A floor polishing or grinding pad assembly is provided. In one aspect, a polishing or grinding pad assembly employs a flexible pad, a reinforcement layer or ring, and multiple floor-contacting tools such as abrasive disks. In another aspect, the reinforcement layer includes a wavy or undulating internal edge shape. A further aspect includes an inner ring edge having radially extending slots between pairs of radially enlarged tool mounting peaks. Still another aspect includes an insulator or spacer between a head of an abrasive tool and a reinforcement ring.

An improved structure of water mill has a body provided with a handle part, a body part, a working head base and a pressing control switch. The handle part is provided with an intake passage, an exhaust passage, and a water inlet reversing passage. By triggering the pressing control switch, a high-pressure gas is guided into the intake passage and the body to drive the water grinder. A water pump gas outlet is provided with a double sleeve tube connected to a sealed water storage tank. The discharged high-pressure gas is guided into the sealed water storage tank through the outer tube of the double sleeve tube, so that the stored water is pressed back to the double sleeve tube and is simultaneously guided into the water inlet reversing passage. Finally, the water is guided out to the working head base, with simultaneous grinding and water cooling.

The present disclosure relates to a grinding disk of a ground grinding machine driven by a motor, including a chassis, wherein a working surface of the chassis is a separate flat disk, fixed devices are arranged on a lower surface of the chassis, and grinding blocks are fixedly installed through the fixed devices. Compared with the prior art, the present disclosure has the following advantages: the size of the grinding working surface of the separate grinding disk may be set freely by changing the arrangement mode of the grinding blocks; so as to reduce the starting torque and achieve the buffer effect; and mounting grooves may adopt the circumferential alternate arrangement or the radial alternate arrangement, so that the installed grinding blocks may compensate for each other, and the uniform and complete grinding is ensured while reducing the quantity of the grinding blocks.

Ways of providing efficient and cost-saving grinding of floors or of other similar surfaces by a grinding machine having replaceable grinding tools are disclosed. On an operator's console of the grinding machine, a number of parameters according to which the grinding machine is desired to operate are selected. Obtained measured values are fed back from the grinding machine via a control center to the operator's console, the grinding speed of the tools being arranged, via the operator's console, to be adjusted manually or that the same is automatically adjusted. Information about the wear of the tools is given to the operator's console from measuring members for the measurement. Apparatus implementing the ways are also disclosed.

A broom attachment is provided for a rotary sweeper assembly that includes a broom mount and a broom unit mountable to the broom mount. The broom attachment includes a plurality of broom attachment bristles and a support member having a retained portion and a retaining portion. The plurality of bristles extend from the retaining portion and the retained portion is operatively mountable to at least one of the broom mount and the broom unit. A broom assembly includes at least one broom attachment. When the broom attachment is operatively mounted to the broom mount, the broom attachment bristles are positioned at a greater radial distance away from an axis of rotation than the cleaning bristles of the broom unit. A method of assembling a broom attachment to a broom mount includes operatively mounting the retained portion to the broom mount.

A hand-held power tool, in particular a grinder, for simultaneously driving a plurality of grinding plates includes a main housing, which accommodates at least one motor for driving the grinding plates. A handle housing forms a handle and protrudes substantially perpendicularly to the main housing, and in particular the handle housing accommodates a storage battery. The hand-held power tool includes a motor having a drive shaft, which defines a motor axis, a central wheel, which is driven by the motor and defines a central wheel axis, and a plurality of, in particular three, output shafts, which are driven by the central wheel and define respective output shaft axes. Each output shaft is provided for driving one grinding plate or at least one grinding plate receptacle, and the motor axis is arranged eccentrically to the central wheel axis between a front output shaft axis and the central wheel axis.

A surface-treating tool is configured for coupling to an extension pole with opposed proximal and distal pole ends. The tool comprises a tool head including a rigid tool support having mutually opposed tool-support upper and lower surfaces. A pole coupling configured for selectively coupling the tool support to the pole distal end is affixed to the tool-support upper surface such that a coupled extension pole is pivotable relative to the tool support about mutually orthogonal first and second pivot axes. A tool pad includes a rigid plate with plate top and bottom surfaces and a resilient layer permanently adhered the plate bottom surface. The resilient layer includes an attachment surface to which a working material may be removably attached without tools. A pad fastener introduced through the resilient layer attaches the tool pad to the tool-support lower surface with the rigid plate between the tool support and the resilient layer.

A grinding device of a travel path, on which traveling wheels of a rail-type vehicle roll, includes a grinder which grinds a surface layer of a travel path, a frame on which the grinder is provided, and a device traveling wheel mounted on the frame. The device traveling wheel rolls along the travel path on the top surface of the standard rail extending in the extending direction of the travel path.

A method and apparatus is provided for treating a floor surface with zero-tolerance edging. The apparatus includes a frame and wheels mounted to the frame so the frame can travel over the floor surface. The apparatus also includes a motor mounted to the frame and a head assembly including a bottom plate. The bottom plate is operatively coupled to the motor so that the bottom plate is configured to rotate about a first axis. The bottom plate is positioned such that a tooling plate mounted to the bottom plate is configured to treat the floor surface including an edge of the floor surface intersecting a wall surface.

A method and apparatus is provided for treating a floor surface with zero-tolerance edging. The apparatus includes a frame and wheels mounted to the frame so the frame can travel over the floor surface. The apparatus also includes a motor mounted to the frame and a head assembly including a bottom plate. The bottom plate is operatively coupled to the motor so that the bottom plate is configured to rotate about a first axis. The bottom plate is positioned such that a tooling plate mounted to the bottom plate is configured to treat the floor surface including an edge of the floor surface intersecting a wall surface.