Patent ID: 7052420

Claim:
An over-running clutch pulley for rotationally engaging an input device and an output device, comprising: a sheave member including a sheave input section defining a sheave input surface adapted to the engage the input device, and including a sheave clutch section defining a sheave clutch surface; a hub member located substantially concentrically within said sheave member, including a hub output section defining a hub output surface adapted to engage the output device, and including a hub clutch section defining a hub clutch surface substantially adjacent said sheave clutch surface; a clutch member adapted to engage said sheave clutch surface and said hub clutch surface upon the acceleration of said sheave member in a first rotational direction relative to said hub member, and to disengage said sheave clutch surface and said hub clutch surface upon the deceleration of said sheave member in the first rotational direction relative to said hub member; and a coating disposed on said sheave input surface, said sheave clutch surface, said hub output surface, and said hub clutch surface and adapted to protect against substantial corrosion and to increase wear resistance wherein said coating comprises a first layer and a second layer, said first layer including a zinc material other than zinc chromate, the second layer being disposed on said first layer and being substantially formed of a zinc chromate material.