Patent ID: 7422075

Claim:
A clutch assembly for a rotary power tool, the clutch assembly comprising: an output gear including a shaft portion defining a longitudinal axis; an input gear freely rotatable about the shaft portion, the input gear including a first driving surface and a second driving surface; a first washer having a first driven surface; a first torque transmission element located between the first driving surface and the first driven surface; a second washer having a second driven surface; a second torque transmission element located between the second driving surface and the second driven surface; a first biasing member that biases the first driving surface, the first torque transmission element, and the first driven surface into driving engagement; and a selector that selectively biases the second driving surface, the second torque transmission element, and the second driving surface into driving engagement, wherein the first and second torque transmission elements, driving surfaces, and driven surfaces are arranged so that the first torque transmission element does not engage at least one of the first driving surface and first driven surface when the second torque transmission element engages the second driving surface and the second driven surface.