Patent ID: 9248510
Filing Date: 2016-02-02
CPC Classification: B23B,B23Q,Y10T

Claim Text:
1. A guiding tool for the drill bit of a drilling apparatus on a working surface, so that it is positioned perpendicularly to it, comprising a body having an orifice for passage of the drill bit and a base with at least three protruding feet for resting on said working surface, comprising: a) the feet are configured with inner holes with an outlet at their ends; b) the guiding tool comprises a pressurized gas pipeline ending in said feet operatively connected to a pneumatic device that supplies pressurized gas; c) said pneumatic device includes a signal indicative of the correct positioning of the tool for performing a drill when, having activated the supply of pressurized gas to the tool, there is a simultaneous blocking of gas output by said feet when all of them are in contact with the working surface, wherein said pneumatic device comprises a pressurized gas supply circuit, having a pressure gas source and a regulating valve, and an actuating parallel circuit of an emitter of said signal controlled by a bistable pressure valve connected to the pressurized gas source and to the gas supply circuit.