Back to results
US 4,902,305 AGranted
Semi-cylindrical metal polishing element
AssigneeNippon Tenshashi Kabushiki Kaisha
InventorSachiko Ihata
Life of this patent
Estimating the term…
Abstract
A metal polisher 1 is semi-cylindrical in shape to permit polishing a protruded or a recessed surface portion of a workpiece. A number of grooves 4 are formed circumferentially on a surface on which polishing teeth 3 are formed so as to temporarily store chipped dust arising from a polishing operation and drain the dust as stored.
Claims1
A semi-cylindrical metal polisher made by the process comprising the steps of:
- providing a flat metal matrix having a plurality of polishing teeth raised and integrally formed on a surface thereon;
- shaping said flat metal matrix with a die set comprising a semi-cylindrical die having a plurality of circumferentially extending convex line portions on its face to thereby provide a semi-cylindrical metal matrix having a plurality of circumferential grooves on its surface with the polishing teeth present on said flat metal matrix in the regions of said convex line portions of said female die being crushed and flattened at the bottom of said grooves as said semi-cylindrical metal polisher is shaped.
Dependencies are inferred from the claim text.