Patent ID: 7278623
Filing Date: 2007-10-09
Classification: F16F

Abstract:
1. A vibration control unit, comprising: a rolling element having a first curved surface that is curved in three dimensions, of constant radius, and convex is interposed between a first member and a second member and capable of rolling with respect to the first member on the first curved surface of the rolling element; wherein the rolling element has a second curved surface that is curved in three-dimensions, of constant radius, and faces the first curved surface and is formed of a curved surface center different from that of the first curved surface; wherein the rolling element is configured so that as the rolling element, resulting from an additional force applied on the first and second curved surfaces, rolls with respect to the first member, the second member vibrates with a restoring force that is determined based on an average curvature radius of the first and second curved surfaces of the rolling element and a distance between the curved surface centers of the first and second curved surfaces; and wherein the rolling element is axially symmetric with respect to a central axis that extends in a direction between the first curved surface and the second curved surface.