A cooling device for a rotating machine has a fan assembly coupled with a backing plate. A hub, on the backing plate, secures the cooling device with a shaft. The backing plate includes one or more vents to enable air to exit the cooling device. The fan includes an opening to enable air to enter the cooling device. A chamber is formed between the fan assembly and the backing plate. During rotation, air is drawn into the opening. The air is passed into the chamber and exits through the vents to cool a work surface or working pad attached to the backing plate.

A cooling device for a rotating machine has a fan assembly coupled with a backing plate. A hub, on the backing plate, secures the cooling device with a shaft. The backing plate includes one or more vents to enable air to exit the cooling device. The fan includes an opening to enable air to enter the cooling device. A chamber is formed between the fan assembly and the backing plate. During rotation, air is drawn into the opening. The air is passed into the chamber and exits through the vents to cool a work surface or working pad attached to the backing plate.

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.

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.

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.

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.

A polishing apparatus is provided with a machining head that is supported to freely move in two horizontal directions; driving devices that enables the machining head to move; a polishing jig that is supported by the machining head to freely move in a vertical direction; a polishing member that is mounted on a lower end portion of the polishing jig; an air cylinder polishing jig moving device that moves the polishing jig and is capable of pressing the polishing member against a tube support plate; and a drive motor that is capable of rotating the polishing jig, thus, simplification of the structure is made possible.

A polishing apparatus is provided with a machining head that is supported to freely move in two horizontal directions; driving devices that enables the machining head to move; a polishing jig that is supported by the machining head to freely move in a vertical direction; a polishing member that is mounted on a lower end portion of the polishing jig; an air cylinder polishing jig moving device that moves the polishing jig and is capable of pressing the polishing member against a tube support plate; and a drive motor that is capable of rotating the polishing jig, thus, simplification of the structure is made possible.

An extender for a buffing pad assembly having a first portion configured to be rotated, thereby transferring power from a power tool to a buffing pad, and a second portion that can be held by a user to support, direct, and/or control the buffing pad during operation of the power tool. The extender preferably includes a shaft, a sleeve, and at least one retainer for fixing the sleeve onto the shaft. The shaft preferably includes a first portion near a first end, a second portion near a second end, and a third circular portion located therebetween. In one embodiment, the shaft includes first and second grooves, thereby allowing a first retainer (e.g., C-clip) to be snapped into the first groove, the sleeve slid over the open end of the shaft, and a second retainer (e.g., C-clip) snapped into the second groove, resulting in a fully assembled extender.