Friction test apparatus and method

Details Friction test apparatus and method Friction test apparatus and method

2004-11-23

2008-05-20

Cygan, Michael (Department: 2855)

Measuring and testing

Frictional resistance, coefficient or characteristics

C073S010000, C073S053060

Reexamination Certificate

active

07373800

ABSTRACT:
A friction test apparatus includes a base structure and a receptacle secured to the base structure. At least three lower friction surfaces are positioned in the receptacle. The friction test apparatus includes a motor having a rotatable shaft providing powered rotation of the shaft. An upper friction surface is positioned on the shaft in contact with the at least three friction surfaces in the receptacle. The receptacle includes a fluid inlet and a fluid outlet to permit a fluid in the receptacle to be changed.

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patent: 2183347 (1987-06-01), None
ASTM 2783-88 (Standard Test Method for Measurement of Extreme-Pressure Properties of Lubricating Fluids (Four-Ball Method), Dec. 1988.
Boerlage et al. Engineering “Four-Ball Top for Testing the Boundary Lubricating Properties of Oils under High Mean Pressures”, Jul. 2, 1937, vol. CXLIV.
http://web.archive.org/web/20000531132119/http://www.labkorea.com/products/falex/4.htm Archived on May 31, 2000.

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