Drill bit with improved removal of the drill core

Abstract: drill bit including a drilling shaft and a cutting portion having a first drilling segment, a second drilling segment and a third drilling segment. the first drilling segment has a first inner lateral surface with a first inner distance, the second drilling segment has a second inner lateral surface with a second inner distance, and the third drilling segment has a third inner lateral surface with a third inner distance from the longitudinal axis of the drilling shaft. the first inner distance varies between a first maximum value and a first minimum value over the circumference of the first drilling segment and has precisely one first absolute minimum value. the second inner distance is greater than or equal to the first absolute minimum value over the circumference of the second drilling segment, and the third inner distance is greater than or equal to the first absolute minimum value over the circumference of the third drilling segment.

Inventor(s): Marcel SONDEREGGER, József SZABÓ, Alexander GRETHER, Andreas Oliver SCHLAG, Cliff TOLDO, Matthaeus HOOP, Jens STRACKE

CPC Classification: B23B51/0467 ({Details of the tubular body sidewall})

Search for rejections for patent application number 20250229344