CPC B64C25/00

This technology category is for "Alighting gear on aircraft". Generally this means landing gear although by some literal interpretations it could mean gear that aids descending in the air.

Classification tree descending from CPC B64C25/00:

• CPC B64C25/00 Alighting gear (air-cushion alighting gear CPC B60V3/08)
  • CPC B64C25/001 Devices not provided for in the groups CPC B64C25/02 - CPC B64C25/68
    • CPC B64C2025/003 Means for reducing landing gear noise, or turbulent flow around it, e.g. landing gear doors used as deflectors
    • CPC B64C2025/005 Tail skids for fuselage tail strike protection on tricycle landing gear aircraft
    • CPC B64C2025/006 Landing gear legs comprising torque arms
    • CPC B64C2025/008 Comprising means for modifying their length, e.g. for kneeling, for jumping, or for leveling the aircraft
  • CPC B64C25/02 Undercarriages
    • CPC B64C25/04 Arrangement or disposition on aircraft
    • CPC B64C25/06 fixed
    • CPC B64C25/08 non-fixed, e.g. jettisonable
      • CPC B64C25/10 retractable, foldable, or the like
        • CPC B64C25/12 sideways
          • CPC B64C2025/125 into the fuselage, e.g. main landing gear pivotally retracting into or extending out of the fuselage
        • CPC B64C25/14 fore-and-aft
        • CPC B64C25/16 Fairings movable in conjunction with undercarriage elements
        • CPC B64C25/18 Operating mechanisms
          • CPC B64C25/20 mechanical
          • CPC B64C25/22 fluid
          • CPC B64C25/24 electric
          • CPC B64C25/26 Control or locking systems therefor
            • CPC B64C25/28 with indicating or warning devices
            • CPC B64C25/30 emergency actuated
  • CPC B64C25/32 characterised by the ground or like engaging elements (arrester hooks CPC B64C25/68)
    • CPC B64C2025/325 specially adapted for helicopters
    • CPC B64C25/34 wheeled type, e.g. multi-wheeled bogies
      • CPC B64C2025/345 Multi-wheel bogies having one or more steering axes
      • CPC B64C25/36 Arrangements or adaptations of wheels, tyres, or axles in general (construction of wheels or axles CPC B60B; construction of tyres in general CPC B60C)
    • CPC B64C25/38 endless-track type
    • CPC B64C25/40 the elements being rotated before touch-down
      • CPC B64C25/405 Powered wheels, e.g. for taxing
    • CPC B64C25/42 Arrangements or adaptations of brakes (the ground braking force being regulated, at least in part, by a speed condition, e.g. acceleration or deceleration of the ground engaging alighting gear, CPC B60T8/32)
      • CPC B64C25/423 Braking devices acting by reaction of gaseous medium (CPC B64C25/426 takes precedence; using rockets CPC B64D27/023)
      • CPC B64C25/426 Braking devices providing an automatic sequence of braking
      • CPC B64C25/44 Actuating mechanisms
        • CPC B64C25/445 Brake regulators for preventing somersaulting
        • CPC B64C25/46 Brake regulators for preventing skidding or aircraft somersaulting (anti-skidding regulators; electric or electronic controllers therefor CPC B60T8/1703)
        • CPC B64C25/48 differentially operated for steering purposes
    • CPC B64C25/50 Steerable undercarriages; Shimmy damping (steering devices applicable to land vehicles CPC B62D)
      • CPC B64C25/505 Shimmy damping
    • CPC B64C25/52 Skis or runners
    • CPC B64C25/54 Floats
      • CPC B64C25/56 inflatable (connection of valves to inflatable elastic bodies CPC B60C29/00)
    • CPC B64C25/58 Arrangements or adaptations of shock-absorbers or springs (shimmy dampers CPC B64C25/50; vehicle suspension arrangements in general CPC B60G; shock absorber per se CPC F16F)
      • CPC B64C25/60 Oleo legs
      • CPC B64C25/62 Spring shock-absorbers; Springs
        • CPC B64C25/64 using rubber or like elements
    • CPC B64C25/66 Convertible alighting gear; Combinations of different kinds of ground or like engaging elements
  • CPC B64C25/68 Arrester hooks (arresting gear, e.g. on aircraft carriers CPC B64F)

Patents in category CPC B64C25/00

• Patent GB-1910-29231 (Inventors: Robert Blackburn, Filing date: 1910-12-16)
• Patent GB-1909-18384 (English title: Improvements in Alighting Mechanism for Flying Machines, Inventors: Frederick William Lanchester, Filing date: 1909-08-10)
• Patent GB-1909-30533 (English title: Improvements in or in connection with Landing Devices for Aerial Machines, Inventors: Robert Blackburn, Filing date: 1909-12-31)
• Patent GB-1910-19427 (English title: Aeroplanes and aerial machines, Inventors: Haydn Arnold Sanders • Hampden Sanders, Filing date: 1910-02-18)
• Patent GB-1911-3270 (Inventors: Frederick William Croucher, Filing date: 1911-02-08)
• Patent FR-1911-420322.16406 (English title: Aeroplane, actually airplane landing system featuring wheels and shock-absorbers, Inventors: Édouard Vedovelli, Supplementary to patent: Patent FR-1909-420322, Filing date: 1911-11-10)
• Patent GB-1912-6461 (English title: Improvements in and relating to Running and Alighting Gear for Flying Machines, and Running Gear for other Vehicles, Inventors: Norman Arthur Thompson, Filing date: 1912-03-15)
• Patent FR-1912-449807 (English title: System preventing the drift behind an airplane and facilitating maneuvering on land, Filing date: 1912-10-24, Applicant firm: Société R. Bourbeau et H. Devaux)
• Patent FR-1913-456164 (Inventors: Eugene-Marie-Louis Lelievre, Filing date: 1913-03-29)
• Patent DE-1915-328804 (English title: Suspended undercarriage for airplanes, Filing date: 1915-09-25, Applicant firm: Otwi-Werke m.b.H.)
• Patent FR-1928-653688 (English title: Advanced chassis or undercarriage for flying machines, Inventors: Bert Hinkler, Supplementary to patent: Patent GB-1927-653688, Filing date: 1928-05-02)

References

Enclosing categories	CPC B64C
Subcategories	CPC B64C25/001, CPC B64C25/02, CPC B64C25/32, CPC B64C25/68
Keywords	Landing, USPC 244/100
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