Helicopter

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Description

FIG. 1 is a right side elevational view of a helicopter showing my new design with the forward rotor blade broken away in the center for convenience of illustration it being understood that said forward rotor blade is of the same length as the rear upper rotor blade;

FIG. 2 is a top plan view thereof;

FIG. 3 is an enlarged front elevational view thereof with the two upper rotor blades broken away in the center for convenience of illustration; and

FIG. 4 is an enlarged rear elevational view thereof with the upper rotor blades omitted and the support structure for said blades broken away for convenience of illustration.

The side opposite to that shown in the drawing is a mirror image thereof except for the tail vane and tail rotor.

Referenced Cited
U.S. Patent Documents
D196016 August 1963 Ballauer et al.
D209353 November 1967 Schramm
3478353 November 1969 Adams, Jr.
3921939 November 1975 Garfinkle
Patent History
Patent number: D271390
Type: Grant
Filed: Apr 28, 1980
Date of Patent: Nov 15, 1983
Inventor: Buford J. Schramm (Tempe, AZ)
Primary Examiner: James M. Gandy
Attorney: Donald D. Mon
Application Number: 6/146,621
Classifications
Current U.S. Class: Rotary Wing, I.e., Lift During Horizontal Flight Maintained By Moving Airfoil (D12/327)
International Classification: D1207;