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| Number | Title | Issue Date |
| 8066481 | Balancing a ram air turbine A method of balancing a ram air turbine that has a turbine shaft with a turbine shaft axis, a rotor attached to the shaft, rotor blades attached to the rotor that move between a fine pitch and coarse pitch position, a spring-loaded governor for controlling the posit... | 11/29/2011 |
| 7419357 | Ram air turbine blade disengagement mechanism for over-speed prevention An improved ram air turbine (RAT) prevents release of its turbine blades due an over-speed condition by detecting an over-speed condition with a trigger mechanism and rotating the blades to a fixed coarse pitch position with a release mechanism. ... | 09/02/2008 |
| 7371135 | Vertical axis wind turbine rotor construction A Savonius vertical axis wind turbine (VAWT) rotor is easily and simply constructed while having enhanced functionality. The rotor includes a shaft that is vertical in use, a number (desirably at least four) of vane support hubs each having a number (desirably three... | 05/13/2008 |
| 7354246 | Electronics cooling fan with collapsible fan blade An electronics cooling fan comprises at least one collapsible fan blade driven by centrifugal force to extend radially as the fan spins and driven by elastic force to retract as spinning slows or stops. ... | 04/08/2008 |
| 7323791 | Louvered horizontal wind turbine A wind turbine, including: a rotatable frame; a plurality of airfoils extending in a direction parallel to an axis of rotation of the rotatable frame; and an enclosure surrounding the rotatable frame, wherein the enclosure comprises a plurality of moveable members c... | 01/29/2008 |
| 7296970 | Ram air turbine speed sensing ball detent over-speed prevention mechanism A ram air turbine (RAT) prevents release of its turbine blades due an over-speed condition by detecting an over-speed condition with a turbine hub-mounted centrifugally operated trigger mechanism and rotating the blades to a fixed coarse pitch position with a releas... | 11/20/2007 |
| 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 |
| 7186083 | Wind energy conversion device A wind energy conversion device includes a propeller in which each of the propeller blades includes a proximal (radially inward) non-airfoil mounting section, a medial section and a distal tip section mounted to pivot relative to the medial section about a pitch axi... | 03/06/2007 |
| 7137785 | Wind power station A wind power station has at least one rotor. The rotor has at least one rotor blade, preferably two or more rotor blades. The rotor blade is operatively connected to a rotor shaft. The rotor blade can rotate about a substantially radially extending adjustment axis. ... | 11/21/2006 |
| 7132760 | Wind turbine device A hybrid blade wind turbine device formed of at least a pair of straight outer airfoil blades, and a pair of inner helical wing blades, as supported for rotation within a safety protective cage structure, which wind turbine can be mounted in the vertical, horizontal... | 11/07/2006 |
| 7074010 | RAM air turbine over-speed protector using redundant yoke plate linear bearings An improved ram air turbine for generating emergency aeronautical supplemental power with a plurality of concentric or nested linear bearings for supporting a speed governor yoke plate on a speed governor shaft comprising a movable sleeve that supports the yoke plat... | 07/11/2006 |
| 7044713 | Wind power generator with multiple rotary wings A wind power generating apparatus having a plurality of rotary wings can reduce the load and resistance on the rotary wings due to wind to obtain a highly effective rotation power as well as to flexibly absorb the impact applied to the rotary wings due to varying wi... | 05/16/2006 |
| 6935841 | Fan assembly A fan assembly includes a vertical axis wind turbine (VAWT) which is coupled to an air extraction or air supply fan. The VAWT is located above and is coupled coaxially to the fan. The fan assembly also includes an auxiliary turbine to provide start-up torque to init... | 08/30/2005 |
| 6910873 | Self regulating rotor A machine that is a self regulating rotor with a set of cups or vanes that are pivotally attached about a central axis such that they form a closed three dimensional shape when closed, and when rotated into an open orientation form an S-shaped rotor, when viewed as ... | 06/28/2005 |
| 6761533 | Pitch governing assembly for windmills A pitch governing mounting assembly for a windmill blade and a windmill incorporating such an assembly. The assembly has a first member coupled to a second member in a manner which causes simultaneous axial and rotational movement of the second member relative to th... | 07/13/2004 |
| 6082968 | Centrifugally activated variable damper assembly A centrifugally activated variable damper assembly for a stopped-rotor aircraft is disclosed for adjusting dampening level of teetering motions produced by the rotors during the in-flight conversion process from rotary-wing to fixed-wing flight, or vise v... | 07/04/2000 |
| 5897293 | Counterweighted propeller control system A system for controlling functions of a propeller having a plurality of blades is disclosed. The system comprises an electronic control for controlling the functions of the propeller. A plurality of backup devices are provided for backing up the electroni... | 04/27/1999 |
| 5820341 | Device with retractable double anti-cone stops ring, and rotor head including it The device includes anti-cone stops projecting outward from at least two coaxial rings that can rotate about the rotor axis on the top face of the hub. Flyweights are each mechanically joined to one of the rings by a mechanism for driving the latter in ro... | 10/13/1998 |
| 5779446 | Air driven turbine including a blade pitch control system An air driven turbine having variable pitched blades is provided that includes a pitch change mechanism and associated control circuits for automatically adjusting the pitch of the blades during either rotating or non-rotating operational modes of the air... | 07/14/1998 |
| 5588801 | Flap stops device with retractable upper stops ring, and rotor head including it The device comprises anti-cone stops projecting outwards from a common ring that can rotate about the rotor axis on the top face of the hub and flyweights are each individually joined to the ring for driving the latter in rotation from the "ground" positi... | 12/31/1996 |
| 5487645 | Ram air turbine with secondary governor A ram air turbine is provided for use in driving electric and/or hydraulic power systems in an aircraft, wherein the ram air turbine includes primary and secondary speed control governors. The primary governor includes centrifugal flyweights for cam-actua... | 01/30/1996 |
| 5456579 | Wind turbine blade with governor for maintaining optimum rotational speeds A wind turbine blade with governor for maintaining optimum rotational speeds comprising, in combination: a main body portion with a linear leading edge and a trailing edge, a trailing edge, a tip end and an axis end, the leading edge being linear and fixe... | 10/10/1995 |
| 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 |
| 5129785 | Automatic variable discrete pitch marine propeller A self-actuating variable pitch marine propeller which incorporates two or more blades having cylindrical shafts which are rotatably connected to a central hub via cylindrical joints; the blades rotate about and translate radially, relative to the hub cen... | 07/14/1992 |
| 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 |
| 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 |
| 4743163 | Ram air turbine control system A blade pitch control mechanism for a ram air driven turbine blade mounted for rotation on a hub assembly having a central axis. A governor control member, including a seat, is mounted on a portion of the hub assembly for reciprocation along the central a... | 05/10/1988 |
| 4720241 | Ceiling fan A spinner-type electrical ceiling fan having a three part housing which includes a top plate, a central annular band and a bottom plate. The top and bottom plates have depressed, bearing-receiving hubs disposed therein at a central location. An iron armat... | 01/19/1988 |
| 4701104 | Ram air turbine Complexity, and thus reliability difficulties, are avoided in a ram air turbine including a stationary shaft 14 defining an axis of rotation 16. A hub 24 is journalled on the shaft 14 and in turn movably mounts at least one blade 38 for positioning betwee... | 10/20/1987 |
| 4632637 | Wind turbine A high speed, downwind horizontal axis wind turbine includes three circumferentially spaced lightweight blades having inner support arms and radially outwardly disposed airfoil configured blade segments which are pivotally connected to the support arms, s... | 12/30/1986 |
| 4609152 | Method and apparatus for applying powdered substances on farm fields, forests and swamp areas Wind-powered apparatus for applying a powdered substance over a given area including a housing designed to receive a quantity of the powdered substance, a sieve located within the housing and a wind motor assembly. The powdered substance is contained with... | 09/02/1986 |
| 4507049 | Wheel intended to work with a fluid A wheel intended to work with a fluid includes wing-shaped components (2) arranged around a central shaft (1) generally perpendicular to the direction of relative movement of the fluid (5). The wing-shaped components are articulated along pivoting axes (3... | 03/26/1985 |
| 4500257 | Wind turbine spoiler An aerodynamic spoiler system for a vertical axis wind turbine includes spoilers on the blades initially stored near the rotor axis to minimize drag. A solenoid latch adjacent the central support tower releases the spoilers and centrifugal force causes th... | 02/19/1985 |
| 4483657 | Wind turbine rotor assembly A vertical axis wind turbine having a horizontal arm member which supports an upright blade assembly. Bearing structure coupling the blade assembly to the turbine arm permits blade movement about its longitudinal axis as well as flexing motion of the blad... | 11/20/1984 |
| 4447738 | Wind power electrical generator system A wind power electrical generator system having improved efficiency including a wind mill which activates an air compressor to generate a supply of pressurized air. An air motor activated by the supply of pressurized air drives a generator to produce elec... | 05/08/1984 |
| 4411596 | Ram air turbine control system The present invention relates to an improved blade pitch control mechanism for an air driven turbine blade mounted for rotation in a hub assembly. The control mechanism includes a drive member mounted for reciprocation along a central axis of the hub asse... | 10/25/1983 |
| 4363241 | Rotational speed governor An improved rotational speed governor characterized by a non-linear response to speed changes, includes a control arm, the angular position of which changes in response to the rotational speed of the governor, the control arm carrying a weight held to a f... | 12/14/1982 |
| 4316699 | Windmill structure and power generator A windpower generator which includes a cupped blade design to be assembled from flat module sheets together with a resiliently biased mount to provide automatic feathering with a consequent speed control. A generator or alternating generator to feed elect... | 02/23/1982 |
| 4293274 | Vertical axis wind turbine for generating usable energy A wind turbine for converting wind forces into usable energy has a main shaft rotatably mounted in the axis of rotation for the wind turbine, and a pair of coacting complementary longitudinally extending vane members are connected to each other by a plura... | 10/06/1981 |
