Portable tester for measuring the static coefficient of friction

Details Portable tester for measuring the static coefficient of friction Portable tester for measuring the static coefficient of friction

1975-07-25

1976-08-24

Woodiel, Donald O.

Measuring and testing

Frictional resistance, coefficient or characteristics

G01N 1902

Patent

active

039759407

ABSTRACT:
A portable testing device for determining the static coefficient of frict between a floor surface and a shoe sole or heel material includes an upper, weighted strut movable within a vertical plane and a lower strut pivotably secured to the bottom portion of the upper strut. The upper strut is mounted within a bearing block which is translatably movable within a horizontal plane, and the lower strut has secured to the bottom portion thereof a yoke within which a metal shoe carrying a representative shoe sole or heel material to be tested is pivotably secured. The yoke and shoe project through the base of the device framework so as to rest upon the flooring material being tested, and a trigger is disposed near the shoe so as to be actuated thereby upon the occurrence of slip between the shoe and flooring materials. The trigger is in turn connected to a friction clutch which controls the movement of a graduated rod, which is coupled to the bearing block so as to monitor the movement thereof and upon which the static coefficient of friction data is indicated, and upon the occurrence of slip, the movement of the rod is arrested by the clutch mechanism whereby the friction coefficient may be read directly from the rod.

REFERENCES:
patent: 3187552 (1965-06-01), Davies

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