Bizarre Patents
User-operated amusement apparatus for kicking the user's buttocks
An apparatus including a user-operated and controlled apparatus for self-infliction of repetitive blows to the user's buttocks by a plurality of elongated arms bearing flexible extensions that rotate under the user's control.
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| Number | Title | Issue Date |
| 7275711 | Gas-powered tip-jet-driven compound VTOL aircraft A compound Vertical TakeOff and Landing (VTOL) aircraft. In a specific embodiment, the VTOL aircraft includes a gas-powered tip-jet driven rotary-wing and a fixed-wing that is capable of providing necessary lift to the aircraft during certain forward-flight regimes ... | 10/02/2007 |
| 7198469 | Wind generator of the type with automatic power regulation The invention relates to a wind generator of the type with automatic power regulation, comprising at least one propeller having at least two blades (21), whereby the efficiency of one propeller varies inversely to a variation in the wind energy, from a lower ... | 04/03/2007 |
| 7119453 | Direct drive wind turbine A wind turbine is provided that minimizes the size of the drive train and nacelle while maintaining the power electronics and transformer at the top of the tower. The turbine includes a direct drive generator having an integrated disk brake positioned radially insid... | 10/10/2006 |
| 7109600 | Direct drive wind turbine A wind turbine is provided that minimizes the size of the drive train and nacelle while maintaining the power electronics and transformer at the top of the tower. The turbine includes a direct drive generator having an integrated disk brake positioned radially insid... | 09/19/2006 |
| 7068015 | Wind power plant having magnetic field adjustment according to rotation speed A wind power plant where the driving shaft communicates with a synchronous generator (3) optionally through a gear (2) and with a transformer, if any, communicating through an AC/DC inverter 7 with an HVDC transmission cable 9. The synchr... | 06/27/2006 |
| 6986642 | Extreme mu rotor A rotor for a rotary wing aircraft includes a blade having a leading edge, and a trailing edge. The rotor has a leading edge tip extension at a tip of the blade and a weight within the leading edge tip extension. The rotor also includes a trailing edge tip extension... | 01/17/2006 |
| 6942458 | Variable pitch fan An improved variable pitch fan comprising a fan hub, with fan blades extending radially outward from the fan hub and mounted for rotation about respective radially extending axes corresponding to each fan blade. Each fan blade has a blade surface extending perpendic... | 09/13/2005 |
| 6767186 | Fan with automatic failure mode An airflow apparatus (e.g., a fan, a blower) is provided for impeding or facilitating airflow through a channel when the apparatus is inoperative. The apparatus comprises a set of blades or airfoils that, when operating, promote or force a flow of air through the ch... | 07/27/2004 |
| 6520740 | Energy efficient fan One or more fan blades extend radially from a hub that is freely rotatable relative to a main drive shaft. The hub is coupled to the drive shaft so that, when the drive shaft is moved through an orbital path in a cyclical motion, the hub moves in a twirli... | 02/18/2003 |
| 6155784 | Variable pitch aircraft propeller A propeller for aircraft has a tip-to-tip flex-beam spar and torsionally stiff hollow blades bonded to the spar throughout an outer portion of the blades. The spar has two end caps which are separated from each other at the hub and converge in the outer p... | 12/05/2000 |
| 6139271 | Helicopter rotor blade weighting Rotor blade weighting apparatus comprising in combination at least one elongated rod carried within a rotor blade, and multiple weights received and retained on the rod, the number of weights adjustable for reducing vibration during rotor rotation.... | 10/31/2000 |
| 5836743 | Variable pitch counterweighted propeller system with releasable hydraulic pitchlock The hydraulic propeller system of the present invention has a central hub including a stationary portion and a rotatable portion. A plurality of propeller blades are connected with the rotatable portion, wherein each of the plurality of propeller blades h... | 11/17/1998 |
| 5570997 | Horizontal windmill with folding blades Windmill (10) having a plurality of hydrodynamic, folding blades (12, 14, 16 and 18) secured to a hub (64). The blades are propelled by wind current such that the windmill rotates about a central axis of a shaft (20) on which a hub (64) is journalled. Eac... | 11/05/1996 |
| 5505589 | Controllable variable twist rotor blade assembly A controllable variable twist rotor blade assembly wherein the twist along the span of the blade is continuously variable and may be controlled either manually by the pilot or automatically according to data input from flight sensors monitoring flight par... | 04/09/1996 |
| 5494406 | Propeller for boat A propeller for a boat having a plurality of recesses and a plurality of land portions arranged circumferentially alternately around an outer periphery of a propeller boss which is fitted over and connected to a propeller shaft. A boss of each of propelle... | 02/27/1996 |
| 5326223 | Automatic variable pitch marine propeller with mechanical holding means There is provided a self-actuating variable pitch marine propeller which incorporates two or more blades, each independently rotatable, relative to the propeller hub, between a first lower and a second higher pitch. The blades are preferably mechanically ... | 07/05/1994 |
| 5290147 | Variable pitch marine propeller with shift biasing and synchronizing mechanism A marine propeller includes a hub rotatable about a longitudinal axis and having a plurality of blades extending radially outwardly therefrom and pivotable about respective radial pivot axes between a low pitch position and a high pitch position. A disc h... | 03/01/1994 |
| 5240374 | Damped automatic variable pitch marine propeller There is provided a self-actuating variable pitch marine propeller which incorporates two or more blades, each independently rotatable, relative to the propeller hub, between a first lower and a second higher pitch. The blades are preferably mechanically ... | 08/31/1993 |
| 5219272 | Variable pitch marine propeller with hydrodynamic shifting A marine propeller includes a hub rotatable about a longitudinal axis and having a plurality of blades extending radially outwardly therefrom and pivotable about respective radial pivot axes between a low pitch position and a high pitch position. Each bla... | 06/15/1993 |
| 5183386 | Vertical axis sail bladed wind turbine A vertical axis turbine is provided which comprises a plurality of flexible sail blades attached to a vertically extending, rotatable shaft by upper and lower blade attachment devices, and a power absorbing load device coupled to the rotatable shaft. The ... | 02/02/1993 |
| 5171127 | Vertical axis sail bladed wind turbine A vertical axis turbine is provided which comprises a plurality of flexible sail blades attached to a vertically extending, rotatable shaft by upper and lower blade attachment devices, and a power absorbing load device coupled to the rotatable shaft. The ... | 12/15/1992 |
| 4950131 | High-efficiency turbine, in particular for exploiting wind power in auxiliary power sources for aeronautical applications This high-efficiency turbine, in particular for the exploitation of wind power for auxiliary power sources in aeronautical applications, comprises a central body which is rotatable about the axis of the turbine and supports at least two vanes which extend... | 08/21/1990 |
| 4929153 | Self-actuating variable pitch marine propeller There is provided a self-actuating, variable pitch propeller having a plurality of blades. All of the blades are automatically movable between a first, relatively lower pitch position and a second, relatively higher pitch position, substantially simultane... | 05/29/1990 |
| 4913623 | Propeller/fan-pitch feathering apparatus A pitch feathering system for a gas turbine driven aircraft propeller having multiple variable pitch blades utilizes a counter-weight linked to the blades. The weight is constrained to move, when effecting a pitch change, only in a radial plane and about ... | 04/03/1990 |
| 4818180 | Vertical-axle wind turbine An apparatus relating to a vertical-axle wind turbine comprises fore eccentric compressible and tensible slide-cantilevers, rear eccentric tensible ropes, dual-rocker trapezoid linkages, slightly inclined flap-blades, and counter-lever with equipoises. Ac... | 04/04/1989 |
| 4810164 | Pitch change arrangement for a variable pitch fan A pitch arrangement for a variable pitch fan assembly of a turbofan gas turbine engine comprises a plurality of fan blades, each of which has a root portion rotatably mounted, in a thrust bearing on a fan rotor. A control ring is arranged coaxially with a... | 03/07/1989 |
| 4799860 | Wind-energy converter A wind energy converter with a rotor having a vertical swivelling axis has n each rotor arm a vertical vane that is supported so as to be able to pivot about an approximately vertical pivotting axis on the leading edge of the vane. A balance weight is inst... | 01/24/1989 |
| 4718821 | Windmill blade A self-starting windmill of the vertical axis type. Upstanding helical in configuration, pivotally mounted outer blade members surround a central, rotatably mounted shaft are connected to the shaft by radially disposed strut members. Arcuate in planform, ... | 01/12/1988 |
| 4718822 | Vertically oriented wind driven assembly A self-governing, vertically oriented wind driven assembly is provided by a pair of open, semicylindrically shaped wind scoops with elongated edges which face each other in a nearly closed position at times of high or maximum wind speeds, and partically f... | 01/12/1988 |
| 4678923 | Windmill A windmill for generating electricity in which each blade of the air-screw is connected to the hub by means of at least two resilient strips which are oppositely inclined both in the plane of rotation of the blade and in a plane extending through the rota... | 07/07/1987 |
| 4671742 | Water supply system, energy conversion system and their combination Water supply system comprising a unit for converting the wind energy into kinetic energy, a unit for converting the kinetic energy into another usable form of energy and a unit for supplying water driven by that usable form of energy. According to the imp... | 06/09/1987 |
| 4641039 | Wind motors and aerogenerators An aerogenerator or wind motor comprises a variable pitch propeller rotor. It comprises compensation means (13) which are sensitive to the deceleration of the rotor to automatically exert on each blade (3), in case of deceleration of the rotor, a force wh... | 02/03/1987 |
| 4452568 | Means for limiting rotation speed of a vertical shaft wind turbine Means for limiting rotational speed in a vertical shaft wind turbine (1) having a central hub (3) and spokes (4) extending therefrom. Spokes lying over each other support at their ends turbine blades (6) placed concentrically around the turbine shaft. Eac... | 06/05/1984 |
| 4430044 | Vertical axis wind turbine A wind turbine is disclosed comprising blade forms mounted for limited pivotal movement as they proceed around an orbital path. A torque sensitive control means is provided to progressively limit the pivotal movement of the blade forms in response to chan... | 02/07/1984 |
| 4423333 | Horizontal axis wind energy conversion system with aerodynamic blade pitch control The horizontal axis wind turbine converts wind into electrical energy and includes a pitch control vane with a flyweight mechanism on each rotor blade to provide aerodynamic efficiency at operating wind velocities, near constant speed and zero lift pitch ... | 12/27/1983 |
| 4415312 | Transverse axis fluid turbine A fluid turbine, the rotation axis of which is transverse to the direction of fluid flow, has at least two blade assemblies mounted for rotation about the rotation axis. Each blade assembly includes a streamlined elongated blade having a span parallel to ... | 11/15/1983 |
| 4406586 | Device to convert the energy of a fluid in motion A device to convert wave energy into mechanical energy, comprises a buoyant structure whose upper portion is in the region of wave action but whose lower section is below the region of wave action, so that the water adjacent the upper and lower sections o... | 09/27/1983 |
| 4365935 | Wind-driven prime mover A vertical type wind-driven prime mover comprises a vertically extending rotative main shaft, a plurality of horizontal support arms radially extending from the main shaft, a rectangular support frame body pivotally connected to the outer end of each of t... | 12/28/1982 |
| 4352629 | Wind turbine A wind turbine of the type having an airfoil blade (15) mounted on a flexible beam (20) and a pitch governor (55) which selectively, torsionally twists the flexible beam in response to wind turbine speed thereby setting blade pitch, is provided with a lim... | 10/05/1982 |
| 4334823 | Wind or fluid current turbine A turbine responsive to a moving fluid, which can be wind or another fluid, wherein a rotatable central shaft supports at least one radial arm with a blade assembly at the free end of the radial arm. The blade assembly includes a rocking arm pivotted on t... | 06/15/1982 |
