Patent attributes
A power transmission device of a steering system. A first connector includes a cylindrical first support coupled to one of coaxial first and second shafts and first coupling portions extending axially from inner circumferential portions of the first support. A second connector includes a second support coupled to the other of the first and second shafts and fitted into the first support and second coupling portions extending axially from outer circumferential portions of the second support. A damper includes outer support recesses provided in outer circumferential portions thereof, with the first coupling portions being fitted into the outer support recesses, and inner support recesses provided in inner circumferential portions thereof, with the second coupling portions being fitted into the inner support recesses, wherein the damper is coupled between the first connector and the second connector.