| Patents for B64D 35 - Transmitting power from power plant to propellers or rotors; Arrangements of transmissions (681) |
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| 01/12/1994 | CN1080609A Electric power helicopter |
| 12/21/1993 | CA1325346C Multiple engine drive for single output shaft and combining gearbox therefor |
| 09/23/1993 | DE4237182A1 Ducted fan airscrew for aircraft - has air screw directly flanged onto single drive motor with duct in tailplane |
| 08/17/1993 | CA1321380C Aircraft propulsion |
| 07/22/1993 | WO1993013983A1 Engine arrangement |
| 06/23/1993 | CN1073505A Drive system of bionic machine |
| 02/17/1993 | CN1068998A Transmission differential mechanism for coaxial rotor flying vehicle |
| 02/16/1993 | US5186609 Contrarotating propeller type propulsion system |
| 01/12/1993 | US5178028 Offset face gear transmission |
| 08/11/1992 | US5137425 Propfan engine having two oppositely rotating fan rotors |
| 05/14/1992 | DE4130670A1 Propeller with reduction gear in hub - uses pinion on end of engine shaft engaging internal toothed ger |
| 04/16/1992 | WO1992006317A1 Offset face gear transmission |
| 10/08/1991 | US5054716 Drive system for tiltrotor aircraft |
| 05/02/1991 | WO1991005704A1 Drive system for tiltrotor aircraft |
| 03/26/1991 | US5001901 Hydraulic fluid circuit for full case hydraulic unit |
| 03/12/1991 | US4998995 Aircraft of split turbo-prop configuration |
| 01/08/1991 | US4982914 Aircraft with a plurality of propellers, a pipe structure for thereon holdable wings, for vertical take off and landing |
| 11/20/1990 | US4970860 Fluid coupling for helicopter propeller |
| 10/23/1990 | US4964844 Gearbox arrangement for driving coaxial contra rotating multi-bladed rotors |
| 09/11/1990 | US4955561 Cogwheel drive mechanism for aircraft |
| 06/26/1990 | US4936247 Visual and tactile indication of coupling status of an integrated drive generator |
| 05/15/1990 | US4925131 Aircraft with a plurality of propellers, a pipe structure for thereon holdable wings, for vertical take off and landing |
| 03/07/1990 | EP0356541A1 Vertically taking off and landing aircraft, which flies horizontally on wings which include a pipe structure and which can be pivoted from substantially vertical to horizontal position |
| 02/13/1990 | US4899959 Gas turbine power plant arrangement |
| 02/13/1990 | US4899957 Air borne craft, for example helicopter, and related devices |
| 12/19/1989 | US4887424 Propfan turbine engine |
| 11/08/1989 | EP0341024A2 Aircraft of split turbo-prop configuration |
| 10/10/1989 | US4872624 Drive arrangement for a vehicle having a propeller |
| 10/03/1989 | US4871130 Propulsion apparatus for an aircraft |
| 09/12/1989 | CA1259204A1 Main gearbox for twin-engined helicopter |
| 08/22/1989 | US4858493 Multi-range, dissipative, infinitely variable ratio transmission |
| 08/15/1989 | US4856732 Airborne vehicle with hydraulic drive and control |
| 06/28/1989 | EP0321671A2 Clutch |
| 05/16/1989 | US4829850 Multiple engine drive for single output shaft and combining gearbox therefor |
| 03/14/1989 | US4811627 Main transmission gearbox for a twin-engined helicopter |
| 11/30/1988 | EP0292655A2 Propulsion unit for a propeller aircraft |
| 11/03/1988 | DE3713249A1 Propulsion device for an aircraft |
| 09/21/1988 | EP0282784A2 Gas turbine installation for helicopters |
| 09/13/1988 | US4770371 Fluid motor driven multi propeller aircraft |
| 09/07/1988 | WO1988006689A1 Multiple engine drive for single output shaft and combining gearbox therefor |
| 06/29/1988 | EP0272822A1 Aircraft propulsion |
| 06/16/1988 | WO1988004258A1 Aircraft propulsion |
| 03/01/1988 | US4728261 Propeller module for an aero gas turbine engine |
| 01/05/1988 | CA1231132A1 Propeller actuation system |
| 11/03/1987 | US4703906 Airborne craft with an inclinable upper structure |
| 08/25/1987 | US4688995 Propeller module for an aero gas turbine engine |
| 08/25/1987 | US4688743 Aircraft with a retractable variable pitch propeller or a fluid motor driven multi propeller aircraft |
| 05/05/1987 | US4662584 Arrangements of or to propellers to improve the capabilities of propeller-driven craft |
| 04/21/1987 | US4659287 Helicopter engine-drive assembly |
| 01/15/1987 | DE3525099A1 Power transmission system for rotary-wing aircraft or propeller-driven aircraft |
| 01/13/1987 | CA1216477A1 Rotor device |
| 08/12/1986 | US4605185 Airplane powered by vehicular motor |
| 08/05/1986 | US4604032 Rotor device |
| 04/22/1986 | US4583416 Lubrication arrangement for a speed-reduction gear for an aircraft engine |
| 02/19/1986 | EP0172104A1 Main transmission gear box for a two-engine helicopter |
| 01/07/1986 | US4563129 Integrated reduction gear and counterrotation propeller |
| 12/10/1985 | US4557438 Hydraulically controlled, fluid-stream driven vehicle |
| 12/03/1985 | US4556366 Propeller actuation system |
| 03/12/1985 | US4504029 Fluid motor driven multi propeller aircraft |
| 01/29/1985 | US4496120 Arrangements of or to propellers to improve the capabilities of propeller-driven craft |
| 12/18/1984 | US4488692 Vehicle with propeller-pairs and automatic synchronization with power division |
| 10/30/1984 | US4479619 Helicopter transmission systems |
| 10/23/1984 | CA1176478A1 Propeller brake for a turbo-prop engine |
| 04/10/1984 | US4441384 Freewheel devices |
| 01/17/1984 | US4426049 Dual propeller and engine drive system for aircraft |
| 10/19/1983 | EP0091744A1 Helicopter transmission systems |
| 09/20/1983 | US4405103 Hydraulically operated air borne rotor craft |
| 03/15/1983 | US4376614 Propeller brake for a turbo-prop engine |
| 03/23/1982 | US4320633 Freewheel coupling |
| 02/04/1981 | EP0023393A1 Freewheel devices |
| 11/06/1979 | US4173321 Vehicle for traveling in the air and on the ground equipped with hydraulically driven propellers |
| 10/23/1979 | US4171784 Combination road and air vehicle having a lowerable chassis |
| 02/13/1979 | US4138901 Speed reducer, particularly for driving a propeller |
| 01/30/1979 | US4136845 Hydraulically operated aircraft with a retractable propeller |
| 10/31/1978 | US4122730 Housing for a mechanical gear arrangement |
| 06/06/1978 | US4093155 Steam powered tilting engine VTOL airplane |
| 05/02/1978 | US4086768 Driving and controlling unit |
| 01/17/1978 | US4068470 Gas turbine engine with convertible accessories |
| 03/01/1977 | US4009849 Fluid-stream driven aircraft |
| 10/05/1976 | US3983833 Hydraulically controlled fluidstream driven waterborn vehicle |
| 05/18/1976 | US3957229 Convertible auxiliary turbine for aircraft |