IP Library Granted Patent US 9,663,182
Granted Patent B2
US 9,663,182 · App. 14/779,038 · Granted May 30, 2017

Front fork

Inventors: Takahisa Mochizuki (Gifu, JP); Naoki Ito (Gifu, JP); Keiji Saito (Tokyo, JP)
Assignee: KYB Corporation
B62K25/08B62K25/06F16F9/28F16F9/535F16F9/532
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Quick Facts
Patent No.
US 9,663,182
App. No.
14/779,038
Granted
May 30, 2017
Kind
B2
Abstract

A front fork includes a pair of dampers standing on both sides of a wheel. One of the pair of dampers is a magnetic viscous fluid damper configured to use a magnetic viscous fluid whose viscosity is changed by an action of a magnetic field as a working fluid, while the other of the pair of dampers is a liquid-pressure damper configured to use a liquid such as oil, water, an aqueous solution and the like as the working fluid.

Claims (9)

1. A front fork, comprising:

a pair of dampers standing on both sides of a wheel, the pair of dampers including a magnetic viscous fluid damper and a liquid-pressure damper,

the magnetic viscous fluid damper being configured to generate a damping force using a magnetic viscous fluid as a working fluid, a viscosity of the magnetic viscous fluid varying depending on a magnetic field strength applied to the magnetic viscous fluid,

the liquid-pressure damper being configured to generate another damping force using a liquid including oil, water, or an aqueous solution as the working fluid.

2. The front fork according to claim 1 , wherein an extension-side damping force generated by the liquid-pressure damper is set higher than a compression-side damping force generated by the liquid-pressure damper.

3. The front fork according to claim 1 , wherein the magnetic viscous fluid damper generates a compression-side damping force in the front fork; and

the magnetic viscous fluid damper includes a coil configured to generate a magnetic field when electric current is supplied to the coil, and is capable of adjusting the viscosity of the magnetic viscous fluid by adjusting an amount of the electric current supplied to the coil.

4. The front fork according to claim 1 , wherein the liquid-pressure damper generates a minimum required compression-side damping force in the front fork.

5. The front fork according to claim 1 , wherein a compression-side damping force generated by the magnetic viscous fluid is greater than a compression-side damping force generated by the liquid-pressure damper.

Assignments (2)
CHANGE OF NAME Recorded Dec 21, 2015
From: KAYABA INDUSTRY CO., LTD.
To: KYB CORPORATION
Reel/Frame 037355/0142 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 22, 2015
From: MOCHIZUKI, TAKAHISA; ITO, NAOKI; SAITO, KEIJI
To: KAYABA INDUSTRY CO., LTD.
Reel/Frame 036618/0555 →
Priority Claims (1)
JP 2013-065545 · Mar 27, 2013 · national
Continuity (1)
Related Publication 20160052589A1 · Feb 25, 2016