Patent ID: 7766550

Claim:
An assembly comprising: a turbocharger center housing that comprises a bore; a turbocharger bearing wherein the turbocharger bearing comprises an annular groove and a notch wherein the annular groove comprises a diameter; and a substantially planar spring, seated at least partially in the annular groove for positioning the turbocharger bearing in the bore of the housing, wherein the spring comprises a free standing inner diameter, a free standing outer diameter, a tang seated at least partially in the notch for preventing rotation of the spring about the turbocharger bearing; a substantially sinusoidal shape to provide an inward radial bias at contact points between the spring and the bearing and to provide an outward radial bias at contact points between the spring and a housing wherein the spring balances the inward radial bias with the outward radial bias to reduce contact between the bearing and the housing and variation in a squeeze film thickness and wherein the diameter of the annular groove of the bearing exceeds the free standing inner diameter of the spring.