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IPC Main Group
F23M 9/00

Baffles or deflectors for air or combustion products; Flame shields

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:
COMBUSTION APPARATUS; COMBUSTION PROCESSES
Subclass:
CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR

Additional Content

Limiting references

Baffles or deflectors for air or combustion products structurally associated with burners , e.g. , ,

Application references

Steam boilers Fluid heaters, e.g. heating boilers Furnaces, kilns, ovens or retorts

5 direct subcodes

Child Classifications

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  • F23M 9/02 in air inlets
  • F23M 9/04 with air supply passages in the baffle or shield
  • F23M 9/06 in fire-boxes
  • F23M 9/08 Helical or twisted baffles or deflectors
  • F23M 9/1 Baffles or deflectors formed as tubes, e.g. in water-tube boilers

Top Applicants

Top 10 applicants by patent filingsfor class F23, 2013–2023, worldwide · Source: EPO PATSTAT

  1. GE (GENERAL ELECTRIC COMPANY) US 2,124
  2. XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 1,369
  3. NINGBO FOTILE KITCHENWARE COMPANY 1,363
  4. SIEMENS DE 997
  5. UNITED TECHNOLOGIES CORPORATION (UTC) US 937
  6. GE (GENERAL ELECTRIC COMPANY) 898
  7. VATTI 815
  8. CHINESE ACADEMY OF SCIENCES 719
  9. RINNAI COMPANY 708
  10. MITSUBISHI HITACHI POWER SYSTEMS 670