Makita Corporation

Makita Electric Works, Ltd.

Masahiko Ono

Toshiyuki Kani

Katsuhiko Sasaki

Shinji Hirabayashi

Syuji Aoyama

Manabu Tokunaga

Taiju Tsuboi

Fusao Fushiya

Kunio Amano

A dust-collecting device for collecting cutting chips produced by a cutting device has a separator for separating the cutting chips from the carrier air by utilizing the force of gravity upon the cutting chips. A dust container collects the cutting chips separated by the separator. The separator includes a separator body having a cutting chip discharge pipe and an air discharge pipe. After separation the carrier air is discharged upward from the separator body via the air discharge pipe. The separated cutting chips are discharge downward from the separator body via the cutting chip discharge pipe. The dust container is connected to the cutting chip discharge pipe.

Dust-collecting devices and cutting devices with the dust-collecting devices

A reciprocating saw includes a hexagonal head bolt (,) for releasably tightening a guide shoe (,) and a manually-operated bolt-tightening lever (,) fitted over the bolt (,). The bolt-tightening lever (,) includes a lock plate (,) which has at its front end a socket hole (,) that can fit around the head (,) of the hexagonal head bolt (,) and has a serrated edge with twelve notches each having an interior angle of 120 degrees. The lock plate (,) has at its rear end four engaging teeth (,) at intervals of four degrees around axis O of the hexagonal head bolt (,). The shape of the outer portion (,) is such that the outer portion can cover the lock plate (,). Moreover, the outer portion (,) has on its top side a circular hole (,) in which the head (,) of the bolt (,) can be fitted. The outer portion (,) includes also on its top side a compensation recess (,) in which the lock plate (,) is set and can pivot sixteen degrees in either direction about the axis O from the position in which the lock plate (,) is aligned with the outer portion (,). Formed at the rear end of the compensation recess (,) are a plurality of compensation teeth (,) that can mesh with the engaging teeth (,). The compensation teeth (,) span the 32 degree range in which the lock plate (,) pivots in the outer portion (,).

Cutting tool with an improved guide repositioning structure

A reciprocating saw includes a structure for sealing a chamber (,) which is defined by a gear housing (,) and a gear housing cover (,) fitted over the gear housing. The sealing structure includes a rubber packing (,) mounted along the entire length of the seam between the gear housing (,) and the gear housing cover (,). The rubber packing (,) is integrally formed with a V-shaped valve (,) such that a protrusion (,) at the bottom bend of the valve selectively opens and closes an air vent (,) formed in a partition wall (,) of the gear housing (,). The sealing structure further includes a seal retainer (,) and a dust seal (,) provided between the gear housing (,) and the gear housing cover (,) and penetrated by a reciprocating slider (,). The seal retainer (,) and the dust seal (,) lubricate the slider and seal the chamber (,) where the slider,penetrates the chamber.

Sealing structure for use in an electric power tool

A combination of a base attachment structure and a cutting tool, where the base attachment structure includes a connection bolt (8) inserted and movably fitted in an aperture (9a) formed in a curved plate (9) of a gear housing (2) and a cross-shaped slide aperture (11) formed in an arch-shaped projection member (10) extending from a base (7). The connection bolt (8) includes a first upper threaded portion (8a) having threads running in a first direction to form a left-handed screw, and a second lower threaded portion (8b) having threads running in a second direction, opposite to the first direction, to form a right-handed screw. The first threaded portion (8a) is fitted into a hole (12a) formed in a pressure plate (12), whereas the second threaded portion (8b) pierces into an aperture (13a) formed in an arch-shaped clamp plate (13) and is then screwed to a right-handed fixation nut (16). The curved plate (9) of the gear housing (2) and the arch-shaped projection member (10) of the base (7) are interposed between the pressure plate (12) and the clamp plate (13).

Base attachment structure applicable to cutting tools

Portable electric circular saw

Growing community of inventors

Anjo, Japan

Masahiko Ono