| 20090066039 | Tool-Carrier Chuck for Fitting to a Rotating Machine, Particulary of the "Impact Wrench" Type - A chuck includes: a body attached to a rotating machine, carrying jaws; a peripheral nut fixedly attached to the body rotatably in a clamping direction; a ring that can be moved about the nut according to a limited angular amplitude, and having a considerable weight; and a spring connecting the nut and the ring. The nut includes a tooth interacting with a tooth of the ring to operate the ring in the clamping direction. When the body rotates in an unclamping direction, the ring, due to its inertia, does not follow the rotary movement of the nut. Then, when the machine stops and under the effect of the spring, impacts the tooth of the nut causing the jaws to clamp. | 03-12-2009 |
