Abstract: This is a belt drive arrangement in which two belts are used, the inside surface of one running in contact with the outside surface of the other for part of their lengths and both running within the width of one belt, with input and output shafts, and one or more idler pulleys providing forward or reverse rotation of the output shaft with the input shaft having a constant direction of rotation.

Abstract: A brush structure is provided including a laminated core of plastic sheet and fiber sheet. A laminated tube of plastic sheet and fiber sheet is also provided in the present invention.

Abstract: A power floor treating assembly having an improved arrangement for housing and mounting the rotary brush or other floor maintenance tool for sealing the brush or tool enclosure from ambient. The apparatus includes a main frame along with a powered output shaft for driving the rotary brush. Housing means are coupled to the frame to define a brush or rotary tool receiving enclosure, along with a solid debris receiving chamber which is in communication with the brush receiving enclosure. The rotary tool receiving enclosure is an enclosed sector having generally closed ends with transverse walls including a top wall, side walls, and with an open bottom. In addition, a solid-air separator is provided with a fluid evacuation port being formed in one of the brush enclosure walls.