Kajima Corporation

Kayaba Kogyo Kabushiki Kaisha

Kayaba Industry Company, Ltd.

Takeharu Shizume

Toshiaki Kamei

Koji Ishii

Takuji Kobori

Naoki Niwa

Kenichi Yano

Motoichi Takahashi

Junichi Hirai

Yoshinori Adachi

Yasukuni Watanabe

Shigeru Ariki

Hiroshi Midorikawa

In a caster which supports a wheel by using via a link a bracket to be fitted to a wheelchair or the like, an end of the link is connected with a rotation axis of the bracket via a rubber member which is twisted and deformed resulting from oscillating motion of the link and the link and the bracket are connected by a hydraulic damper which damps the oscillating motion of the link whereby an oscillation or a shock can be absorbed.

Caster

A hydraulically-operated piston device installed between the frame of a structure and a vibration-resisting element provided separately from the frame varies the rigidity of the frame by changing the condition of connection between the frame and the vibration-resisting element. A valve controls the operation of the piston device and can be adjusted to change the coefficient of damping of the piston device. To obtain maximum rigidity of the frame, the piston is hydraulically locked in place. For maximum flexiblity of the frame, the piston can be hydraulically released from a locked position to move freely. Hydraulic resistance to movement of the piston can be graduated by metering the flow of oil into and out of the piston device. The coefficient of damping is a function of the metered flow of hydraulic fluid in the piston device.

Cylinder lock device for use in structure

A vibration-proof and earthquake immune mount system connecting machinery or a structure to a foundation which may be subject to external vibrations or earthquakes. The mount system includes a number of mounts operating in conjunction with a number of dampers, and both the mounts and the dampers function regardless of the direction of the external disturbance. In the mount this ominidirectionality is achieved by using a low-friction rolling contact between a ball attached to the machinery or structure and a dished surface attached to the foundation. Damping is provided by eddy current dissipation when a conductor plate attached to the structure of machinery and free to move in two directions is placed between the poles of an electromagnet which is integral with the foundation, and activated by a controller energized when a sensor detects motion of the foundation.

Vibration-proof and earthquake-immue mount system

Growing community of inventors

Kangawa, Japan

Takeharu Shizume