A power tool includes a housing. A motor is housed in the housing. A platen is driven by the motor. The housing includes a first housing part, a second housing part and a third housing part. The housing defines a battery receptacle portion configured to receive a removable battery pack which powers the motor. Each of the first housing part, the second housing part and the third housing part form part of the battery receptacle portion.

A hand-held machine tool having a, in particular rod-shaped, handle element for an operator to grasp and having a machining head, which is movably mounted on the handle element by means of a joint assembly and which has an electric drive motor for driving a tool holder for holding a machining tool, wherein a bottom side of the handle element and a machining side of the machining head face a workpiece in a base position of the machining head, wherein the joint assembly is connected to the machining head in an articulated-connection region of the machining head, wherein a flexible suction hose for conducting a suction flow from the machining head to the handle element extends between the handle element and the machining head, which suction hose is fastened to an end region of the handle element by means of a first hose end and to a suction connection of the machining head by means of a second hose end.

An arrangement for cooling a spindle bearing or bearings of an abrading apparatus with rotating abrading members is disclosed. This is premised on arranging in a housing of the abrading apparatus conduits which extend from a spindle bearing chamber wall of the housing to an inner suction chamber wall of the housing. Via such conduits, hot air may be expelled from a spindle bearing chamber of the housing as an overpressure in front of a protruding balancer element of a rotating shaft balancer is discharged from the spindle bearing chamber via a conduit into a suction chamber. Cool air may be conveyed from a suction chamber into the spindle bearing chamber as an underpressure behind the protruding balancer element draws in air from the suction chamber via the conduit to the spindle bearing chamber.

An angle grinder (200), which includes a gear neck (210) for connecting a dust hood (100, 100′) equipped with a flange (90), the angle grinder (200) including a sensor unit (20), with the aid of which it is possible to detect which type of dust hood (100, 100′) is connected to the angle grinder (200), the angle grinder (200) also including rotational direction control electronics (230), which are connected by signals to the sensor unit (20) in such a way that the rotational direction (GGD, GLD) of a cutting wheel (220) of the angle grinder (200) is predefined as a function of the dust hood type detected by the sensor unit (20).

A power tool is provided including a having a field case portion and a gear case portion, a motor disposed in the field case portion of the housing, a fan rotatably connected to the motor, intake conduits disposed along the housing, and a particle separation assembly in fluid communication with the intake conduits. The particle separation assembly includes a baffle and a centrifugal chamber, where the baffle is operable to direct airflow from the intake conduits into the centrifugal chamber in a cyclonic path, and the centrifugal chamber includes a radial gap forming a particle dispersion port in the cyclonic path of the airflow to eject contamination from the airflow. Additionally or alternatively, the centrifugal chamber includes air-directing fins arranged angularly to direct contamination from the airflow towards the particle dispersion port.

A device for automatically removing a grinding wheel from a grinding machine mounted on a manipulator is described. According to one embodiment, the device has the following: a support plate with a surface for depositing a grinding wheel; a movable clamping element that is raised in a first position with respect to the support plate; an actuator that is coupled to the clamping element and is configured to move the clamping element into a second position in which the clamping element is pressed against the support plate such that the grinding wheel is clamped between the support plate and clamping element; and a release element that is arranged in such a way relative to the support plate that the release element is actuated when the grinding wheel is placed on the surface of the support plate and is pressed against the latter. The release element and the actuator are coupled (directly or indirectly, electrically or mechanically) such that, when the release element is actuated, the actuator moves the clamping element from the first position into the second position.

A cyclone dust collecting device includes a dust collecting box and a separator. The dust collecting box includes a dust entrance and a cavity formed by extension in a first direction. The dust entrance communicates with a dust exhaust channel of a host machine. The separator includes a dust inlet and a cyclone tube. The dust inlet communicates with the dust entrance. The dust inlet is configured to guide the dust exhaust airflow into the cyclone tube. The cyclone tube extends in a second direction and is at least partially disposed in the dust collecting box. The cyclone tube includes a dust outlet and an air outlet. The dust outlet is located in the cavity and the air outlet communicates with an outside of the dust collecting box. The second direction obliquely intersects the first direction.

A dust hood extension device for use with a dust hood of a grinder includes a supporting device where the supporting device is configured to surround the dust hood and an opening defined by the dust hood extension device. The opening is arranged eccentrically with respect to a central axis of a drive shaft of the grinder in a fastened condition of the dust hood extension device on the dust hood of the grinder.

A dust removal assembly for use with a disc grinder includes a base portion with a member defining a major surface, a wall extending at least partially along an outer periphery of the major surface, an exhaust port contained within the wall, and a first ledge positioned proximate the exhaust port extending along the major surface. A top plate, attachable to the wall, includes a second ledge extending downward from a lateral edge toward the base portion such that the first ledge and the second ledge are positioned proximate to, and extend horizontally parallel to, one another. Both the first ledge and the second ledge are configured to permit a circular disc to travel therebetween. A compartment in fluid communication with an exhaust port is defined by the first ledge, the wall and a minor surface positioned below the major surface.

The present invention relates to a floor treatment apparatus (1) and method for treating a floor. The apparatus comprises: •—a housing (10) comprising a top plate (11), and •—a drive system comprising: •—a transmission (21) arranged above the top plate (11), the transmission (21) comprising a transmission shaft (22) passing through an aperture in the top plate (11), •—a motor (23) attached to the transmission (21), the motor (23) arranged above the top plate (11), •—a rotatable drive plate (24) attached to the transmission shaft (22) and positioned below the top plate (11), and •—a coupling member (25) attached to a bottom of the drive plate (24) and arranged to couple a treatment member (26) for treating a floor surface, by engagement on said floor surface, to the drive plate (24), wherein the floor treatment apparatus comprises an open-ended tubular casing extending from a central aperture in the drive plate (24) through the housing (10) to an outlet opening (15) of the housing (10) to which a fluid conduit is connectable, wherein the casing is arranged for a fluid to flow through it.