Patent ID: 9446463
Filing Date: 2016-09-20
CPC Classification: B23B,B23G,Y10T

Claim Text:
1. A tap holder, comprising: a chuck for holding a tap, a holder body for holding the chuck so that the chuck is slidable along a rotational axis with respect to the holder body and rotatable in synchronism with the holder body defining a leading end side at which the tap is positioned and a rear end side at which the holder body is positioned in the rotational axis, at least two elastically deforming members that are deformable, a retainer constituted of a tubular member slidably disposed on the chuck and interposed between two of the deforming member and having a rear end and a leading end in the rotational axis, one of which facing the chuck and the other of which facing the holder body, wherein ball members ( the retainer is to be displaced in the rotational axis by the ball members rotating in correspondence with a moving of the chuck, the moving caused by the tension force, so that a deformation amount (L