DIFF Subgroup
B23B 31/02 Chucks
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Chucks; Expansion mandrels; Adaptations thereof for remote control > Chucks
CPC:
Chucks ; Expansion mandrels; Adaptations thereof for remote control (faceplates B23Q1/50; rotary devices holding by magnetic and/or electrical force acting directly on work B23Q3/152) > Chucks
Of 14 combined children, 9 exist in both systems.
5 codes are CPC-only extensions.
2 shared codes have differing titles between IPC and CPC.
Child Classifications
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- B23B 31/06 Features relating to the removal of tools; Accessories therefor IPC+CPC Available in IPC and CPC
- B23B 31/10 characterised by the retaining or gripping devices or their immediate operating means +2 CPC IPC+CPC Available in IPC and CPC
- B23B 31/24 characterised by features relating primarily to remote control of the gripping means IPC+CPC Available in IPC and CPC
- B23B 31/34 with means enabling the workpiece to be reversed or tilted IPC+CPC Available in IPC and CPC
- B23B 31/36 with means for adjusting the chuck with respect to the working-spindle IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class B23,2013–2023, worldwide · Source: EPO PATSTAT
- ITW (ILLINOIS TOOL WORKS) US 3,407
- FANUC JP 3,120
- DISCO ABRASIVE SYSTEM 2,777
- HAN'S LASER TECHNOLOGY INDUSTRY GROUP COMPANY 2,629
- ROBERT BOSCH DE 2,468
- FANUC 2,273
- DISCO CORPORATION JP 2,267
- GE (GENERAL ELECTRIC COMPANY) US 1,611
- CHINESE ACADEMY OF SCIENCES 1,534
- ISCAR IL 1,499
Top Applicants (CPC)
Class B23,2013–2023, worldwide · Source: EPO PATSTAT
- ITW (ILLINOIS TOOL WORKS) US 3,642
- DISCO CORPORATION JP 3,316
- FANUC JP 3,111
- ROBERT BOSCH DE 2,711
- FANUC 2,163
- GE (GENERAL ELECTRIC COMPANY) US 2,113
- ISCAR IL 1,516
- SIEMENS DE 1,459
- LINCOLN GLOBAL US 1,433
- KOBE STEEL JP 1,423