IPC Main Group
B21K 21/00 Making hollow articles not covered by any single one of groups
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- Subclass:
- MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
Related Keywords
making HOLLOW-WARE of metal
6 direct subcodes
Child Classifications
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- B21K 21/02 Producing blanks in the shape of discs or cups as semi-finished articles for making hollow articles, e.g. to be deep-drawn or extruded
- B21K 21/04 Shaping thin-walled hollow articles, e.g. cartridges
- B21K 21/06 Shaping thick-walled hollow articles, e.g. projectiles
- B21K 21/08 Shaping hollow articles with different cross-section in longitudinal direction, e.g. nozzles, spark-plugs
- B21K 21/12 Shaping end portions of hollow articles
- B21K 21/16 Remodelling hollow bodies with respect to the shape of the cross-section