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    POWDER FOR ELECTROVISCOUS LIQUID AND ELECTROVISCOUS LIQUID USING THE POWDER
    42.
    发明专利
    POWDER FOR ELECTROVISCOUS LIQUID AND ELECTROVISCOUS LIQUID USING THE POWDER 失效

    公开(公告)号：JPH0790287A

    公开(公告)日：1995-04-04

    申请号：JP29752393

    申请日：1993-11-02

    Applicant: BRIDGESTONE CORP

    Inventor： SAKURAI MAKOTO ,  OGINO TAKAO ,  SAITO TASUKU ,  MIYANO MARI

    IPC: C10M103/02 ,  C10N20/06 ,  C10N40/14

    Abstract: PURPOSE:To provide powder for an electroviscous liquid use exhibiting high electroviscous effect at a low electric power demand through a wide temperature range and a non-aqueous electroviscous liquid using the powder having a low initial viscosity and high electrovlscous effect. CONSTITUTION:Powder for an electroviscous liquid use is composed of carbonaceous powder and has spherical shape, in which each deviation of the maximum diameter and the minimum diameter of a powder from the average diameter is optionally within 30% of the average diameter. The objective electroviscous liquid is obtained by dispersing the powder in an oily medium having electrical insulating property.

    PRODUCTION OF CARBONACEOUS POWDER
    45.
    发明专利
    PRODUCTION OF CARBONACEOUS POWDER 失效

    公开(公告)号：JPH05178603A

    公开(公告)日：1993-07-20

    申请号：JP15881492

    申请日：1992-05-26

    Applicant: BRIDGESTONE CORP

    Inventor： TAKAGI MITSUHARU ,  KIJIMA SHIGERU ,  KAWAGOE TAKAHIRO ,  KURACHI IKUO ,  SAITO TASUKU

    IPC: C01B31/02 ,  C08G73/00

    Abstract: PURPOSE:To efficiently produce a carbonaceous powder high in remained carbon ratio and excellent in electric conductivity without necessity of pulverizing or making infusible. CONSTITUTION:A polyaniline powder is calcined and carbonized in non-oxidizing atmosphere. By adjusting doping level of the polyaniline powder as a raw material remained carbon ratio and electric conductivity of the carbonaceous powder obtained are controlled.

    VIBRATION ISOLATING DEVICE
    46.
    发明专利
    VIBRATION ISOLATING DEVICE 失效

    公开(公告)号：JPH04370433A

    公开(公告)日：1992-12-22

    申请号：JP14497891

    申请日：1991-06-17

    Applicant: BRIDGESTONE CORP

    Inventor： SAITO TASUKU ,  ENDO SHIGEKI ,  ISHINO YUICHI ,  TAKANO KAZUYA

    IPC: F16F13/10 ,  F16F13/00 ,  F16F13/08 ,  F16F13/14

    Abstract: PURPOSE:To inhibit a movable body from moving in the case of a low frequency vibration so as to effectively absorb the vibration of frequencies over a wide range. CONSTITUTION:A liquid chamber 32 is divided into a main liquid chamber 32A and a sub liquid chamber 32B by a partition member 34. Both chambers 32A and 32B are connected to each other via a limiting passage 38, and are full of electroviscous fluid. Electrode plates 40, 42 are housed inside the limiting passage 38. An elastic body 50A, one side of which faces the main liquid chamber 32A while the other side of which faces the sub liquid chamber 32B, is disposed in the center of the partition member 34. An electrode plate 48 is secured onto a side of the main liquid chamber 32A of the elastic body 50A, thus constituting a movable body 50. An electrode plate 46 is fixed onto a side facing the electrode plate 48 on a flat top 34C of the partition member 34. In the case of vibration of low frequency, the electrode plates 46, 48 are energized so as to increase viscosity of the electroviscous fluid staying between the electrode plates 46 and 48, thus inhibiting a movable plate 50 from moving. Accordingly, the electroviscous fluid can effectively flow through the limiting passage 38, thereby obtaining large damping force. In the case of a high frequency vibration, the current application of the electrode plates 46, 48 is stopped so that the movable plate 50 is vibrated, causing a decrease in a dynamic spring constant.

    FLOW RATE REGULATING VALVE
    47.
    发明专利
    FLOW RATE REGULATING VALVE 失效

    公开(公告)号：JPH04236874A

    公开(公告)日：1992-08-25

    申请号：JP384291

    申请日：1991-01-17

    Applicant: BRIDGESTONE CORP

    Inventor： SAKURAI MAKOTO ,  SAITO TASUKU ,  ISHINO YUICHI

    IPC: F16K31/02

    Abstract: PURPOSE:To provide a flow rate regulating valve which uses electroviscous fluid and is reduced in size and weight and simple in structure. CONSTITUTION:A valve body 24 is contained in an inner cylinder 18 of a valve case 12 and separated away from a valve seat 26 through the energizing force of a compression coil spring 28. Electrodes 36 and 38 are arranged facing each other between the inner cylinder 18 and the valve case 12 and connected to a power source. During normal operation, electroviscous fluid flowing through a fluid inlet pipe 14 is freely discharged through a fluid flow passage 34 and a fluid outlet pipe 16. When a voltage is applied on the electrodes 36 and 38, viscosity of fluid in the fluid passage 34 is increased. Thereby, a fluid pressure is increased on the upper stream side, and since the valve body 24 is pressed against the valve seat 26 against the energizing force of the compression coil spring 28, movement of fluid is blocked. Since when energization to the electrodes 36 and 38 is disconnected viscosity of the fluid in the fluid passage 34 is reduced again, the valve body 24 is separated away from the valve seat 26 again through the energizing force of the compression coil spring 28 and the passage of fluid is practicable.

    POWDER AND ELECTROVISCOUS FLUID
    48.
    发明专利
    POWDER AND ELECTROVISCOUS FLUID 失效

    公开(公告)号：JPH04227997A

    公开(公告)日：1992-08-18

    申请号：JP9625691

    申请日：1991-04-02

    Applicant: BRIDGESTONE CORP

    Inventor： KURACHI IKUO ,  FUKUYAMA YOSHIKI ,  ENDO SHIGEKI ,  SAITO TASUKU

    IPC: C10M125/00 ,  C10M171/06 ,  C10N10/02 ,  C10N20/00 ,  C10N20/06 ,  C10N40/14 ,  H01B1/06 ,  H01B1/20

    Abstract: PURPOSE:To obtain a powder improved in oxidation resistance, heat stability and controllability of electric resistance, and permittivity by dispersing a particulate dispersed phase of a medium conductivity in a matrix phase of a low conductivity. CONSTITUTION:At least one matrix phase selected between a semiconductor and an insulator is mixed with 15-99.5wt.% particles having an electric conductivity of 10 -10 Scm which is at least 10 times as high as that of the matrix phase and a particle diameter of 1nm-1mum. The mixture is granulated by spray drying to obtain a powder of a mean particle diameter of 0.1-100mum, an electrical conductivity of 10 -10 Scm and a water content of 1wt.% or below. 1-60wt.% this powder is dispersed in 99-40wt.% insulating oil of a viscosity (at 25 deg.C) of 0.6-1000cSt to obtain an electroviscous fluid.

    POWDER AND ELECTROVISCOUS FLUID
    49.
    发明专利
    POWDER AND ELECTROVISCOUS FLUID 失效

    公开(公告)号：JPH04227796A

    公开(公告)日：1992-08-17

    申请号：JP9625491

    申请日：1991-04-02

    Applicant: BRIDGESTONE CORP

    Inventor： KURACHI IKUO ,  SAITO TASUKU

    IPC: B01J13/00 ,  C09K3/00 ,  C10M125/00 ,  C10M171/06 ,  C10N20/00 ,  C10N40/14 ,  F16D35/00 ,  H01B1/20

    Abstract: PURPOSE:To obtain powder consisting of complex particles in which electrically insulating fine particles are unevenly dispersed in a matrix phase having a specific electric conductivity in a state rich in the surface side and poor in the center side, and capable of exhibiting a high level electroviscous effect in wide temperature range for a long period. CONSTITUTION:Globes of phenol which is a thermosetting resin are impregnated with an ester orthosilicate for a whole day and night, and filtered and washed with ethanol and heated in distilled water containing toluenesulfonic acid at 40 deg.C for 8hr and dried. Then the globes are carbonized by heating at 600 deg.C for 1hr in an argon atmosphere to provide the powder consisting of complex particles 1 in which fine particles 3 are unevenly dispersed in a matrix phase 2 in a state rich in the surface side and poor in the center side or in a state poor in the surface side and rich in the center side. The matrix phase 2 has 10 to 10 Scm electric conductivity and contains these dispersed fine particles 3 consisting of one or more kinds of materials of semiconductor, insulator, etc., whose electric conductivities are

    RUBBER COMPOSITION
    50.
    发明专利
    RUBBER COMPOSITION 失效

    公开(公告)号：JPH04149253A

    公开(公告)日：1992-05-22

    申请号：JP27424990

    申请日：1990-10-12

    Applicant: BRIDGESTONE CORP

    Inventor： SAITO TASUKU ,  KURACHI IKUO ,  FUKUYAMA YOSHIKI ,  ISHINO YUICHI

    IPC: C08K9/00 ,  C08L21/00

    Abstract: PURPOSE:To obtain a rubber composition having surface roughness of >= a specific value, extremely improved sliding resistance, especially an improved coefficient of friction on ice and snow in a wet state by blending rubber with a specific amount of a specific filler having an average particle diameter in a specific range. CONSTITUTION:(A) 100 pts.wt. rubber is blended with (B) 3-150 pts.wt., preferably 5-100 pts.wt. one or more kinds of powder having 0.5-200mum, preferably 2-150mum average particle diameter selected from B1: fine powder comprising complex particles containing a fine particle phase in a matrix phase prepared by impregnating a metal compound to organic substance particles having high actual carbon ratio and carbonizing, and B2: fine particle comprising two-dimensional lamellar complex particles obtained by inserting an organic compound between layers of a substance (e.g. lamellar aluminosilicate or lamellar polysilicate) having a two-dimensional lamellar structure to give a rubber composition having >=2mum surface roughness.

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