Patent ID: 11953075
Assignee: HITACHI ASTEMO, LTD.
Field: nan (nan)
Classification: CPC nan | IPC B  F

Claim 0:
1. A damper device comprising:
a piston rod;
an outer tube housing the piston rod;
an electro-rheological fluid provided between the outer tube and the piston rod; and
a voltage applying mechanism that is provided between the outer tube and the piston rod and applies a voltage to the electro-rheological fluid,
wherein
the voltage applying mechanism includes an anode and a cathode,
the electro-rheological fluid is located between the anode and the cathode,
an insulating layer is provided on a surface of the anode on a side facing the cathode or on a surface of the cathode on a side facing the anode, and
a thickness t (m) of the insulating layer satisfies following Formula (1) when a maximum voltage applied to the electro-rheological fluid is Vmax (V),

t≥2.5×10−8×Vmax  Formula (1)