Patent ID: 8568066
Filing Date: 2013-10-29
Classification: B25H,Y10T

Abstract:
1. A drilling machine comprising: an electromagnet for attaching said drilling machine to a metal part, said electromagnet having a switched on condition and a switched off condition; an electric motor for driving a tool, said electric motor having a switched off condition and a switched on condition; a controller for controlling said electromagnet and said electric motor, said controller comprising at least one motor switch for switching on and off said electric motor and at least one magnetic switch for switching on and off said electromagnet; and a speed sensor which is coupled to said controller so as to allow switching off said electromagnet only when said electric motor is running at a speed lower than or equal to predefined threshold speed of 100 r.p.m.; wherein said controller is configured so as to allow switching off the electromagnet only when the electric motor is in its switched off condition.