USPC 244/30

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US Patent Classification 244/30 was for Propelled aeronautical machines sustained by their buoyancy relative to the air.[1]

USPC patent class tree

  • USPC 244/24: Lighter-than-air aircraft
    • USPC 244/25: Airships with sustaining wings: Propelled aeronautical machines sustained by their buoyancy relative to the air, having also provision for sustentation by aerodynamic action on airfoils in fixed relation to the machines. In this subclass the machines are primarily lighter-than-air craft with the fixed sustaining airfoils providing additional sustentation.
    • USPC 244/26: Airship and helicopter sustained. Propelled aeronautical machines sustained by their buoyancy relative to the air, having also provision for sustentation or vertical lift by means of screw propellers arranged to develop a substantial component of thrust in a vertical direction.
    • USPC 244/27 Airship and paddle wheel sustained: USPC 244/24 Propelled aeronautical machines sustained by their buoyancy relative to air, and with sustentation or vertical lift by the downward thrust from rotating paddle wheels. The paddle wheels may also provide forward propulsion.
    • USPC 244/28 Airship and beating wing sustained: under USPC 244/24: Propelled aeronautical machines sustained by their buoyancy relative to the air, having also provision for sustentation or vertical lift by the downward thrust developed by flapping or reciprocating blades attached to the machines. These blades may also provide forward propulsion.
    • USPC 244/29: Airship and fluid sustained. Propelled aeronautical machines sustained by their buoyancy relative to the air, having also provision for sustentation by the reaction to downward movement of restricted masses or jets of air or other fluid. The forward propulsion of the machine may also be derived from movement of the same or similar masses or jets of air or other fluid.
    • USPC 244/30: Airships: Propelled aeronautical machines sustained by their buoyancy relative to the air.
    • USPC 244/31: Balloons: Aircraft sustained by their buoyancy relative to the air, having no provision for propulsion
    • USPC 244/32: Balloons with parachutes
    • USPC 244/33: Captive aircraft sustained by their buoyancy relative to the air, restrained from free flight by ropes or cables connecting them to some fixed or movable anchoring means on the ground or water.

References

  1. ↑ https://www.uspto.gov/web/patents/classification/uspc244/defs244.htm

This wiki has 63 patents in category "USPC 244/30". Other techtypes related to USPC 244/30: USPC 244/61

Patents in category USPC 244/30


Enclosing categories USPC 244/24
Subcategories
Keywords LTA, Propulsion, USPC 244/61, USPC 244/94, USPC 244/95, USPC 244/96, USPC 244/125, USPC 244/126, USPC 244/127, USPC 244/128, CPC B64B1/00
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