Patent ID: 9133886
Filing Date: 2015-09-15
Classification: B22F,C22C,F16D

Abstract:
1. A constant velocity universal joint comprising: an outer joint member; an inner joint member arranged inside of the outer joint member; and torque transmitting members, wherein at least one of the outer joint member and the inner joint member comprises track grooves that are engaged with rolling surfaces of the torque transmitting members, wherein at least one component of the constant velocity universal joint is formed of a metal sintered compact having pores, wherein the metal sintered compact has a relative density of 80% or more and less than 100%, wherein the metal sintered compact comprises a heat-treated hardened layer formed on a surface thereof, and wherein the surface includes a first surface portion having porous structures densified through partial plastic working, and a second surface portion free from plastic working, the second surface portion retaining a lubricant.