IPC Subgroup
B21B 39/2 Revolving, turning-over, or like manipulation of work
Introduced: September 1968
Last revised: January 2006
Full Title
Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills > Revolving, turning-over, or like manipulation of work
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- Subclass:
- ROLLING OF METAL
Related Keywords
MANIPULATORS for use with rolling millsmanipulators for ROLLING mills
6 direct subcodes
Child Classifications
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- B21B 39/22 by tipping, e.g. by lifting one side by levers or wedges
- B21B 39/24 by tongs or grippers
- B21B 39/26 by members, e.g. grooved, engaging opposite sides of the work and moved relatively to each other to revolve the work
- B21B 39/28 by means of guide members shaped to revolve the work during its passage
- B21B 39/3 by lodging it in a rotating ring manipulator or ring segment manipulator
- B21B 39/32 Devices specially adapted for turning sheets
Top Applicants
Top 10 applicants by patent filingsfor class B21, 2013–2023, worldwide · Source: EPO PATSTAT
- JFE STEEL 2,318
- JFE STEEL JP 2,294
- POSCO (POHANG IRON AND STEEL COMPANY) KR 2,083
- NIPPON STEEL CORPORATION JP 1,650
- NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 1,631
- SMS GROUP DE 1,472
- BAOSHAN IRON & STEEL COMPANY 1,181
- SGCC(STATE GRID CORPORATION OF CHINA) 1,079
- ANHUI JIANGHUAI AUTOMOBILE 984
- HYUNDAI STEEL COMPANY KR 980