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:
Oct. 18, 2016
Filed:
Jun. 16, 2015
Fred M. Johnson, Fullerton, CA (US);
Fred M. Johnson, Fullerton, CA (US);
Other;
Abstract
Intrinsically calibrated friction mensuration device has a drive unit with controllable motive member, configured to receive a controllable propulsion force, and to apply tractive force by a Class 1 lever to a weighted test piece. A force engine couples to the motive member, and applies the controllable propulsion force. The device includes a controller imposing a propulsion control signal actuating the force engine to produce the propulsion force. A force sensor joins drive unit and test piece, producing a force signal responsive to a sensed force between drive unit and test piece. The sensed force includes hydroplaning SCOF and hydroplaning DCOF. A method includes applying an increasing tractive force to a test piece at rest; measuring the tractive force; identifying the maximum tractive force applied at incipient motion; identifying the transition between the resting test piece and incipient motion; determining the hydroplaning SCOF; continuing motion; and determining the hydroplaning DCOF.