Antiscattering device for the collection of waste material produced in the course of drilling, milling and similar operations, to be fitted on the relevant machine tools

Claim 1

In combination, an antiscattering device for the collection of waste material produced in the course of drilling and milling, and a machine tool onto which said device is to be fitted, comprising: means for attaching a drill bit to the tool; a frustum-conical bellows bell which is fitted on a frame of the tool coaxially with the means for attaching the drill bit and forming a passage for the waste material; a fan coaxial with the means for attaching the drill bit for providing suction; a seal ring connected to the wider end of said bell to be placed on a surface of the material to be drilled and having a plurality of holes defined therein for maintaining and controlling air flow produced by the fan; collecting means mounted on the frame of the tool for collecting the waste material which passes through said bell; a driving shaft for driving rotation of the drill bit; a hollow shaft coaxial and surrounding said driving shaft for driving said fan; and gear means for directly connecting said hollow shaft of said fan to the driving shaft of the tool, for rotating said fan at an angular velocity different than the angular velocity of the drill bit to ensure substantial ideal operation velocities for said fan and the drill bit, and for causing operation of the fan when said tool is operated; wherein the waste material created by the tool is suctioned through said bell by said fan into said collecting means.