DIFF Subgroup
F16K 21/20 by means making use of air-suction through an opening closed by the rising liquid
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Fluid-delivery valves > Self-closing valves, i.e. closing automatically after operation > closed when a rising liquid reaches a predetermined level > by means making use of air-suction through an opening closed by the rising liquid
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 > closed when a rising liquid reaches a predetermined level (float-actuated valves F16K31/18) > by means making use of air-suction through an opening closed by the rising liquid
No child classifications to compare. This is a leaf node in both IPC and CPC.