Patents by Inventor Rieks Zonderman

Rieks Zonderman 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: 4022409
    Abstract: Electrically driven railway point operating apparatus having a biasing device whereby, without damage to the operating mechanism the point can be forced open against its closing bias by the wheels of a vehicle. The point operating slide is moved by a lever which in turn is moved by a driving member which is driven in either of opposed directions by a reversible electric motor. The driving member carries a roller which is located in an aperture in the lever, so that relative movement of the lever and the roller is permitted. The roller is returned by the motor to an intermediate position, when a switching operation is complete, so that the lever can move relative to the roller if the point is forced open.
    Type: Grant
    Filed: June 30, 1976
    Date of Patent: May 10, 1977
    Assignee: Hoogovens Ijmuiden BV
    Inventors: Tom Ensink, Rieks Zonderman