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CPC Subgroup
F01C 1/063

with coaxially-mounted members having continuously-changing circumferential spacing between them

Full Title

Rotary-piston machines or engines (with axes of co-operating members non parallel F01C3/00; with the working-chamber walls at least partly resiliently deformable F01C5/00; with fluid ring or the like F01C7/00; rotary-piston machines or engines in which the working fluid is exclusively displaced by, or exclusively displaces, one or more reciprocating pistons F01B13/00) > of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents > with coaxially-mounted members having continuously-changing circumferential spacing between them

Filing statistics

CPC F01C 1/063 belongs to the parent subclass F01C, which recorded 11,139 patent applications worldwide between 2013 and 2023. Annual filings declined from 1,330 in 2013 to 549 in 2023 (-59%), peaking at 1,372 applications in 2016. The most active applicants in class F01 are GE (GENERAL ELECTRIC COMPANY) (9,989 applications), UNITED TECHNOLOGIES CORPORATION (UTC) (8,110 applications) and SAFRAN AIRCRAFT ENGINES (6,248 applications).

Source: EPO PATSTAT, worldwide filings

4 direct subcodes

Child Classifications

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  • F01C 1/067 having cam-and-follower type drive
  • F01C 1/07 having crankshaft-and-connecting-rod type drive
  • F01C 1/073 having pawl-and-ratchet type drive
  • F01C 1/077 having toothed-gearing type drive

Top Applicants

Top 10 applicants by patent filingsfor class F01, 2013–2023, worldwide · Source: EPO PATSTAT

  1. GE (GENERAL ELECTRIC COMPANY) US 9,989
  2. UNITED TECHNOLOGIES CORPORATION (UTC) US 8,110
  3. SAFRAN AIRCRAFT ENGINES FR 6,248
  4. HYUNDAI MOTOR COMPANY KR 4,530
  5. SIEMENS DE 4,461
  6. FORD GLOBAL TECHNOLOGIES US 4,029
  7. RAYTHEON TECHNOLOGIES CORPORATION US 3,947
  8. TOYOTA MOTOR CORPORATION JP 3,734
  9. GE (GENERAL ELECTRIC COMPANY) 3,415
  10. SCHAEFFLER TECHNOLOGIES & COMPANY DE 3,063