the connection, a member arranged around the cable in the form of a separate, turnable and longitudinally flexible protecting element. This element is arranged basically in the longitudinal direction of the door frame element and one end of the element is connected to the door frame element and the other end to an adjacent edge part of the door. There is, for said protecting element, in the door frame and/or in said door edge part, at least one recess. This recess is so arranged that, when the door is closed, the protecting element and said cable are received in this recess.
    Type: Grant
    Filed: February 19, 1981
    Date of Patent: May 1, 1984
    Assignee: Oy Wartsila Ab
    Inventors: Keijo Lehikoinen, Kyosti Nevalainen