Hitachi Koki Co., Ltd.

Kazumi Takeishi

Yasunori Ogawa

Takahiko Shimada

Siyouiti Sakamoto

Atsushi Nakagawa

Hiroaki Orikasa

Kazumi Tanaka

Junji Nakagawa

A motor is housed in a main body and a transmission gear of a series of three transmission gears is mounted to a motor shaft. The last of the series of transmission gears is mounted on one end of an elongated and distortable connection rod. A first bevel gear is attached to the other end of the connection rod. A second bevel gear, which in engagement with the first bevel gear, is attached to one end of a spindle. The spindle extends in a direction perpendicular to the direction in which the connection rod extends. A wheel shaped bit is attached to the other end of the spindle. Rotation of the motor is transmitted to the bit via the three transmission gears, the connection rod, the two bevel gears, and the spindle. To cut a workpiece, the rotating bit is repeatedly moved back and forth into the surface of the workpiece. A handle is attached to the main body and extends in a plane which contains an axis of the motor shaft. A secondary handle with a grip is attached to the main body so that the grip is positioned to intersect the plane.

Electric-powered stone cutter

A saber saw assembly includes a vice for clamping an object to be cut and a saber saw having a saw blade to be operated in reciprocating motion. The saber saw is arranged to cut the object with the reciprocating saw blade while the object is clamped by the vice. The vice is in the form of a pipe wrench. The pipe wrench clamps the object when rotated in a clamping direction while releases the object when rotated in a releasing direction opposite to the clamping direction. Accordingly, by using the pipe wrench for the vice, the clamping and releasing operations for the object are simplified to enhance the working efficiency for cutting the object.

Saber saw assembly with improved vising mechanism

Portable electric saw

Orbital sander

An orbital finishing sander includes a sandpaper clamp mechansim which has a sandpaper holder angularly movably supported on a bottom plate. A sanding sheet placed over a platen attached to the bottom plate is gripped by gripping teeth of the sandpaper holder under the bias of a spring. When a lever mounted on a frame of the sander is turned through about 90.degree., a presser on one end of the lever successively cams slanted and flat surfaces of the sandpaper holder downwardly to lift the gripping teeth off the bottom plate, thus releasing the sanding sheet. The sanding sheet is removed, and a new sanding sheet is placed on the platen, after which the lever is turned back to allow the gripping teeth to grip the new sanding sheet under the spring force.

Sandpaper clamp mechanism for orbital finishing sander

Growing community of inventors

Katsuta, Japan

Kazumi Takeishi