Coefficient-of-friction measuring device, in particular for the measurement of coefficients of friction depending on speed

US5315860A · kind A · utility

Assignee

• Alfred Teves GmbH · DE

Inventors

• Ludwig Dreilich · Kronberg, DE
• Karl-Friedrich Woersdoerfer · Budenheim, DE
• Thomas Egerer · Karben, DE
• Reinhold Worms · Ennigerloh, DE

Key dates

• Filing date: May 14, 1991
• Grant date: May 31, 1994
• Expiry date: May 14, 2011

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N19/02
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A simple-design device for the measurement of coefficients of friction depending on the relative speed between a sample (8) and a brake disc (13) features a simple-design set-up and is well suited for the measurement of the changes of the coefficient of friction in the starting and in the stopping phases of the friction surface (13). The device operates by pressing the sample (8) with a defined pressing force (K1, K2) onto the friction surface (13) and simultaneously measures that force (K3) with which the samples (8) are dragged by the friction surface (13) transversely to the pressing force (K1, K2) as a function of time and speed. A brake disc can be provided as a friction surface (13). A single source of forces (K1, K2) for the pressing force can also be provided, resulting in a simple-design and sturdy structure for the device.