Patent ID: 9410595
Filing Date: 2016-08-09
CPC Classification: F16F

Claim Text:
1. A damping valve for a shock absorber, comprising: a valve disc configured to partition a first chamber and a second chamber; a retainer provided on a second chamber side of the valve disc, the retainer having an inner peripheral surface; a flow passage penetrating the valve disc and the retainer and constantly communicating with the first chamber; an annular plate-shaped leaf valve provided on a side of the retainer opposite to the valve disc to open and close a communication of the flow passage with the second chamber; a shaft member penetrating the valve disc, the retainer and the leaf valve, the shaft member having a central axis and an outer periphery facing the inner peripheral surface of the retainer; and a first outer peripheral groove formed on the outer periphery of the shaft member and along the central axis, wherein the first outer peripheral groove and the inner peripheral surface of the retainer form a choke passage having a flow characteristic of a choke and connecting the first chamber and the second chamber.