A power tool includes a housing, an output shaft, and a tool holder connected to the output shaft. A rotor assembly is attached to the output shaft that is configured to be acted on by a fluid flow through the housing to cause rotation of the output shaft. A centrifugally movable fluid flow governor is coupled to the output shaft that is configured to move outwardly from the output shaft to alter a force acting on the rotor assembly when the output shaft reaches a predetermined speed.

This invention discloses a wall polisher for building decoration of this invention, comprising a main body, a housing fixedly arranged on one end of the main body, a slot with an opening towards one end disposed in the housing, a handle fixedly set on the top end face of the main body, standing bases up and down symmetrically disposed on one end face of the main body, a pushing cushion which is fixedly connected to one end face of the main body arranged between the two standing bases; wherein the housing is attached on the rough wall surface with the handle held and the push force applied to the pushing cushion; a dust collecting device which is dismountable disposed on the bottom of the housing; wherein the dust produced during polishing is collected by the dust collecting device, which prevents the dust from spreading to pollute the environment.

The present invention relates to a floor grinding apparatus (100) with a housing (110) having an interior space (111) open to one side, a carrier plate (120) rotatably mounted in the interior space (111) for receiving abrasives, and drive unit (130) adapted to rotate the carrier plate (120), the housing (110) having an inner dust sealing ring (112) with at least one recess (115), wherein the inner dust sealing ring (112) divides the interior space (111) into an inner portion (113) and an outer portion (114), and wherein the carrier plate (120) is disposed in the inner portion (114), at least one extraction opening (116) disposed in the outer portion (114), and an outer dust sealing ring (117) enclosing the interior space (111), the inner dust sealing ring (112) and the outer dust sealing ring (117) being arranged to define a common working plane parallel to the plane of rotation of the carrier plate (120).

A hand-held machine tool, in particular a sanding machine, including a handle element for the user to grip and a processing head which has an electric drive motor for driving a tool holder provided for holding a processing tool, the hand-held machine tool having a power supply system for supplying power to the drive motor by means of a cable arrangement, via which the drive motor and the power supply system are interconnected. A protection circuit including at least one electric disconnector is arranged on the drive motor, in order to disconnect a connection between at least one electric cable of the cable arrangement and a phase of a field coil arrangement of the drive motor, which phase can be supplied with current via the cable.

A mobile machine tool for processing a surface of a workpiece or of a room having a working device which is mobile with respect to a surface of the workpiece or room, which working device includes a tool receptacle for a work tool driven or drivable by a drive motor and/or a coating device having a coating tool for coating the surface, wherein the working device includes a suction device for suctioning the working device onto the surface by means of at least one force component oriented in a normal direction of the surface, wherein the suction device has at least one valve for controlling an intake air flow and/or a negative pressure in a suction region of the working device for suction onto the surface, and wherein the at least one valve has a valve member which is adjustable between at least two valve positions in which a flow cross-section of the valve is different. The suction device includes a suction controller for adjusting the valve member during operation of the work tool or the coating device between its valve positions depending on at least one physical variable.

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.

Herein is disclosed a floor grinder. The apparatus includes a self propelled vehicle having a driver seat mounted on a top portion and facing a front end of the vehicle and a steering mechanism mounted adjacent the driver seat. Three separate grinders are releasably attached to the vehicle by three elongated mounting arms which position the three grinders adjacent each other in front of the vehicle. One of the grinders is positioned directly in front of the vehicle slightly forward of the remaining grinders. The remaining grinders are position to the left and right of the forward grinder by their mounting arms which mount to a left and right side of the vehicle, respectively. Each of the mounting arms are pivotally coupled to the vehicle to permit the mounting arms to pivot up and down relative to the vehicle.

This grinding wheel tool is provided with a cylindrically shaped head unit comprising a hollow area passing through the inside, and abrasive grains adhered across the entire outer peripheral surface of the head unit. A fluid is supplied in the hollow area, and in the head unit, communication holes are formed which communicate between the hollow area and the outer peripheral surface and which, from the radial direction of the head unit, are angled forwards in the direction of rotation. Hereby, it is possible to provide a grinding wheel tool which can greatly reduce clogging even in cases where a high amount of cutting chips are generated per unit time, such as in high-feed processing.

Disclosed is an invention that offers improvements to machines used for power floor buffing, grinding, and polishing including: a dust containment system which utilizes a single shroud with an attached lower brush to fully enclose the top and sides of a rotating implement whereas said shroud is spring loaded and allowed to move vertically and tilt in order to maintain firm contact with the floor at all times and prevent escaping air and dust; a dust extraction and collection system that expands upon said dust containment system by integrating a scroll shaped channel into the shroud and an outlet chute to extract and collect dust in a filtered dust bag and in which performance is increased by fins on the rotating implement driver and air inlet holes; a quick-release tool-less mechanism for attaching a rotating implement to the driveshaft with a hex shaped male/female interaction and push button release ball pin.

An apparatus for surface finishing includes a robot and an end effector. The end effector includes a compliance wrist having an axis of movement and coupled to the robot and a grinder tool coupled to the compliance wrist. The robot is configured to controllably position the end effector in three-dimensional space. The compliance wrist is configured to bias the grinder tool to a biased position relative to the robot and enable the grinder tool to move relative to the robot in response to an external force acting upon the grinder tool.