Measuring and testing – Frictional resistance – coefficient or characteristics
Patent
1992-05-27
1993-11-09
Raevis, Robert
Measuring and testing
Frictional resistance, coefficient or characteristics
G01N 1902
Patent
active
052592367
ABSTRACT:
A tribometer which approximately duplicates the forces exerted on a test surface by a human foot or cane tip during the walking process. The force exerted on the test surface by a test specimen is provided by a fluid actuated cylinder supplied with a compressed fluid. This force is applied during a sufficiently short period of time so as to avoid the absorbtion and squeegee effects normally encountered when testing wet surfaces. The coefficient of friction for the test surface is then determined by measuring the angle of incidence at which the test specimen will slip when brought into contact with the test surface.
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Murphy, "Crutch or Cane Tip Slippage on Wet Tile vs. Velocity at Contact" Draft Revision--Not Dated.
Slipping Cane and Crutch Tips--Part I--Static Performance of Current Devices; Leon Bennett, M. A. E. and Eugene F. Murphy, Ph.D., Bulletin of Prosthetics Research for 1977, pp. 71-90.
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