公开(公告)号：US20230341024A1

公开(公告)日：2023-10-26

申请号：US17726555

申请日：2022-04-22

Applicant: YAMASHITA RUBBER CO., LTD.

Inventor： Hideyuki SHIMIZU ,  Taiki KOSEKI

IPC: F16F9/53

CPC classification number: F16F9/535 ,  F16F2224/045

Abstract: A magnetorheological fluid with balanced viscosity and sedimentation properties includes: a magnetic material; a medium to allow the magnetic material to be dispersed therein; a dispersant to disperse the magnetic material within the medium while forming a magnetic material holding structure to hold the magnetic material; and a reinforcing agent to reinforce the magnetic material holding structure. An amount of the magnetic material is 25 wt % to 75 wt % relative to a sum of the medium and the magnetic material. An amount of the medium is 25 wt % to 75 wt % relative to the sum of the medium and the magnetic material. An amount of the dispersant is 0.5 wt % to 6 wt % relative to the sum of the medium and the magnetic material. An amount of the reinforcing agent is 5 wt % to 300 wt % relative to a weight of the dispersant.

公开(公告)号：US20230029434A1

公开(公告)日：2023-01-26

申请号：US17865404

申请日：2022-07-15

Applicant: YAMASHITA RUBBER CO., LTD. ,  HONDA MOTOR CO., LTD.

Inventor： Hideyuki SHIMIZU ,  Taiki KOSEKI ,  Toshio INOUE ,  Yuho ITO

IPC: H01F1/44

Abstract: A magnetorheological fluid utilizing properties of thixotropic agents and having well-balanced sedimentation properties includes: a magnetic material; a medium to allow the magnetic material to be dispersed therein; and at least one dispersant selected from sepiolite and smectite or a dispersant including sepiolite and bentonite.