USPC 244/35

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U.S. patent classification subclass 244/35 is for patents related to "sustaining airfoils".

A sustaining airfoil is generally called a wing, plane, or blade. It has a surface designed to be acted upon by a stream of air passing around it to support the aircraft. The leading edge of the airfoil is upstream, and the trailing edge is downstream. A theoretical chord line connects the leading and trailing edges. "an upper surface when viewed planwise from above the chord line, and a lower surface when viewed planwise from below the chord line."[1]

USPC 244/35 "contains airfoils in which the novelty is in the shape of the individual airfoil, either in cross-section or in plan view."

Related categories:

  • USPC 244/35.00 means the same thing as 244/35, and for simplicity on this site we will just change them to say 244/35.
  • Historically, a subcategory 35A was created possibly by just one examiner for "compressible flow" (airflow) technologies, and at that time the others in 244/35 were put into a Residual 244/35 category, USPC 244/35R. The distinctions were not maintained and we will map 35A and 35R together into 35 here. Patents listed in categories 244/35R and 244/35A should be treated as being in 244/35 on this page, although we'll keep the suffixes on the original patent pages. For more on this, see the discussion page.
  • USPC 244/45 "is devoted to the arrangement of airfoils, with respect to each other or to the body upon which they are mounted, but which contains many incidental disclosures of airfoils of unusual shape."[1]
  • Subclasses USPC 244/123.1 through USPC 244/124 are for the construction of airfoils such as internal bracing, etc."[1]

  • USPC 244/34 Aircraft sustentation: Subject matter comprising means to provide support, relative to the air, for an aircraft to which it is attached.
    • USPC 244/35 Sustaining airfoils: Support providing means comprising an element, of the type commonly called a wing, plane, or blade, having a surface designed to be acted upon by a relatively moving stream of air to support the aircraft, a leading edge upstream and a trailing edge downstream, a theoretical chord line connecting the two edges, an upper surface when viewed planwise from above the chord line, and a lower surface when viewed planwise from below the chord line.
      • USPC 244/36 Lifting fuselages: Airplane fuselages having a shape which permits them to act as sustaining airfoils.
      • USPC 244/37 Lifting struts: Bracing struts on aircraft constructed and arranged to act as sustaining airfoils.
      • USPC 244/38 Resiliently mounted: Sustaining airfoils attached to aircraft by such devices as springs, elastic cables, etc.
      • USPC 244/39 Rotatable: Sustaining airfoils rotatable or capable of being moved in a rotary path with respect to the aircraft.
      • USPC 244/45 Arrangement: Subject matter having the relative arrangements between a plurality of sustaining airfoils or between one or more airfoils and the body or fuselage.
        • USPC 244/46 Variable: Arrangements of sustaining airfoils having provision for altering the arrangement at will or in response to changing conditions.
          • USPC 244/47 Dihedral: Sustaining airfoils so arranged that the dihedral angle of the wing surfaces on opposite sides of the aircraft may be altered at will or in response to changing conditions.
          • USPC 244/48 Incidence: Sustaining airfoils so arranged that the angle between their chord line and the line of thrust of the aircraft may be altered at will, or in response to changing conditions.
          • USPC 244/49 Folding: Sustaining airfoils arranged so that they may be folded to require less space in storage of the aircraft, or for similar purposes.

References

See also

Patents in categories USPC 244/35, USPC 244/35R, or USPC 244/35A
Enclosing categories USPC 244/34
Subcategories USPC 244/36, USPC 244/37, USPC 244/38, USPC 244/39, USPC 244/45, USPC 244/198
Keywords Airfoil, Control, Lift
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