192 clutches and power-stop control – Elements – Engaging surfaces
Reexamination Certificate
2006-02-21
2006-02-21
Lorence, Richard M. (Department: 3681)
192 clutches and power-stop control
Elements
Engaging surfaces
C192S070140
Reexamination Certificate
active
07000752
ABSTRACT:
A reaction member adapted for engagement with a friction member in a torque-transmitting mechanism is provided. The reaction member includes a reaction member base and a coating formed on the reaction member base. The coating is characterized by a coefficient of friction. The coated reaction member base is selectively engageable in sliding contact with the friction member. The sliding contact is at least partially characterized by the coefficient of friction of the coating. When lubricant is disposed between the friction member and the coated reaction member base, the sliding contact is at least partially characterized by an elasto-hydrodynamic (EHD) coefficient of friction of the lubricant. When no lubricant is so-disposed (i.e., during the asperity phase), the sliding contact is characterized by the coefficient of friction of the coating, which is less than the EHD coefficient of friction, thus avoiding a high operating coefficient of friction during the asperity phase.
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DeVries Christopher
General Motors Corporation
Lorence Richard M.
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