FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS

Description

This subclass encompasses methods and apparatus for controlling, directing, and modifying the flow characteristics of gases and liquids in practical applications. It covers devices such as diffusers, nozzles, flow control valves, and systems that use fluid dynamics principles to achieve desired flow patterns, pressure distributions, or velocity profiles. The classification includes both active and passive flow control techniques, including swirl generators, flow straighteners, and jet deflection mechanisms. F15D excludes general fluid mechanics theory and focuses on engineered means for practical flow manipulation in hydraulic, pneumatic, and general fluid systems.

Filing statistics

IPC subclass F15D recorded 5,001 patent applications worldwide between 2013 and 2023. Annual filings declined from 440 in 2013 to 361 in 2023 (-18%), peaking at 506 applications in 2020. The most active applicants in class F15 are ROBERT BOSCH (1,079 applications), SCHAEFFLER TECHNOLOGIES & COMPANY (980 applications) and SMC CORPORATION (737 applications).

Source: EPO PATSTAT, worldwide filings

Additional Content

Methods and means for influencing the flow of liquids, applicable to ships or other waterborne vessels , , , Influencing air flow over aircraft surfaces by affecting boundary layer flow Influencing air flow over aircraft surfaces, not otherwise provided for Fluid-circuit elements