Patent ID: 7798296
Filing Date: 2010-09-21
Classification: F16F

Abstract:
1. A damper device comprising: a casing comprising a cylindrical inner circumferential surface and an opening; a shaft body located in a cylindrical space of the casing and supported in a freely turnable manner; a cover adapted for sealing the casing; viscous fluid which is stored in a sealed space formed between the shaft body and the casing; and a metal washer disposed between the casing and the cover; wherein the metal washer is made of material different from the cover; wherein the cylindrical inner circumferential surface of the casing comprises: a first inner circumferential surface which forms the sealed space in which the viscous fluid is stored; a second inner circumferential surface which faces a large diameter part of the shaft body; and a third inner circumferential surface along which an insert part formed in the cover is inserted into the casing; wherein the casing further comprises: wherein the shaft body further comprises: wherein the metal washer is disposed between the second engagement part of the casing and the cover, so that a position of the cover, in the axial direction, is determined by the second engagement part of the casing via the metal washer when the first engagement part is ultrasonically welded with the cover.