Patent US-1911-996366

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Helicopter with umbrella-shaped propellers, rotating in opposite directions, which will break of the fall of the vessel even if they stop; and exert some gyroscopic effects; air drawn through openings, forced; rotating at adjustable speed

  • Inventor location: Seattle, King county, WA (FIPSloc=53033, (imputed by HistPat)

Sources


Year filed 1910
Year granted 1911
Office US
Patent number 996366
Inventors Walter W. Roberts
Inventor country US
Applicant person Walter W. Roberts
Applicant firm
Applicant type INDIV
Applicant is inventor? 1
Original title Aerial-navigation machine
English title Aerial-navigation machine
Tech fields helicopter, propeller, frame, rudder, stability
Filing date 1910-09-16
Full specification filed date
Application number 1910582366
Grant date 1911-06-27
Granted? 1
Publication date
Supplementary to patent
Related to aircraft? 1
Serial number 582366
Patent agent Wheatley
Assigned to
National tech categories USPC 244/6, USPC 244/122R, USPC 244/139, USPC 244/104CS
IPCs
CPCs CPC B64C23/005
Family year 1910
First filing? 1
Cites these patents
Citations from after 1930
Application ID 47465609
INPADOC family ID 43940489
Number of text pages 4
Number of diagram pages 3
Number of figures 6
Number of claims 7