Patent ID: 7080964

Claim:
A tool chuck for a rotary power hand tool of the type which has an elongated generally cylindrical housing containing a motor having a motor output shaft with a hollow end portion and a threaded outer surface extending from a nose end thereof, the housing having a generally cylindrical nose end portion that is concentric with said motor output shaft, said nose end portion having at least one light emitting device that directs light generally in a direction that is parallel to the output shaft, said tool chuck comprising: a cylindrical body portion having a concentrically aligned conically shaped chamber, the top of which communicates with a tool opening, a base portion having a threaded base opening communicating with said chamber, said base portion being threadable on the motor output shaft; an annular cylindrical light transmitting portion attached to said body portion for transmitting light from the light emitting device of the hand tool to the area of the tool shank inserted into said tool opening, the surface of said light transmitting portion closest to the free end of the tool being angled inwardly to direct transmitted light inwardly toward the axis of said tool.