Patent ID: 7278910

Claim:
A scraping device, in combination with a floor sander that abrasively sands and removes a top layer of a wood or wood-like floor, the floor sander having a swivel support wheel with a rolling surface and side walls, the swivel support wheel swivelly attached to a support base of the floor sander by a pair of castor supports that depend downwardly from the support base the scraping device comprising: a frame member that is fixedly attached to the castor supports of the floor sander above the swivel support wheel whenever the floor sander is in an upright position; a scraper arm pivotally attached to the frame member, the scraper arm having a flat outer surface that has a U-shaped opening such that the scraper arm is positioned so as to depend downwardly in order to contact the swivel support wheel of the floor sander such that the opening faces downwardly whenever the floor sander is in the upright position and straddles the swivel support wheel so that the scraper arm contacts the rolling surface and the side walls of the swivel support wheels and scrapes the rolling surface and the side walls of the upwardly approaching swivel support wheel whenever the swivel support wheel is rotating along the floor; and a spring positioned between the frame member and the scraper arm for changing the pivotal relationship between the frame member and the scraper arm and thereby biasing the scraper arm onto the swivel support wheel.