The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 06, 2007
Filed:
Sep. 16, 2003
Marinus Hendrikus Olde Weghuis, Oldenzaal, NL;
Gerben Christiaan Bierma, Enschede, NL;
Hendrik Hazenberg, Enschede, NL;
Ingo Wynand Witbreuk, Oldenzaal, NL;
Marinus Hendrikus Olde Weghuis, Oldenzaal, NL;
Gerben Christiaan Bierma, Enschede, NL;
Hendrik Hazenberg, Enschede, NL;
Ingo Wynand Witbreuk, Oldenzaal, NL;
Ten Cate Thiolon B.V., Re Nijverdal, NL;
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. According to the invention, the device is to that end characterized in that the contact surface of the body is in line with the axis of rotation of the rotatable shaft.