Patent ID: 6139408
Filing Date: 2000-10-31
Classification: B23Q,B24B

Abstract:
A surface grinding machine comprising:a sun gear;an internal gear concentrically surrounding said sun gear;a plurality of carriers each having a hole formed therein configured to hold a work and having an upper surface and a lower surface, wherein said each of said plurality of carriers is engaged with both said sun gear and said internal gear and revolves around said sun gear;an upper surface plate disposed adjacent to said upper surface of said work and configured to grind said upper surface of said work and a lower surface plate disposed adjacent to said lower surface of said work and configured to grind said lower surface of said work; andat least one chucking means for retrieving said work from said hole of said carrier, wherein said chucking means is provided with a plurality of opening/closing claw members for chucking the outer periphery of said work and wherein said carrier comprises a plurality of edge cutouts formed therein and disposed adjacent said hole into which said claw members of said chucking means are inserted to retain the outer periphery of said work.