Patent ID: 7883424
Filing Date: 2011-02-08
Classification: B23P,F16D,Y10S,Y10T

Abstract:
1. A torque transmission device comprising at least one component having two functional areas for transmitting torque via respective different functional areas which are formed on the component and which achieve torque transmission by formfitting interengagement, wherein: one of said functional areas is a longitudinal profile; prior to formation of the longitudinal profile, the component as a whole is brought to a hardness which is higher than a base hardness of said component by a hardening process which produces at least one boundary layer having a depth with highest hardness and below said boundary layer a layer with core hardness, said core hardness being higher than said base hardness and lower than said highest hardness, and during subsequent formation of the longitudinal profile, the entire depth of the at least one boundary layer is removed in the area of the longitudinal profile down to said layer with core hardness.