Shimizu Construction Co., Ltd.

Kyowa Precision Instruments Corp.

Hideo Nakajima

Yutaka Saito

Takanori Sato

Yasushi Watanabe

Toru Ito

Yasukazu Nakamura

Yoshihiro Orito

A bone adjuster has a first lift plate to be fastened to one of two opposed bone fragments to be adjusted, a second lift plate to be fastened to the other bone fragment and an adjusting shaft which is extended between both the lift plates and to adjust a space between the fragments. The first lift plate comprises a mounting plate and a screw-in connecting portion which is connected with the mounting plate via a hinge and in which the adjusting shaft is screwed to be supported. The second lift plate also comprises a mounting plate and a catching portion which is rotatably fixed to the mounting plate via a hinge to catch the leading end of the adjusting shaft . The screw-in connecting portion and the catching portion are supported on the mounting plates and at a desired angle by the hinges and , so that the mounting plates can be installed parallel to each other even when the bone fragments are skewed so as to appropriately hold the adjusting shaft

Bone adjuster

A concrete filled steel tube column which includes: a steel tube connected to beams of a structure so that an axial compressive load is transferred from the beams to the steel tube; and a concrete core, disposed within the steel tube, for bearing an axial compressive load transferred from the beams via the steel tube to the concrete core. The steel tube has a plurality of prestressed tube pieces concentrically joined in series. Each of these tube pieces has an axial prestress introduced into it to counteract a stress resulting from the compressive load applied to the steel tube. With this arrangement, substantially no axial stress is induced in the steel tube. In constructing the column, a steel tube piece is erected, and beams are joined to the tube piece. An axial tensile load is applied to the tube piece so that an axial stress is induced in the tube piece. After the application of the load, concrete is charged into the tube piece. After the concrete is cured, the tensile load is released from the tube piece so that the concrete core is subjected to an axial compression as a reaction to the application of an axial tension to the tube piece. Another tube piece is coaxially joined to an upper end of the concrete filled tube piece. Thereafter, the above-mentioned steps from the beam-joining step to the tube piece-joining step are repeated a plurality of times.

Concrete filled steel tube column and method of constructing same

Growing community of inventors

Tokyo, Japan

Hideo Nakajima