Method and apparatus for determining coefficient of friction
AssigneeThe Goodyear Tire & Rubber Company
InventorsCheng-Hsiung Lin, Joel Joseph Lazeration
Life of this patent
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Abstract
The coefficient of friction of an elastomeric sample can be determined by: (a) providing a friction test machine having a rigid wheel with an outer surface defining a curvilinear friction surface, a sample holder and, a force measurement device; (b) placing the elastomeric sample onto the sample holder; (c) adjusting the elastomeric sample and the curvilinear friction surface into frictional engagement thereby forming a curvilinear deformation in the elastomeric sample; (d) rotating the rigid wheel; and, (e) using the force measurement device to obtain a geometry independent measurement indicative of the coefficient of friction of the elastomeric sample.
Claims18
A friction test machine comprising:
- a frame;
- a curvilinear friction surface;
- a rotation device operatively connected to the frame and configured to selectively rotate the curvilinear friction surface;
- a sample holder configured to hold a sample;
- a motion device operatively connected to the frame and configured to selectively adjust the sample and the curvilinear friction surface into frictional engagement;
- and,
- a force measurement device for obtaining a measurement indicative of the coefficient of friction of the sample.
A method of determining the coefficient of friction of a sample, comprising the steps of:
- providing a friction test machine comprising:
- (a) a curvilinear friction surface;
- (b) a sample holder;
- and, (c) a force measurement device;
- placing the sample onto the sample holder;
- adjusting the sample and the curvilinear friction surface into frictional engagement;
- rotating the curvilinear friction surface;
- and,
- using the force measurement device to obtain a measurement indicative of the coefficient of friction of the sample.
A method of determining the coefficient of friction of an elastomeric sample, comprising the steps of:
- providing a friction test machine comprising:
- (a) a rigid wheel having an outer surface defining a curvilinear friction surface;
- (b) a sample holder;
- and, (c) a force measurement device;
- placing the elastomeric sample onto the sample holder;
- adjusting the elastomeric sample and the curvilinear friction surface into frictional engagement thereby forming a curvilinear deformation in the elastomeric sample;
- rotating the rigid wheel;
- and,
- using the force measurement device to obtain a geometry independent measurement indicative of the coefficient of friction of the elastomeric sample.
Dependencies are inferred from the claim text.