Patent ID: 8708346
Filing Date: 2014-04-29
Classification: B23B,Y10T

Abstract:
1. A collet for connecting a rotary tool to a rotary tool driver, the rotary tool including a shaft having a shaft end and a shaft diameter, the collet comprising: a body including a first end configured to connect to the rotary tool driver and a second end configured to receive the rotary tool and including a frustoconical bore; a magnet disposed within the body and positioned to magnetically engage and contact the shaft end to inhibit movement of the rotary tool along a shaft rotational axis; a support member disposed within the body and configured to support the shaft for rotation about the shaft rotational axis, the support member including a plurality of jaws each including a body having a frustoconical outer surface, each of the frustoconical outer surfaces engaged with the frustoconical bore to move the jaws away from and toward the shaft rotational axis in response to movement of the jaws toward the first end and toward the second end respectively, wherein the plurality of jaws includes a roller supported by the body and operable to engage the rotary tool, and wherein each of the bodies includes an opening adapted to receive the roller, wherein the opening includes a curved side and a hooked side, and wherein rotation of the rotary tool about the shaft rotational axis in a first direction biases the roller toward the curved side wherein the roller and the rotary tool are free to rotate and rotation of the rotary tool about the shaft rotational axis in a second direction opposite the first direction biases the roller toward the hooked side wherein the roller and the rotary tool are inhibited from rotating.