DIFF Subgroup
B01D 33/15 with rotary plane filtering surfaces
Introduced: January 1990
Full Title
Full titles differ between systems:
IPC:
Filters with filtering elements which move during the filtering operation > with rotary plane filtering surfaces
CPC:
Filters with filtering elements which move during the filtering operation (filters comprising loose filtering material moving or fluidised during filtration B01D24/28 - B01D24/36; centrifuges B04B) > with rotary plane filtering surfaces
Of 4 combined children, 3 exist in both systems.
1 codes are CPC-only extensions.
1 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1990.
Child Classifications
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- B01D 33/17 with rotary filtering tables (tables divided into separately tiltable buckets, trays or like sections B01D33/327) since 1990 IPC+CPC Available in IPC and CPC
- B01D 33/21 with hollow filtering discs transversely mounted on a hollow rotary shaft since 1990 +1 CPC IPC+CPC Available in IPC and CPC
- B01D 33/25 with hollow frames axially mounted on a hollow rotary shaft since 1990 IPC+CPC Available in IPC and CPC