Patent ID: 9222354
Filing Date: 2015-12-29
Classification: E21C

Abstract:
1. A tool system, comprising: a bit holder including a bit receptacle, the bit receptacle including a first diameter region, a second diameter region, and a receptacle transitional segment between the first diameter region and the second diameter region; and a bit including a bit shank having a longitudinal center axis, the bit including a first cylindrical segment, a second cylindrical segment, and a shank transitional segment between the first cylindrical segment and the second cylindrical segment; wherein the receptacle transitional segment and the shank transitional segment are spaced from one another in the direction of the longitudinal center axis to form a resetting space having a length in a range of from 4 mm to 20 mm; wherein the first cylindrical segment of the bit shank has a diameter in a range of from 18 mm to 30 mm, and a length in the direction of the longitudinal center axis less than or equal to 30 mm; and a securing element disposed about the bit shank and slidable for the entire length of the resetting space in the direction of the longitudinal center axis along a slide guide of the bit receptacle.