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)
Introduced: September 1968
Description
B24D covers abrasive tools and grinding wheels designed for material removal, surface finishing, and edge preparation operations. This subclass encompasses rotating wheels, stones, and mounted abrasives used in grinding machines, as well as honing and sharpening tools for cutlery and industrial implements. Included are various abrasive compositions, grain types, and bonding materials that affect tool performance and durability. Related grinding machine designs and their operational mechanisms are classified separately under B24B.
Title
Titles differ between systems:
IPC: TOOLS FOR GRINDING, BUFFING OR SHARPENING
CPC: 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)
Full Title
Full titles differ between systems:
TOOLS FOR GRINDING, BUFFING OR SHARPENING
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)
Additional Content IPC
Glossary
grinding Grinding means machining by fixed abrasive particles in its most general sense and covers "corrective" operations, such as correction of dimension, e.g. diameter, or shape, e.g. roundness. It is characterised by a comparatively high material removal rate. polishing Polishing means abrading a work so as to improve, e.g. smoothen, its surface, without substantial change of dimension or shape of the work as would occur in grinding.
Limiting references
Abrading-bodies specially designed for tumbling apparatus, e.g. abrading-balls Honing tools Lapping tools
Application references
Floor surfacing or polishing machines with driven tools Grinding discs or grinding worms specially adapted for use in machines for manufacturing gear teeth Tools specially designed, e.g. bowl-like, for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work
Of 12 combined children, 9 exist in both systems.
3 codes are CPC-only extensions.
Note: 3 CPC extensions are marked as secondary classification only.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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- B24D 11/00 Constructional features of flexible abrasive materials; Special features in the manufacture of such materials +2 CPC IPC+CPC Available in IPC and CPC
- B24D 13/00 Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor IPC+CPC Available in IPC and CPC
- B24D 15/00 Hand tools or other devices for non-rotary grinding, polishing, or stropping IPC+CPC Available in IPC and CPC
- B24D 18/00 Manufacture of grinding tools , e.g. wheels, not otherwise provided for since 1985 +10 CPC IPC+CPC Available in IPC and CPC
- B24D 3/00 Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents +4 CPC IPC+CPC Available in IPC and CPC
- B24D 5/00 Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor IPC+CPC Available in IPC and CPC
- B24D 7/00 Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor +1 CPC IPC+CPC Available in IPC and CPC
- B24D 9/00 Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper +2 CPC IPC+CPC Available in IPC and CPC
- B24D 99/00 Subject matter not provided for in other groups of this subclass since 2010 +1 CPC IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class B24,2013–2023, worldwide · Source: EPO PATSTAT
- DISCO ABRASIVE SYSTEM 3,084
- APPLIED MATERIALS US 1,570
- EBARA CORPORATION JP 1,393
- DISCO CORPORATION JP 1,368
- 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 1,270
- EBARA CORPORATION 1,016
- FUJIMI JP 829
- ZHEJIANG UNIVERSITY OF TECHNOLOGY 804
- ROBERT BOSCH DE 803
- SAINT-GOBAIN ABRASIVES US 781
Top Applicants (CPC)
Class B24,2013–2023, worldwide · Source: EPO PATSTAT
- DISCO CORPORATION JP 2,092
- APPLIED MATERIALS US 1,813
- EBARA CORPORATION JP 1,804
- 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 1,329
- ROBERT BOSCH DE 863
- FUJIMI JP 858
- SAINT-GOBAIN ABRASIVES US 833
- EBARA CORPORATION 810
- SAINT-GOBAIN ABRASIVES FR 782
- DISCO ABRASIVE SYSTEM 735