# US 8,784,163 B2 · Sanding apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,784,163 B2 - Document ID: US8784163B2 - Status: Granted - Kind: B2 - Application number: 13/061,619 - Filed: 2009-08-20 - Published: 2011-08-25 - Granted: 2014-07-22 - Earliest claimed: 2008-09-01 - Assignees: Hire Technicians Group, Ltd. - Applicants: Mark Graham Rogers - Inventors: Mark Graham Rogers - Web page: https://patentgrep.com/patent/US8784163B2 ## CPC - B24D 9/04: Rigid drums for carrying flexible material - B24D: TOOLS FOR GRINDING, BUFFING OR SHARPENING (abrading-bodies specially designed for tumbling apparatus, e.g. abrading-balls B24B31/14; honing tools B24B33/08; lapping tools B24B37/11) ## Abstract Sanding apparatus comprises a rigid non-expanding cylindrical sanding drum (1) formed with splines on its outer surface (4) and a separate cylindrical cover (2) formed of elastomeric material fitted removably onto the drum and formed with splines on its inner surface (8) adapted to engage with the outer surface of the drum so as to be driven in rotation therewith. An abrasive tube (3) fits over the cover (2) and is gripped by the cover which expands radially when the apparatus is in operation. ## Claims ### Claim 1 A sanding apparatus comprising a rigid non-expandible cylindrical sanding drum of fixed dimensions formed with a splined outer surface and a separate cylindrical cover formed of elastomeric material fitted removably onto the drum and formed with a splined inner surface adapted to engage with the outer surface of the drum so as to be driven in rotation therewith; wherein the cover is not fixed or tethered to the drum but free to move radially away from the drum during rotation of the apparatus; wherein the apparatus further comprises a cylindrical abrasive sanding tube adapted to be loosely mounted over the cylindrical cover in the static condition such that radial expansion of the cover during rotation of the apparatus causes the cover to grip the abrasive tube and drive it in rotation. ### Claim 2 (depends on 1) The sanding apparatus as claimed in claim 1, wherein the splines of the drum and the cover have a generally stepped profile. ### Claim 3 (depends on 1) The sanding apparatus as claimed in claim 1, wherein the splines of the drum and the cover have a generally triangular or saw-toothed profile. ### Claim 4 (depends on 1) The sanding apparatus as claimed in claim 1, wherein the outer surface of the cover is formed with spaced axially extending radial grooves defining axially extending radial ribs therebetween. ### Claim 5 (depends on 1) The sanding apparatus as claimed in claim 1, wherein the outer surface of the cover is smooth. ### Claim 6 (depends on 1) The sanding apparatus as claimed in claim 1, wherein the cover is rotationally symmetrical about its axis. ### Claim 7 (depends on 1) The sanding apparatus as claimed in claim 1, wherein the cover is formed in two separate cylindrical sections. ### Claim 8 (depends on 2) The sanding apparatus as claimed in claim 2, wherein the cover is rotationally symmetrical about its axis. ### Claim 9 (depends on 3) The sanding apparatus as claimed in claim 3, wherein the cover is rotationally symmetrical about its axis. ### Claim 10 (depends on 4) The sanding apparatus as claimed in claim 4, wherein the cover is rotationally symmetrical about its axis. ### Claim 11 (depends on 5) The sanding apparatus as claimed in claim 5, wherein the cover is rotationally symmetrical about its axis. ### Claim 12 (depends on 2) The sanding apparatus as claimed in claim 2, wherein the cover is formed in two separate cylindrical sections. ### Claim 13 (depends on 3) The sanding apparatus as claimed in claim 3, wherein the cover is formed in two separate cylindrical sections. ### Claim 14 (depends on 4) The sanding apparatus as claimed in claim 4, wherein the cover is formed in two separate cylindrical sections. ### Claim 15 (depends on 5) The sanding apparatus as claimed in claim 5, wherein the cover is formed in two separate cylindrical sections. ### Claim 16 (depends on 6) The sanding apparatus as claimed in claim 6, wherein the cover is formed in two separate cylindrical sections. ### Claim 17 (depends on 8) The sanding apparatus as claimed in claim 8, wherein the cover is formed in two separate cylindrical sections. ### Claim 18 (depends on 9) The sanding apparatus as claimed in claim 9, wherein the cover is formed in two separate cylindrical sections. ### Claim 19 (depends on 10) The sanding apparatus as claimed in claim 10, wherein the cover is formed in two separate cylindrical sections. ### Claim 20 (depends on 11) The sanding apparatus as claimed in claim 11, wherein the cover is formed in two separate cylindrical sections.