Safety valves; Equalising valves,

Introduced: September 1968

Title

Titles differ between systems:

IPC: Safety valves; Equalising valves

CPC: Safety valves; Equalising valves,

Full titles differ between systems:

IPC:

Safety valves; Equalising valves

CPC:

Safety valves; Equalising valves,

Of 8 combined children, 6 exist in both systems.

2 codes are CPC-only extensions.

3 shared codes have differing titles between IPC and CPC.

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F16K 17/003 CPC only CPC only
F16K 17/006 CPC only CPC only
F16K 17/02 opening on surplus pressure on one side; closing on insufficient pressure on one side (check valves F16K15/00) +1 CPC IPC+CPC Available in IPC and CPC
F16K 17/18 opening on surplus pressure on either side IPC+CPC Available in IPC and CPC
F16K 17/20 Excess-flow valves (actuated in consequence of shock or similar extraneous influence F16K17/36) +1 CPC IPC+CPC Available in IPC and CPC
F16K 17/36 actuated in consequence of extraneous circumstances, e.g. shock, change of position +2 CPC IPC+CPC Available in IPC and CPC
F16K 17/40 with a fracturing member, e.g. fracturing diaphragm, glass, fusible joint (valves opening on surplus pressure F16K17/14) +2 CPC IPC+CPC Available in IPC and CPC
F16K 17/42 Valves preventing penetration of air in the outlet of containers for liquids IPC+CPC Available in IPC and CPC

Class F16,2013–2023, worldwide · Source: EPO PATSTAT

Class F16,2013–2023, worldwide · Source: EPO PATSTAT