Back to results
US 2003/0155196 A1Published application
Rotary damper
AssigneeNifco Inc.
InventorMasayuki Nishiyama
Life of this patent
Estimating the term…
Abstract
A rotary damper includes a cylindrical member having walls on an inner peripheral surface of a cylindrical chamber along a radial line, and a rotor member having vanes moving along the inner peripheral surface of the cylindrical chamber. A resistance force of a viscous fluid filled in the cylindrical chamber is applied to the vanes when the cylindrical member rotates relative to the rotor member. The rotor member is formed of a thermoplastic resin containing inorganic filler or fiber. Thus, the rotor member having high strength can be obtained.
Claims8
A rotary damper comprising:
- a cylindrical member having a wall formed on an inner surface thereof and extending along a radial direction of the cylindrical member,
- a rotor member inserted in the cylindrical member and having a vane moving along the inner surface of the cylindrical chamber, said rotor member being formed of a thermoplastic resin containing at least one of inorganic filler and fiber, and
- a viscous fluid filled in the cylindrical chamber so that a resistance force of the viscous fluid is applied to the vane of the rotor member when the rotor member rotates relative to the cylindrical member.
Dependencies are inferred from the claim text.