Patents Assigned to Markus Hermetische Deuren B. V.
  • Device for operating a sliding door
    Patent number: 4452014
    Abstract: Device for operating a sliding door comprising an endless chain guided over at least two wheels in a plane parallel to the plane of the door, said chain being provided with at least one catch which can co-operate with at least one abutment connected to the door for opening and/or closing said door. The guiding wheels of the chain being positioned such that the direction of movement of the catch has a relatively large vertical component at the beginning of the movement of the door.
    Type: Grant
    Filed: November 30, 1982
    Date of Patent: June 5, 1984
    Assignee: Markus Hermetische Deuren B.V.
    Inventor: Jan J. G. Markus
  • Sliding door, meant especially to be used in fire protection or insulation
    Patent number: 4185418
    Abstract: Sliding door, meant especially to be used in fire protection or insulation, whereby the sliding door comprises a framework consisting of a number of profiles on which framework panels are attached.
    Type: Grant
    Filed: December 28, 1977
    Date of Patent: January 29, 1980
    Assignee: Markus Hermetische Deuren B. V.
    Inventor: Jan J. Markus
  • Combination sliding door and rail cover
    Patent number: D271812
    Type: Grant
    Filed: February 23, 1981
    Date of Patent: December 13, 1983
    Assignee: Markus Hermetische Deuren B.V.
    Inventor: Jan J. G. Markus