Quad tiltrotor

Description

FIG. 1 is a top view of a quad tiltrotor of our new design having rotors in the takeoff/landing/hovering position;

FIG. 2 is a bottom view thereof;

FIG. 3 is a port side elevation view thereof;

FIG. 4 is a starboard side elevation view thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is a rear elevation view thereof;

FIG. 7 is a top view of a quad tiltrotor of our new design having rotors in a flight position;

FIG. 8 is a bottom view thereof;

FIG. 9 is a port side elevation view thereof;

FIG. 10 is a starboard side elevation view thereof;

FIG. 11 is a front elevation view thereof;

FIG. 12 is a rear elevation view thereof; and,

FIG. 13 is a perspective view thereof.

Claims

The ornamental design for the quad tiltrotor, as shown and described.

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Inventors:	DeTore; John A. (Arlington, TX), Spivey; Richard F. (Fort Worth, TX), Foster; Malcolm P. (Fort Worth, TX), Wood; Tom L. (Arlinton, TX)
Assignee:	Bell Helicopter TEXTRON Inc. (Hurst, TX)
Appl. No.:	D/133,527
Filed:	December 1, 2000

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Current U.S. Class:	D12/328
Current International Class:	1207
Field of Search:	;D12/319-345 ;244/7C,48,51,69,78

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References Cited [Referenced By]

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U.S. Patent Documents

D392937	March 1998	Brichard et al.
D394422	May 1998	Magee
D401898	December 1998	Lauder et al.

Other References

JA. DeTore--Trends for Optimum Flying Crane Design, Oct. 1957. . John A. DeTore--An Investigation of Improved Flying Qualities for Tandem Rotor Helicopters, Institution of the Aerospace Sciences, Jan. 23-25, 1961. . L. Kingson and J. DeTore--Second European Rotorcraft and Powered Lift Aircraft Forum Paper No. 36, Tilt Rotor v/Stol Aircraft Technology, Sep. 20-22, 1976. . J. DeTore and S. Martin, Jr.--Multi Rotor Options for Heavy Lift, Star Technical Paper Series Dec. 3-6, 1979. . Scott R. Gourley--Article V-44--Flying Freight Train, pp. 66-69, Popular Mechanics Magazine, Sep. 2000..

Primary Examiner: Jackson; Marcus A.
Attorney, Agent or Firm: Shiells; Theodore F. Warren, Jr.; Sanford E. Gardere Wynne Sewell LLP