by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof > Cooling of valves > by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve

CPC:

Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof > Cooling of valves > by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve

No child classifications to compare. This is a leaf node in both IPC and CPC.