Makita Corporation

Makita Electric Works, Ltd.

Hideki Tanaka

Fusao Fushiya

Shigeki Yamauchi

Portable electric screwdriver

Portable electric wrench

A power driven tool for crimping a collar fitted on a shank of a rivet inlcudes an outer sleeve mounted on a body and having a portion for press fitting on an outer surface of the collar, and an inner sleeve disposed within the outer sleeve and reciprocally movable in an axial direction. The inner sleeve has a chuck for grasping the shank of the rivet. A drive shaft is threadably inserted within the inner sleeve and is driven by a motor in one direction or the other. A cam mechanism is disposed between the outer sleeve and the inner sleeve and includes a cam pin mounted on the outer sleeve, and a recess formed on the inner sleeve for engagement with the cam pin so as to prevent rotation of the inner sleeve relative to the outer sleeve. The recess includes a first relief portion and a second relief portion at both ends in an axial direction which permit rotation of the inner sleeve only in one direction and only in the other direction, respectively.

Growing community of inventors

Anjo, Japan

Hideki Tanaka