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| Number | Title | Issue Date |
| 7331761 | Wind turbine pitch bearing and method A pitch bearing and related method for wind electric turbines has an annularly-shaped first bearing ring connected with an associated wind turbine blade, and includes a first raceway groove. An annularly-shaped second bearing ring is connected with the rotor portion... | 02/19/2008 |
| 7244097 | Device for adjusting the angle of incidence of a rotor blade of a wind power installation A device for the targeted adjustment of the angle of incidence of a rotor blade (13) which is rotatably mounted, at the foot (14) thereof, on a hub (12) of a rotor (11) of a wind power installation (10). The device includes a geari... | 07/17/2007 |
| 7152705 | Dual engine electric drive system An electric drive system includes a first engine and a second engine. A first electric generator is adapted to be driven by the first engine and to generate a first output. A second electric generator is adapted to be driven by the second engine and to generate a se... | 12/26/2006 |
| 6932561 | Power generation system A wind power system is provided including at least one generator fan having a front face and a rear face. The system also includes a first wind capturing device positioned proximate to the front face. The wind capturing device can be configured to capture wind to cr... | 08/23/2005 |
| 6193189 | Rotary engine and helicopter application In a rotary engine having rotating cylinders which burns a fuel which is not mixed with oil there is a real problem of centrifugal force form the rotating engine causing oil to flow into the combustion chambers. The disclosed rotary engine has oil reservo... | 02/27/2001 |
| 5954479 | Twin engine, coaxial, dual-propeller propulsion system A twin engine, coaxial, dual-propeller propulsion system employing a unique transmission having two independent drive trains. The first of the two engines exclusively drives a first drive train, which in turn rotates a forward multi-bladed propeller assem... | 09/21/1999 |
| 5441388 | Ship drive with two counterturning propellers A ship's drive with two counterturning propellers, the rear propeller of which is fastened to an inner shaft and the front propeller of which is fastened to the head end of a hollow shaft, which runs concentrically with the inner shaft. The hollow shaft i... | 08/15/1995 |
| 4955561 | Cogwheel drive mechanism for aircraft A cogwheel drive mechanism for driving at least one aircraft propeller or helicopter rotor through two transmissions, with two axially displaced transmission-connection shafts and at least one output shaft in the form of a propeller shaft or rotor shaft. ... | 09/11/1990 |
| 4676459 | Double propeller for propelling aircraft Double propeller for propelling aircraft, with two coaxially and axially offset propellers that can be driven separately by associated drive mechanisms through a central shaft and a hollow shaft. To reduce noise and maintain safe operation even when one p... | 06/30/1987 |
| 4426049 | Dual propeller and engine drive system for aircraft An aircraft drive system having two propellers, each of which is driven independently by a drive belt which is connected to a separate engine. The engines are mounted in cantilever fashion in a spaced relationship on a hollow sleeve. The sleeve is attache... | 01/17/1984 |
| 3938464 | Contra-rotating propeller drive system A contra-rotating propeller system, particularly adapted for high speed water craft, is characterized by a movable support for at least one of two nominally-aligned and independently driven contra-rotating propellers. In a particular embodiment a forward ... | 02/17/1976 |
