Patent ID: 9347514
Filing Date: 2016-05-24
CPC Classification: F16F

Claim Text:
1. A magnetic viscous fluid damper using a magnetic viscous fluid, comprising: a cylinder that the magnetic viscous fluid is sealed in; a piston that is slidably disposed within the cylinder; two fluid chambers that are partitioned by the piston; a hollow rod that is coupled to the piston and protrudes to an outside of the cylinder; an electromagnetic coil having a magnet wire wound around the piston; two lead wires that extend from both ends of the magnet wire; and a coil assembly in which the electromagnetic coil and the two lead wires are embedded in a mold resin, wherein the piston includes a hollow first core coupled to the rod and a second core that sandwiches the coil assembly with the first core, wherein the two lead wires are passed through an inside of the first core and are electrically continuous with an electric wire passed through an inside of the rod, wherein the coil assembly includes a primary mold member that is molded such that the two lead wires are embedded, and the electromagnetic coil is wound around an outer circumference of the primary mold member and a secondary mold member that is molded such that the electromagnetic coil is embedded between the primary mold member and the secondary mold member after the primary mold member is assembled on the first core and the first core is set in molds, and wherein a flow path via which the magnetic viscous fluid flows between the two fluid chambers is defined by an outer circumferential surface of the secondary mold member.