DIFF Subgroup
F16K 21/04 Self-closing valves, i.e. closing automatically after operation
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Fluid-delivery valves > Self-closing valves, i.e. closing automatically after operation
CPC:
Fluid-delivery valves, (for liquid handling B67D; for flushing devices for water-closets or the like E03D) > Self-closing valves, i.e. closing automatically after operation
IPC and CPC are identically structured here. All 4 subcodes exist in both systems.
2 shared codes have differing titles between IPC and CPC.
Child Classifications
Navigate with arrow keys, Enter to open
- F16K 21/06 in which the closing movement, either retarded or not, starts immediately after opening IPC+CPC Available in IPC and CPC
- F16K 21/16 closing after a predetermined quantity of fluid has been delivered (F16K21/10 takes precedence) +1 CPC IPC+CPC Available in IPC and CPC
- F16K 21/18 closed when a rising liquid reaches a predetermined level (float-actuated valves F16K31/18) +1 CPC IPC+CPC Available in IPC and CPC