Patent ID: 6685547
Filing Date: 2004-02-03
Classification: B24D

Abstract:
A pneumatic sanding roll, comprising:an elongate housing having an inside portion and a free outside driving axle separated from the inside portion by a large diameter disc, the driving axle having an air supply channel defined therin, the air supply channel extending along a central line thereof to a mouth of the driving axle at the inside portion of the housing; a spacer in operative engagement with the driving axle and the disc; a semi-spherical hollow flexible rubber socket having an open bottom edge portion at one end and a closed round top portion, the bottom edge portion having an opening defined therein, the bottom edge portion being captured between the spacer and the large diameter disc so that an enclosed cavity is defined inside the rubber socket, the rubber socket being movable between an air-filled expanded position and an unfilled collapsed position; an abrasive semi-spherical sleeve being arranged to enclose the rubber socket and to be locked to the rubber socket when the rubber socket is filled with air and expanded into the air-filled expanded position; and a rubber tube being sealingly arranged about the inside portion to cover the mouth of the air supply channel, the rubber tube preventing air in the cavity from leaking back out through the air supply channel.