Patent ID: 8292550
Filing Date: 2012-10-23
Classification: B23B,B23Q,Y10T

Abstract:
1. A perforation device, comprising: a cutting tool, a threaded spindle mounted on the cutting tool, means for driving said cutting tool and said threaded spindle in joint rotation around an axis, means for driving said cutting tool and said threaded spindle in joint translation along the axis, including a tapped pinion mounted on the threaded spindle and locked in translation with respect to the axis such that the relative motion of the tapped pinion to the threaded spindle moves the spindle and the cutting tool in translation along the axis, and a gear train including a driving pinion and a transmission pinion adapted to synchronize said means for driving in rotation with said means for driving in translation, wherein a speed ratio between the driving pinion of said gear train connected in rotation to said means for driving in rotation and the transmission pinion of the means for driving in translation is inverted at least once during one rotation of said cutting tool, and wherein ratio between a speed of rotation and a speed of translation is variable during the rotation of the cutting tool.