IPC Subgroup
B23B 31/1 characterised by the retaining or gripping devices or their immediate operating means
Introduced: September 1968
Last revised: January 2006
Full Title
Chucks; Expansion mandrels; Adaptations thereof for remote control > Chucks > characterised by the retaining or gripping devices or their immediate operating means
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- Subclass:
- TURNING; BORING
6 direct subcodes
Child Classifications
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- B23B 31/103 Retention by pivotal elements, e.g. catches, pawls
- B23B 31/107 Retention by laterally-acting detents, e.g. pins, screws, wedges; Retention by loose elements, e.g. balls
- B23B 31/11 Retention by threaded connection
- B23B 31/113 Retention by bayonet connection
- B23B 31/117 Retention by friction only, e.g. using springs, resilient sleeves, tapers
- B23B 31/12 Chucks with simultaneously-acting jaws, whether or not also individually adjustable
Top Applicants
Top 10 applicants by patent filingsfor 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