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:
Mar. 31, 2009
Filed:
Jan. 11, 2007
Donald R. Halliday, Powell, OH (US);
Donald R. Halliday, Powell, OH (US);
Other;
Abstract
A method for measuring-road surface friction of a road surface uses a vehicle that moves across the road surface wherein (1) an auxiliary independent wheel assembly is towed behind the vehicle and is in contact with the road surface, an auxiliary wheel of the wheel assembly is freely rotatable by movement of the vehicle and is one or more of toed in or toed out with respect to a direction of travel of the vehicle so as to create an isolated axial force on the auxiliary wheel: (2) the axial force on the auxiliary wheel is measured while the vehicle moves across the road surface, and the measured axial force is correlated with the road surface friction. The independent wheel assembly is load isolated from the weight of the towing vehicle and the independent wheel assembly is loaded by placing ballast thereon.