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PCE
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DIFF Subgroup
F01D 1/02

with stationary working-fluid guiding means and bladed or like rotor, (F01D1/24 takes precedence; without stationary working-fluid guiding means F01D1/18)

Introduced: September 1968

Title

Titles differ between systems:

IPC: with stationary working-fluid guiding means and bladed or like rotor

CPC: with stationary working-fluid guiding means and bladed or like rotor, (F01D1/24 takes precedence; without stationary working-fluid guiding means F01D1/18)

Full Title

Full titles differ between systems:

IPC:

Non-positive-displacement machines or engines, e.g. steam turbines > with stationary working-fluid guiding means and bladed or like rotor

CPC:

Non-positive-displacement machines or engines, e.g. steam turbines (wit working-fluid flows in opposite axial directions for balancing axial thrust F01D3/02; with other than pure rotation F01D23/00; turbines characterised by their use in special steam systems, cycles, or processes, regulating devices therefor F01K) > with stationary working-fluid guiding means and bladed or like rotor, (F01D1/24 takes precedence; without stationary working-fluid guiding means F01D1/18)

Of 7 combined children, 5 exist in both systems.

2 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • F01D 1/023 CPC only CPC only
  • F01D 1/026 CPC only CPC only
  • F01D 1/04 traversed by the working-fluid substantially axially IPC+CPC Available in IPC and CPC
  • F01D 1/10 having two or more stages subjected to working-fluid flow without essential intermediate pressure change, i.e. with velocity stages (F01D1/12 takes precedence) IPC+CPC Available in IPC and CPC
  • F01D 1/16 characterised by having both reaction stages and impulse stages IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class F01,2013–2023, worldwide · Source: EPO PATSTAT

  1. GE (GENERAL ELECTRIC COMPANY) US 8,496
  2. UNITED TECHNOLOGIES CORPORATION (UTC) US 7,291
  3. SAFRAN AIRCRAFT ENGINES FR 5,503
  4. TOYOTA MOTOR CORPORATION 4,556
  5. SIEMENS DE 3,992
  6. HYUNDAI MOTOR COMPANY KR 3,929
  7. RAYTHEON TECHNOLOGIES CORPORATION US 3,534
  8. FORD GLOBAL TECHNOLOGIES US 3,407
  9. TOYOTA MOTOR CORPORATION JP 3,042
  10. WEICHAI POWER COMPANY 2,888

Top Applicants (CPC)

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