Abstract: A an electric machine tool having a body to which a work tool is attached, a motor, and a battery. The body has a motor receiving chamber, a battery receiving chamber opening through an outer surface of the body, and a communication path through which the battery receiving chamber is in communication with the motor receiving chamber. A first air inlet opening is formed between the inner edge of an opening of the battery receiving chamber and the outer periphery of the battery disposed in the battery receiving chamber. Further, an inflow port of the communication path opens to an inner side surface of the battery receiving chamber and an air filter is fitted over the inflow port.

Abstract: A chain saw (1) (an electric machine tool) comprises a body (10), to which a cutter (a work tool) (20) is attached, a motor (30), and a battery (50). The body (10) has a motor receiving chamber (15), a battery receiving chamber (16) opening through an outer surface of the body (10), and a communication path (17), through which the battery receiving chamber (16) is in communication with the motor receiving chamber (15). A first air inlet opening (81) is formed between the inner edge of an opening of the battery receiving chamber (16) and the outer periphery of the battery (50) disposed in the battery receiving chamber (16). Further, an inflow port (17a) of the communication path (17) opens to an inner side surface of the battery receiving chamber (16) and an air filter (70) is fitted over the inflow port (17a).

Abstract: To reduce fatigue in the arm of an operator of a blow operation device driven by an electric motor and to realize a blow operation of blowing and gathering generated compressed air from both the right and left with a small operational burden. A blow operation device includes a backpack type frame, a battery attached to the frame, a blower body having an electric motor to which power is fed from the battery and having an axial fan driven by the electric motor, and a blower tube connected to a blow side of the blower body, the frame including a back contact surface, and the blower body being attached to the frame such that axial directions of the electric motor and the axial fan are along the back contact surface.

Abstract: In an operation using a blow operation device driven by an electric motor, fatigue in the arm of an operator is reduced. A blow operation device includes a backpack type frame, a battery attached to the frame, a blower body having an electric motor to which power is fed from the battery and having an axial fan driven by the electric motor, and a blower tube connected to a blow side of the blower body, the blower body being supported pivotally on the frame to be rockable vertically and horizontally.

Abstract: To reduce fatigue in the arm of an operator of a blow operation device driven by an electric motor and to realize a blow operation of blowing and gathering generated compressed air from both the right and left with a small operational burden. A blow operation device includes a backpack type frame, a battery attached to the frame, a blower body having an electric motor to which power is fed from the battery and having an axial fan driven by the electric motor, and a blower tube connected to a blow side of the blower body, the frame including a back contact surface, and the blower body being attached to the frame such that axial directions of the electric motor and the axial fan are along the back contact surface.

Abstract: A vise for clamping a work piece to a workbench. One jaw of the vise is permanently mounted to the work piece and the other is carried by the threaded shaft. A block member is mounted to the workbench spaced from one jaw a distance at least as great as the dimension of the largest work piece to be clamped between the jaws. A transfer mechanism carried by the block member includes a moveable female member adapted to be moved into and out of engagement with the threaded shaft. In the disengaged position, the shaft is freely slideable in the block member to permit rapid positioning of the shaft. In the engaged position, the shaft can be turned to powerfully clamp the work piece between the jaws.