Quotables
"Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible."
Simon Newcomb, astronomer ; Said in 1902, less than two years before the first flight at Kitty Hawk
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7374130 | Method and apparatus for vehicle control using variable blade pitch An integrated propulsion and guidance system for an aircraft or other vehicle includes an engine coupled to a propeller via a driveshaft to produce propulsive force. One or more of the propeller blades are pivotably mounted with respect to the hub of the propeller. ... | 05/20/2008 |
| 7234348 | Testing apparatus A testing apparatus is disclosed that is suitable for a game ball, such as a soccer ball, and a variety of other spherical or non-spherical objects. The testing apparatus includes a housing with the configuration of an air foil. A shaft extends through the housing, ... | 06/26/2007 |
| 7207778 | Rotor as well as rotary-wing aircraft with a rotor A rotor, especially for a rotary-wing aircraft, with a rotor mast and one or more adjustable rotor blades includes a rotor blade adjustment device without a swash plate and arranged on a carrier device that automatically rotates synchronously with the rotor blades, ... | 04/24/2007 |
| 7160083 | Method and apparatus for wind turbine rotor load control Vertical and horizontal wind shears, yaw misalignment and/or turbulence act together to produce asymmetric loading across a wind turbine rotor. The resultant load produces bending moments in the blades that are reacted through the hub and subsequently to the low-spe... | 01/09/2007 |
| 6940186 | Wind turbine having sensor elements mounted on rotor blades The invention relates to a wind power plant with a tower, a rotor having at least one rotor blade being substantially radially distant with respect to a rotor axis and being rotatably supported with respect to a substantially horizontal rotation axis in a portion at... | 09/06/2005 |
| 6913443 | Oscillating means for multi-fan assembly An oscillating arrangement for a multi-fan assembly includes a down rod assembly which is provided for connecting to a hanging assembly, on the hanging assembly is provided two sets of fixing arms which extend outwardly, two member fans are respectively mounted to t... | 07/05/2005 |
| 6908286 | Main rotor shaft mounted hydraulic pressure system A rotor system includes a hydraulic pressure system located within a rotor shaft along an axis or rotation. The hydraulic pressure system is within the rotating field such that fluid pressure is generated and supplied from within the rotational field without the nee... | 06/21/2005 |
| 6769872 | Active control of multi-element rotor blade airfoils A multi-element rotor blade includes a main element and an active slat movable relative to the main element. The slat rotates and translates relative to the main element from a base position. The base position provides a compromise between minimum coefficient of dra... | 08/03/2004 |
| 6722859 | Electromagnetic device capable of controlling the revolving speed of a multi-fan assembly A multi-fan assembly with a built in electromagnetic control device composed of a magnetic induction mask fixedly received in a space in a rotatable member, a magnetic flux coil fixedly connected to a central main shaft and snugly surrounded by the magnetic inductio... | 04/20/2004 |
| 6065935 | Cycloidal propeller having blades which may be set into a sailing position The invention provides for a cycloidal propeller, in strictly rudder operation, accessory apparatuses that mesh with a gear drive connected to a shaft of the respective wing. The invention accomplishes relatively small actuation movements of the accessory... | 05/23/2000 |
| 6000910 | Electric fan The present invention relates to an electric fan employing three impellers which are so implemented as to receive the driving force of the motor and, more particularly, to an electric fan equipped with the second crank device and the convex surfaced drivi... | 12/14/1999 |
| 5800126 | Swinging head gear shell of an electric fan A swinging head gear shell for an electric fan is provided and includes a body and a cover respectively molded from reinforced engineering plastics. The body has a mounting plate for mounting with screws, a first open top chamber and a second open top cha... | 09/01/1998 |
| 5135356 | Swashplate anti-drive linkage for rotor controls of rotary wing aircraft An anti-drive device for restraining against rotation the stationary ring of a rotor control system of a rotary wing aircraft includes a drive tube driveably connected to an engine through a transmission, a rotating ring driveably connected to the drive t... | 08/04/1992 |
| 4952120 | Control device for monocyclic pitch in a fixed reference system and multicyclic pitch in a rotating reference system for blades of rotors of rotor craft The invention relates to a control device for monocyclic pitch in a fixed reference system and multicyclic pitch in a rotating reference system, for the blades (7) of a rotor craft. In addition to conventional swashplates (27, 38), one (38) of which rotates ... | 08/28/1990 |
| 4648345 | Propeller system with electronically controlled cyclic and collective blade pitch A plurality of blades extend radially from a hub which is rotated by a motor about a drive axis. Each blade has a root which is rotatably connected to the hub so that it can be independently twisted to vary the pitch thereof relative to the drive axis. A ... | 03/10/1987 |
| 4540341 | Adjustable propeller for marine vessel drive The adjustable propeller has an adjusting mechanism for adjusting the pitch of the individual propeller blades. The adjusting mechanism comprises an actuator and a correction mechanism for each propeller blade for cyclically adjusting the pitch angle of a... | 09/10/1985 |
| 4534704 | Helicopter rotor control system with integrated hub A rotor control system for a helicopter in which the conventional swashplate is eliminated and the rotor hub is integrated to include an actuator for each rotor blade. Two arrangements are employed, each of which utilizes a hydraulic circuit. One arrangem... | 08/13/1985 |
| 4525123 | Rotary wing aircraft In a helicopter having a power shaft with a main axis and bearings for supporting an even number of blades for pivoting about their longitudinal axes, arms mounted on the respective blades for pivoting them in the same and opposite directions for cyclic a... | 06/25/1985 |
| 4461611 | Helicopter rotor with blade trailing edge tabs responsive to control system loading A helicopter rotor having blade trailing edge tabs which are actuated in response to control rod loading to reduce or cancel the blade pitching moments imposed upon the blade and hence the control rods by blade aerodynamic and inertial loads, or other loa... | 07/24/1984 |
| 4379678 | Individual blade control Individual blade control of a helicopter rotor is accomplished by rotation of a mast (10) about a standpipe (12) where an individual blade (16) is coupled to the mast through a hub (18). Pilot input signals are transmitted by fly-by-optic transmission lin... | 04/12/1983 |
| 4298313 | Horizontal axis wind generator having adaptive cyclic pitch control Cyclic pitch variation of the rotor blades of a horizontal axis wind energy conversion machine permit its operation at substantially design rotor speed and rotor torque over a range of wind speeds, by heading the rotor progressively out of the wind throug... | 11/03/1981 |
| 4127245 | Helicopter pitch rate feedback bias for pitch axis maneuvering stability and load feel The longitudinal cyclic pitch channel of a helicopter has a negative pitch rate feedback bias added thereto when flying at higher speeds, thereby to stabilize the pitch axis against aft-load maneuvering instability and/or to induce a requirement for the p... | 11/28/1978 |
