Patent ID: 7428952
Filing Date: 2008-09-30
Classification: F16F,Y10T

Abstract:
1. A damper device comprising: a substantially cylindrical stationary case; a stationary plate housed in the stationary case in a movable manner in an axial direction, the stationary plate having a shape of one of a semicircular shape and a sector shape; a movable shaft rotatably inserted into the stationary case; a movable plate attached to the movable shaft in a movable manner in an axial direction, the movable plate having a semicircular shape when the stationary plate has a sector shape, and the movable plate having a sector shape when the stationary plate has a semicircular shape; and a spring making the stationary plate and the movable plate resiliently contact; wherein the stationary plate and the movable plate resiliently contact over a different contact area as the movable shaft rotates, and wherein the contact area of the stationary plate and the movable plate decreases continuously from its maximum value or increases continuously from its minimum value according to a rotation angle of the movable shaft.