Patent ID: 9403216
Filing Date: 2016-08-02
CPC Classification: B23B,Y10T

Claim Text:
1. A first coupling part that interacts with a second coupling part of a tool coupling, the first coupling part comprising: a first body; and a conical pin extending from the first body along a center axis to an end surface and having a decreasing diameter from the first body to the end surface, the conical pin being insertable into a conical seat, which extends along a longitudinal axis of the second coupling part such that the center axis and the longitudinal axis coincide, the conical pin including a cavity having a bottom surface opposed to the end surface, the cavity extending axially along the center axis from the end surface to the bottom surface and including a number of first protuberances, the number of first protuberances being separated and arranged at a distance from each other along a circumferential direction with respect to the center axis and forming therebetween a corresponding number of first recesses, the number of first protuberances being arranged at a distance from the bottom surface and each forming a respective first contact surface facing the bottom surface, wherein the first contact surfaces interact with a corresponding number of separated, second contact surfaces of a pull member of the second coupling part, each respective first contact surface forming an acute angle with the center axis, wherein the acute angle of each of the first contact surfaces is configured to allow a force to be formed that is radially outwardly directed and acts on the conical pin, which force contributing to an outer surface of the conical pin abutting and being pressed against an conical inner surface of the seat, at least radially outside the protuberances and the first contact surfaces.