CPC Subclass Not Allocatable
B04C APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES ( jet mills B02C19/06; cyclonic type combustion apparatus F23; )
Description
B04C covers apparatus that exploit natural vortex formation (free vortex flow) to separate or process materials, with cyclones as the primary example. These devices rely on centrifugal forces generated by rotational fluid motion rather than mechanical rotation, making them suitable for gas-solid, liquid-solid, and liquid-liquid separations in industrial applications. Typical technologies include hydrocyclones, dust cyclones, and classifier cyclones used in mining, chemical processing, and environmental control. This subclass excludes mechanically-driven centrifugal equipment covered by B04B.
6 direct subcodes
Child Classifications
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- B04C 1/00 Apparatus in which the main direction of flow follows a flat spiral
- B04C 11/00 Accessories, e.g. safety or control devices, not otherwise provided for (with electrostatic precipitating arrangements B03C3/14)
- B04C 3/00 Apparatus in which the axial direction of the vortex remains unchanged
- B04C 5/00 Apparatus in which the axial direction of the vortex is reversed
- B04C 7/00 Apparatus not provided for in group B04C1/00, B04C3/00, or B04C5/00; Multiple arrangements not provided for in one of the groups B04C1/00, B04C3/00, or B04C5/00; Combinations of apparatus covered by two or more of the groups B04C1/00, B04C3/00, or B04C5/00
- B04C 9/00 Combinations with other devices, e.g. fans, (with filters B01D50/00)
Top Applicants
Top 10 applicants by patent filingsfor class B04, 2013–2023, worldwide · Source: EPO PATSTAT
- ALFA LAVAL SE 576
- GEA MECHANICAL EQUIPMENT DE 304
- DYSON GB 221
- LG ELECTRONICS KR 151
- GEA WESTFALIA SEPARATOR GROUP DE 138
- FLOTTWEG SE DE 129
- FENWAL US 114
- BECTON, DICKINSON & COMPANY US 112
- ANDREAS HETTICH & COMPANY DE 109
- OMACHRON INTELLECTUAL PROPERTY CA 108