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CPC Subgroup
F04B 1/0404

Details or component parts

Full Title

Multi-cylinder machines or pumps characterised by number or arrangement of cylinders (machines or pumps with pistons coacting within one cylinder F04B3/00) > having cylinders in star- or fan-arrangement > Details or component parts

9 direct subcodes

Child Classifications

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  • F04B 1/0408 Pistons
  • F04B 1/0421 Cylinders
  • F04B 1/0435 Arrangements for disconnecting the pistons from the actuated cam
  • F04B 1/0439 Supporting or guiding means for the pistons
  • F04B 1/0443 Draining of the housing; Arrangements for handling leaked fluids
  • F04B 1/0448 Sealing means, e.g. for shafts or housings (for pistons F04B1/0408 )

Top Applicants

Top 10 applicants by patent filingsfor class F04, 2013–2023, worldwide · Source: EPO PATSTAT

  1. LG ELECTRONICS KR 3,855
  2. ROBERT BOSCH DE 3,549
  3. GREE ELECTRIC APPLIANCES 2,273
  4. GE (GENERAL ELECTRIC COMPANY) US 2,126
  5. MITSUBISHI ELECTRIC CORPORATION JP 1,881
  6. UNITED TECHNOLOGIES CORPORATION (UTC) US 1,866
  7. SAFRAN AIRCRAFT ENGINES FR 1,499
  8. MITSUBISHI HEAVY INDUSTRIES JP 1,258
  9. TOYOTA INDUSTRIES CORPORATION JP 1,247
  10. ATLAS COPCO AIRPOWER BE 1,168