Patents by Inventor Marco F. Luinstra

Marco F. Luinstra 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).

  • Lift car suspension
    Patent number: 4428460
    Abstract: A lift car support apparatus providing relatively low natural frequencies of horizontal vibration of the car. A lift car is supported by a lift support member via suspension units. In each unit an intermediate member is pivotably connected to the lift support member. A single elongate member is fixedly connected to that intermediate member and pivotably connected to the underside of the lift car near its floor.
    Type: Grant
    Filed: October 15, 1980
    Date of Patent: January 31, 1984
    Assignee: Elevators Pty. Limited
    Inventor: Marco F. Luinstra