Patent ID: 9416860
Filing Date: 2016-08-16
CPC Classification: F16D,F16F,F16H

Claim Text:
1. A vibration damping device, which is applied to a power transmission unit having an input side rotary member that transmits a power to an elastic member and an output side rotary member that is rotated by the power transmitted from the elastic member, and that is adapted to damp vibrations of the output rotary member, comprising: a hydraulic transmission adapted to transmit power by a flow of fluid; a holding chamber bounded by a housing that is formed inside of the hydraulic transmission, the housing (1) comprising the input side rotary member which covers an outer circumferential side of the output side rotary member, and (2) being rotated relatively with the output side rotary member; and a rolling member that is held in the holding chamber in an outer circumferential side of the output side rotary member in a manner to oscillate in a rotational direction of the output side rotary member while being allowed to rotate relative to the output side rotary member; and a sealing member that is interposed between the housing and the output side rotary member to prevent entering of the fluid into the holding chamber holding the rolling member, so as to maintain the holding chamber in a dry condition, wherein the elastic member is disposed in an inner circumferential side of the sealing member.