USPC 60/269

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U.S. patent classification subclass 60/269 is for patents related to . . . reaction motors which include mechanical air compressor or air flow inducing means. Devices and arrangements with aircraft that use the thrust developed by elements moving back and forth over substantially the same path for propelling aircraft. These elements usually are designed to have reduced resistance to motion in one direction.[1][2]

References

  1. Description of category USPC 60/269 at uspto.gov
  2. Class 060: Aeronautics, Manual of U.S. Patent Classification, as of June 30, 2000

Patents in category USPC 60/269

Enclosing categories USPC 60/200.1
Subcategories
Keywords Propellers, Aerial propellers
Start year
End year


 269	:
	This subclass is indented under subclass 200.1.  Apparatus wherein the pressure of air is increased by mechanical means or by means of a pressurized fluid, said air being used as a propellant or as the motive fluid.

(1) Note. Included in this definition are reaction motors which include an impeller for moving a fluid and having an outlet for discharging said fluid having a sole disclosed function to produce a thrust. SEE OR SEARCH THIS CLASS, SUBCLASS:

221+, for reaction motors having shrouded impellers wherein water is the medium moved. 268, for motors having counter rotating turbine rotors driving plural compressor elements. SEE OR SEARCH CLASS:

239, Fluid Sprinkling, Spraying, and Diffusing, subclass 265.11 for a device having an impeller for moving a fluid and an outlet through which the fluid may be discharged wherein a function of the discharged fluid relates to spraying, sprinkling, etc.