Coaxial helicopter

Details Coaxial helicopter Coaxial helicopter

2005-05-03

2005-05-03

Dinh, Tien (Department: 3644)

Aeronautics and astronautics

Aircraft, heavier-than-air

Helicopter or auto-rotating wing sustained, i.e., gyroplanes

Reexamination Certificate

active

06886777

ABSTRACT:
A coaxial helicopter, comprising a first rotor carried by a first shaft and a second rotor carried by a second shaft; wherein one of the first and second rotors has cyclic pitch control and the other rotor does not have cyclic pitch control, at least pitch and roll control being implemented by cyclic blade pitch control of only one rotor of the coaxial rotor set. Provisions for yaw control can include differential collective control of the first and second rotors, providing yaw paddles and/or a tail rotor, ducted fan, or an air jet configured for yawing the coaxial helicopter.

REFERENCES:
patent: 1378112 (1921-05-01), Hewitt
patent: 1568765 (1926-01-01), Ortego
patent: 1786576 (1930-12-01), Nelson
patent: 1848306 (1932-03-01), Bluhm
patent: 1849235 (1932-03-01), Kibbe
patent: 1887429 (1932-11-01), Price
patent: 2074342 (1937-03-01), Platt
patent: 2388653 (1945-11-01), Hays
patent: 2395610 (1946-02-01), Cavallaro
patent: 2480806 (1949-08-01), Desmoulins
patent: 2486059 (1949-10-01), Penecost
patent: 2487020 (1949-11-01), Gilcrease
patent: 2496857 (1950-02-01), Cronstedt et al.
patent: 2950074 (1960-08-01), Apostolescu
patent: 3096953 (1963-07-01), Koump
patent: 3417825 (1968-12-01), Ramme
patent: 3554467 (1971-01-01), Yowell
patent: 3690597 (1972-09-01), Di Martino
patent: 3765622 (1973-10-01), Haines
patent: 3841351 (1974-10-01), Bielawa
patent: 3933324 (1976-01-01), Ostrowski
patent: 4084345 (1978-04-01), Tanaka
patent: 4531692 (1985-07-01), Mateus
patent: 4660785 (1987-04-01), Munski
patent: 4913376 (1990-04-01), Black
patent: 4928907 (1990-05-01), Zuck
patent: 5039031 (1991-08-01), Valverde
patent: 5058824 (1991-10-01), Cycon
patent: 5065959 (1991-11-01), Bhatia et al.
patent: 5149012 (1992-09-01), Valverde
patent: 5167384 (1992-12-01), Krepak
patent: 5259729 (1993-11-01), Fujihira et al.
patent: 5284454 (1994-02-01), Randolph
patent: 5344100 (1994-09-01), Jaikaran
patent: 5370341 (1994-12-01), Leon
patent: 5381985 (1995-01-01), Wechsler et al.
patent: 5383810 (1995-01-01), Loving
patent: 5556355 (1996-09-01), Ostrowski
patent: 5791592 (1998-08-01), Nolan
patent: 5915649 (1999-06-01), Head
patent: 6182923 (2001-02-01), Weinhart
patent: 6293492 (2001-09-01), Yanagisawa
patent: 750975 (1944-06-01), None
patent: 1556795 (1970-08-01), None
patent: 172026 (1960-07-01), None
Cox Model Helicopter, “Attack Cobra”, date unknown (see attached).

Affiliated with

Also associated with

Rating

Coaxial helicopter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Coaxial helicopter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coaxial helicopter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3431814