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  1. Technology classes
  2. /F · Mechanical engineering
  3. /F03 · Machines or engines for liquids
  4. /F03D · Wind motors
  5. /F03D 1/00 · Wind motors with rotation axis substantially parallel to the air flow entering
  6. /F03D 1/06 · Rotors
  7. /F03D 1/065 · Characterised by their construction elements
  8. /F03D 1/0658 · Arrangements for fixing wind-engaging parts to a hub
  9. /F03D 1/0662 · Using kinematic linkage
  10. /F03D 1/0664 · Pitch arrangements
  11. /F03D 1/0667 · Characterized by the actuator arrangements
  12. /F03D 1/0669
F03D 1/0669

Hydraulic actuators

Official title: {Hydraulic actuators}

F03D1/0669 (Hydraulic actuators) appears on 4 US grants and 8 published applications in this corpus.

Search patents in F03D

Where it sits

  1. FMechanical engineering
  2. F03Machines or engines for liquids
  3. F03DWind motors
  4. F03D 1/00Wind motors with rotation axis substantially parallel to the air flow entering
  5. F03D 1/06Rotors
  6. F03D 1/065Characterised by their construction elements
  7. F03D 1/0658Arrangements for fixing wind-engaging parts to a hub
  8. F03D 1/0662Using kinematic linkage
  9. F03D 1/0664Pitch arrangements
  10. F03D 1/0667Characterized by the actuator arrangements
  11. F03D 1/0669Hydraulic actuators
Granted patents
4
Published applications
8
Assignees
4
Inventors
24
Latest grant
24 Mar 2026

Filings by year

Granted patentsPublished applications
F03D 1/0669: granted patents and published applications per publication year
YearGranted patentsPublished applications
202402
202515
202631

202420252026

By publication year. 2026 runs to 8 Oct.

Recent patents

  • Wind turbine24 Mar 2026US 12,584,457 B2Vestas Wind Systems A/S
  • Hydraulic device for a pitch system, a pitch system and wind turbine17 Mar 2026US 12,577,934 B2HAWE Hydraulik SE
  • Hydraulic system for pitch angle adjustment of a rotor blade of a wind turbine and wind turbine with such a hydraulic system17 Feb 2026US 12,553,412 B2HAWE Hydraulik SE
  • Hub hydraulic assembly for a wind turbine rotor2 Dec 2025US 12,486,825 B2Siemens Gamesa Renewable Energy A/S
  • Controlling the pitch angle of a rotor blade of a wind turbine16 Jul 2026US 2026/0201864 A1Vestas Wind Systems A/S
  • Wind turbine9 Oct 2025US 2025/0314232 A1Vestas Wind Systems A/S
  • Hydraulic device for a pitch system, a pitch system and wind turbine3 Jul 2025US 2025/0215852 A1HAWE Hydraulik SE
  • Hub hydraulic assembly for a wind turbine rotor1 May 2025US 2025/0137435 A1Siemens Gamesa Renewable Energy A/S
  • Hydraulic system for pitch angle adjustment of a rotor blade of a wind turbine and wind turbine with such a hydraulic system17 Apr 2025US 2025/0122862 A1HAWE Hydraulik SE

Most cited

By later US patents

No patent in this class has been cited by a later US patent yet.

Top assignees

Documents
  • HHHAWE Hydraulik SE5
  • SGSiemens Gamesa Renewable Energy A/S3
  • VWVestas Wind Systems A/S3
  • DDeublin Company1

Often classified with

  • F05BIndexing scheme relating to wind, spring, weight, inertia or like motors, to12
  • Y02EClean energy generation and storage12
  • F15BSystems acting by means of fluids in general4
  • F16CShafts1
  • F16LPipes1

Documents that also carry the other class.

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