CPC Definition - Subclass F15D

Last Updated Version: 2024.01
FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
Definition statement

This place covers:

Means and methods not provided for in other classes, for influencing the flow of fluids relative to constraining surfaces and after leaving these surfaces, e.g. producing or removing turbulence, deflecting jets, guiding flow through bends in conduits, affecting distribution of fluid in a conduit, reducing fluid friction.

References
Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Methods and means for influencing the flow of liquids, applicable to ships or other waterborne vessels

B63B, B63B 1/00, B63B 3/00, B63B 21/66

Influencing air flow over aircraft surfaces by affecting boundary layer flow

B64C 21/00

Influencing air flow over aircraft surfaces not otherwise provided for

B64C 23/00

Fluid-circuit elements

F15C

Informative references

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

Nozzles, spray heads

B05B

Hydraulic engineering

E02B

Influencing flow of fluids
Definition statement

This place covers:

Means and methods not provided for in other classes, for influencing the flow of fluids, i.e. the flow of liquids or gases relative to constraining surfaces and after leaving these surfaces, e.g. producing or removing turbulence, deflecting jets, guiding flow through bends in conduits, affecting distribution of fluid in a conduit, reducing fluid friction.

{Flow of fluid from conduits such as pipes, sleeves, tubes, with equal distribution of fluid flow over the evacuation surface}
Definition statement

This place covers:

Means for equalising the velocity distribution across the cross section of a fluid conduit.

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Fig. from WO2008071683

{Whirl chambers}
Definition statement

This place covers:

E.g. vortex valves

of jets leaving an orifice
References
Informative references

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

Nozzles or outlets with means for mechanically breaking-up or deflecting the jet

B05B 1/26

around bodies of solid material
References
Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

by influencing the boundary layer {(use of materials, e.g. to reduce surface friction C09K 3/00)}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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Fig. from DE3609541

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Fig. from EP2103818

References
Informative references

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

Golf balls having dimples

A63B 37/0004

Influencing air-flow over aircraft surfaces by affecting boundary-layer flow using e.g. riblets

B64C 21/10

Synonyms and Keywords

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

  • "riblet", "rille" (DE), "rippe" (DE) and "rainure" (FR)
  • " boundary layer", "Grenzschicht" (DE)
Diverting flow into alternative channels
References
Informative references

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

Hydraulic engineering

E02B