Patent ID: 7169027

Claim:
Cylindric drum with replaceable grinding elements, comprising a cylindric drum provided at its circumferential edge with a number of recesses that each are adapted for accommodating a replaceable grinding element including retainer means in which are mounted a sandpaper, support brushes and/or retainer brushes, the recesses in the cylindric drum are made with inner side walls, the retainer means are made with corresponding outer side walls, and a wedge action between the inner side walls of the recesses and the outer side walls of the retainer means causing a squeezing force on the outer side walls of the retainer means directed in a circumferential direction and occurs during use, wherein, the retainer means are designed with grooves for fastening at least one sandpaper, support brush and/or retainer brush, and the grooves extend from upper sides of the retainer means and into the retainer means for forming at least one elastic and pliable flap which is disposed between the grooves and at least one of the outer side walls of the retainer means.