A handheld work apparatus includes a work tool. The work apparatus defines a longitudinal plane and includes a handle having a longitudinal axis. The blocking lever is mounted so as to be pivotable about a rotational axis. The blocking lever blocks the actuating lever in a blocking or disable position and enables the actuating lever for actuation in at least one operating enable position. In the direction of view perpendicular to the longitudinal plane, the longitudinal axis of the handle and the rotational axis of the blocking lever conjointly define an angle (?). The angle (?) lies in a range of from 10? to 60?.

A handheld work apparatus includes a work tool. The work apparatus defines a longitudinal plane and includes a handle having a longitudinal axis. The blocking lever is mounted so as to be pivotable about a rotational axis. The blocking lever blocks the actuating lever in a blocking or disable position and enables the actuating lever for actuation in at least one operating enable position. In the direction of view perpendicular to the longitudinal plane, the longitudinal axis of the handle and the rotational axis of the blocking lever conjointly define an angle (?). The angle (?) lies in a range of from 10? to 60?.

A collision sensing system includes an outer housing with a ball roller mounted thereto, a piston, a lower housing, and an electro/mechanical switch assembly having a contact ring. The piston includes a helical groove on its exterior and a tongue extending from a lower end thereof. The ball roller is positioned within the helical groove of the piston. The lower housing has a semi-spherical portion and a groove aligned with the piston tongue. A contact pin assembly extends through the piston and includes a contact pin positioned to contact the contact ring. The collision sensing system is configured such that deflection of a welding torch mounted to the lower housing misaligns the tongue and groove, slides the helical groove along the ball roller, thereby lifting the piston and breaking contact between the contact pin and contact ring.

A collision sensing system includes an outer housing with a ball roller mounted thereto, a piston, a lower housing, and an electro/mechanical switch assembly having a contact ring. The piston includes a helical groove on its exterior and a tongue extending from a lower end thereof. The ball roller is positioned within the helical groove of the piston. The lower housing has a semi-spherical portion and a groove aligned with the piston tongue. A contact pin assembly extends through the piston and includes a contact pin positioned to contact the contact ring. The collision sensing system is configured such that deflection of a welding torch mounted to the lower housing misaligns the tongue and groove, slides the helical groove along the ball roller, thereby lifting the piston and breaking contact between the contact pin and contact ring.

A tool safety system and method of use thereof which includes a sensor device for detecting when personal protective equipment (PPE) is being worn or in proximity with an associated tool. Sensors may be included in the equipment to determine if the equipment is properly being worn, such as pressure or skin-contact sensors within gloves and hard hats, or contact switches for visors to detect that the visor is in a down position.

A tool safety system and method of use thereof which includes a sensor device for detecting when personal protective equipment (PPE) is being worn or in proximity with an associated tool. Sensors may be included in the equipment to determine if the equipment is properly being worn, such as pressure or skin-contact sensors within gloves and hard hats, or contact switches for visors to detect that the visor is in a down position.

A pressing tool for plastically deforming a workpiece is described. The pressing tool includes a housing and an electric motor for actuating the pressing tool. The pressing tool also includes an instrument seat which is adapted to receive an interchangeable instrument head at the housing. The pressing tool also includes a mechanical safety element which is arranged in a manner that is movable from an open position, in which an instrument head may be inserted into the instrument seat, into a closed position, in which the instrument head is locked in the instrument seat. The pressing tool additionally includes a mechanical actuating element which may interact with the safety element in order to be able to cause the pressing tool to be enabled for a pressing process.

A pressing tool for plastically deforming a workpiece is described. The pressing tool includes a housing and an electric motor for actuating the pressing tool. The pressing tool also includes an instrument seat which is adapted to receive an interchangeable instrument head at the housing. The pressing tool also includes a mechanical safety element which is arranged in a manner that is movable from an open position, in which an instrument head may be inserted into the instrument seat, into a closed position, in which the instrument head is locked in the instrument seat. The pressing tool additionally includes a mechanical actuating element which may interact with the safety element in order to be able to cause the pressing tool to be enabled for a pressing process.

A miter saw includes a base seat unit, a cutting unit rotatable relative to the base seat unit to bring a saw blade to rotate among a first working state, a second working state and a folded state, and a safety unit having at least one slide slot and a movable pin slidable along the slide slot. When the saw blade is in one of the first and second working states, the movable pin is retained in a first slot portion of the slide slot to permit operation of a trigger. When the saw blade is in the folded state, the movable pin is retained in a second slot portion of the slide slot to lock the trigger.

A miter saw includes a base seat unit, a cutting unit rotatable relative to the base seat unit to bring a saw blade to rotate among a first working state, a second working state and a folded state, and a safety unit having at least one slide slot and a movable pin slidable along the slide slot. When the saw blade is in one of the first and second working states, the movable pin is retained in a first slot portion of the slide slot to permit operation of a trigger. When the saw blade is in the folded state, the movable pin is retained in a second slot portion of the slide slot to lock the trigger.