Patents by Inventor Wynand Witbreuk

Wynand Witbreuk 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).

  • Device for measuring the static and/or dynamic friction coefficient of a surface
    Patent number: 7290436
    Abstract: The present invention relates to a device for measuring the static and/or dynamic friction coefficient of a surface, in particular a natural or artificial grass surface, which device comprises a housing placed on supports, which is to be positioned on the surface to be examined; a rotatable shaft, which is vertically disposed in said housing; a body connected to the end of said shaft that faces towards the surface, which body comprises a contact surface which can be brought into contact with the surface to be examined; as well as measuring means for measuring, during operation, the torque caused by the friction between the surface to be examined and the contact surface of the rotating body. The object of the present invention is to provide a device for measuring the static and/or dynamic friction coefficient of a surface which provides a more reliable and reproducible measuring result and which is furthermore user-friendly and easy to transport.
    Type: Grant
    Filed: September 16, 2003
    Date of Patent: November 6, 2007
    Assignee: Ten Cate Thiolon B.V.
    Inventors: Marinus Hendrikus Olde Weghuis, Gerben Christiaan Bierma, Hendrik Hazenberg, Ingo Wynand Witbreuk
  • Method and device for determining the values of stiffness and dampening of surfaces
    Patent number: 6962073
    Abstract: The present invention relates to a method for determining the values of stiffness and dampening, in particular of surfaces for sports fields. The invention furthermore relates to a device for carrying out the aforesaid method. The object of the present invention is to provide a method and a device for determining the values of stiffness and dampening of an artificial grass lawn which provide a reliable measuring result in a quick and efficient manner, which device is furthermore user-friendly and easy to transport.
    Type: Grant
    Filed: February 1, 2002
    Date of Patent: November 8, 2005
    Assignee: Ten Cate Thiolon B.V.
    Inventors: Edward Hage, Wynand Witbreuk, Geurt Bastiaan Slootweg, Marinus Hendrikus Olde Weghuis
  • Method and device for determining the values of stiffness and dampening of surfaces
    Publication number: 20040163448
    Abstract: The present invention relates to a method for determining the values of stiffness and dampening, in particular of surfaces for sports fields. The invention furthermore relates to a device for carrying out the aforesaid method. The object of the present invention is to provide a method and a device for determining the values of stiffness and dampening of an artificial grass lawn which provide a reliable measuring result in a quick and efficient manner, which device is furthermore user-friendly and easy to transport.
    Type: Application
    Filed: January 8, 2004
    Publication date: August 26, 2004
    Inventors: Edward Hage, Wynand Witbreuk, Geurt Bastiaan Slootweg, Marinus Hendrikus Olde Weghuis