Cooperative Patent Classification


CPC Definition - Subclass F16T

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Last Updated Version: 2016.11
STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
Definition statement

This place covers:

Steam traps defined by devices or special automatic valves for discharging condensate and non condensable gases from live steam with less possible loss or consumption of live steam. Furthermore not only steam traps are covered but also all kind of apparatus or valves and component parts and accessories thereof for draining-off liquids from enclosures, gas lines, steam lines or containers containing gases or vapours. Said valves are controlled thermally (thermostatically, bi-metallically driven valves), by excess or release of pressure (thermodynamically driven valves), by floats (mechanically driven valves) or controlled without moving parts (Venturi-type or labyrinth-type).

Relationships with other classification places

Valves in general are classified in F16K. Steam engine plants where engine aspects predominate are classified in F01K, domestic central heating systems using steam are classified in F24D, heat exchange or heat transfer in general is classified in F28 and the generation of vapour in cores of nuclear reactors is classified in G21, steam boilers in general in F22B and devices for superheating steam in F22G.

References
Limiting references

This place does not cover:

Valves for removing gases or air from condensate

Degasification of liquids

Treatment of water, waste water or sewage by degassing

Informative references

Attention is drawn to the following places, which may be of interest for search:

Devices, e.g. valves, for venting or aerating enclosures

Special rules of classification

Attention is drawn to the definition of "steam" and "vapour". In cases where a specific entry for vapour is missing, documents related to special vapours are classified in groups where only "steam" is explicitly mentioned.

Synonyms and Keywords

In patent documents, the following words/expressions are often used as synonyms:

  • "deaeration" and "degasification"