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| Number | Title | Issue Date |
| 8142156 | Ceiling fans with low solidity ratio An overhead fan system of a building comprises a ceiling fan underneath a nearby fire sprinkler head. The ceiling fan has particularly low fan solidity to minimize the fan obstructing the spray of water from the sprinkler head. To further reduce the obstruction, som... | 03/27/2012 |
| 7857591 | Fan with power deployed fan blade A fan comprising: a housing unit; a retractable fan blade; and a means for driving the retractable fan blade from a retracted position within the housing unit to an extended position exterior to the housing unit. ... | 12/28/2010 |
| 7568888 | Fan blades having variable pitch compliantly responsive to a linear actuator A variable pitch fan blade mechanism, particularly well suited for automotive applications, wherein the blade pitch is compliantly responsive to selective actuation of a linear actuator. A linear actuator is disposed in the fan shaft composed of an electric drive co... | 08/04/2009 |
| 7478995 | Device for locking a structure for securing a blade to the hub of a rotorcraft rotor A device for locking a holding structure for securing a foldable blade of a rotorcraft rotor to the hub of the rotor. The holding structure is hinged in pitch and in drag relative to the hub and the rotor includes, for the purpose of folding the blade, elements for ... | 01/20/2009 |
| 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 |
| 7207519 | Blade restraint system A blade restraint system for restraining a blade of a helicopter comprising a blade clamp releasably mounted to the blade and a pole pair releasably mountable to the blade clamp at a clamp end. The pole pair is releasably mountable to the helicopter fuselage at an a... | 04/24/2007 |
| 7204674 | Rotor blade for a wind power installation A rotor for a wind power installation having at least one rotor blade. The smaller the surface area on which the wind acts, that is to say in particular the rotor blade area, the correspondingly lower is the load level for which installation has to be designed and t... | 04/17/2007 |
| 7153100 | Ceiling fan with retractable fan blades A ceiling fan with retractable fan blades includes an electric motor operable to spin a rotor with a plurality of fan blades attached thereto. Each of the fan blades is operable to move between a closed position and an open position. A rotatable center ring is inclu... | 12/26/2006 |
| 7114924 | Blade pin alignment and positioning system for installation of helicopter rotor blades A blade pin alignment and positioning system for the installation of helicopter blade pins, including an elongated alignment pin and at least one drive member. The drive member is configured to mate with the top end of the alignment pin for use in driving the alignm... | 10/03/2006 |
| 7008172 | Side-furling co-axial multi-rotor wind turbine A multiplicity of horizontal axis rotors are coaxially attached, at spaced intervals, to an elongate driveshaft. This driveshaft with attached rotors is aimed, not directly into the wind, but at a slightly offset angle, allowing each rotor to encounter a wind stream... | 03/07/2006 |
| 6929450 | Turbine apparatus and method A turbine system (10) for capturing energy from a fluid stream includes a torque arm (12). At least a pair of, preferably symmetrical clam shell, turbine blades (14) with the upper (16) and lower (18) halves are oppositely connecte... | 08/16/2005 |
| 6860450 | Apparatus and method for folding helicopter rotor blades for storage and transport of helicopter A method comprises providing six helicopters. Each helicopter has a fuselage, a main rotor assembly extending out from the fuselage and rotatable about a main rotor axis, and four main rotor blades coupled to the main rotor assembly. The main rotor blades of each he... | 03/01/2005 |
| 6860713 | Fan with collapsible blades, redundant fan system, and related method A redundant fan system for a computer includes two fans installed in series with at least one of the fans having collapsible blades. A fan system of this type reduces the fan inefficiency caused when one fan in a series mounted pair is not operating, either because ... | 03/01/2005 |
| 6783327 | Helicopter blade folding with blade droop Blade fold hinge units are attachable between each helicopter blade and its hub attachment point, while maintaining continuity of mechanical connection of each blade to its hub portion. A two portion hinge unit has a first portion for blade attachment and a second p... | 08/31/2004 |
| 6769644 | Tail boom saddle for maintaining helicoptor main rotor blades in a stowed configuration for helicopter stowage and transport A tail boom saddle for use with a helicopter. The helicopter has a fuselage, a main rotor assembly extending out from a forward section of the fuselage, and a plurality of main rotor blades operatively coupled to the main rotor assembly. A tail boom section of the f... | 08/03/2004 |
| 6752596 | Rotary-wing aircraft rotors with manually folding blades and electrical connection installation On the rotor, between each blade and the member for linking with the hub, an electrical connecting cable comprises a first section of which one part is held above that one of the two blade pins which is the pivot pin about which the blade can be folded by pivoting, ... | 06/22/2004 |
| 6682302 | Turbine apparatus and method A turbine system (10) for capturing energy from a fluid stream includes a torque arm (12). At least a pair of, preferably symmetrical clam shell, turbine blades (14) with the upper (16) and lower (18) halves are oppositely connected to the torque arm (12)... | 01/27/2004 |
| 6676377 | Device for simultaneously interlocking a plurality of actuators The invention relates to a device (3) for simultaneously interlocking a plurality of actuators (1) by means of a first locking element (5) which is assigned to each final control element (2) of an actuator (1) and which interacts with a second locking ele... | 01/13/2004 |
| 6547519 | Blower impeller apparatus with pivotable blades Blower designs for vented enclosures include an impeller having a plurality of blades. The impeller includes a plurality of blades pivotably coupled to an impeller body. The blades pivot to enable operation in one of a closed and an open state. Air flow b... | 04/15/2003 |
| 6485261 | Rotary-wing aircraft rotors with automatically folding blades and electrical connection installation for the blades On the rotor, between each blade integral with its folding mount and the member for linking with the hub, an electrical connecting cable comprises a first section of which one part is held, in any position of the blade about the folding axis, above the mo... | 11/26/2002 |
| 6481965 | Rotary-wing aircraft rotors with manually folding blades and electrical connection installation On the rotor, between each blade and the member for linking with the hub, an electrical connecting cable comprises a first section of which one part is held above that one of the two blade pins which is the detachable pin whose withdrawal allows the foldi... | 11/19/2002 |
| 6447249 | Rotocraft rotor with folding blades and deicing electrical connection installation On the folding-blade rotor, an outer radial length of an electric cable for connection between the hub and a blade has a part forming spare length and wound into an S-shape around two reels each mounted at the end of one of the two blade pins that connect... | 09/10/2002 |
| 6220025 | Stator for torque converter A torque converter is provided with a stator assembly having a nonrotatable body portion and a plurality of blades pivotally attached to the body portion. The plurality of blades are pivotable between a first position for providing torque multiplication a... | 04/24/2001 |
| 6213712 | Helicopter blade positioning mechanism for foldable rotor blades An improved blade positioning mechanism for folding a helicopter blade attached to a pitch control housing permits a controlled folding of the main rotor blade for increased safety and decreased risk of damage to the helicopter or other equipment. The inv... | 04/10/2001 |
| 6176679 | Rotor with folding blades, for the rotary wings of an aircraft The rotor comprises a hub 2 rotated with a mast 1 about an axis of the rotor ZZ, and each blade 3 is connected to the hub 2 by a member 5 on which the blade 3 is mounted so that the blade 3 can pivot about an axis of folding BB between a flight position a... | 01/23/2001 |
| 6126398 | Two-piece rotor blade for a bearingless rotor of a helicopter A rotor blade for a bearingless rotor of a helicopter includes a lift-generating airfoil blade, a flexbeam connecting the airfoil blade to a rotor head, and a control sleeve enclosing the flexbeam. The junction between the flexbeam and the airfoil blade i... | 10/03/2000 |
| 6036442 | Device for folding of a helicopter rotor blade The device comprises a detachable distance-piece (19') with a pivot (20) retained in a pivoting way in the yoke (7b) of a member (7) connecting a blade (4) to the hub, by one of the two blade pins (15) and a distance-piece yoke (22') in which the blade ro... | 03/14/2000 |
| 6032899 | Blade pitch locking device for a main rotor of a rotary-wing aircraft The present invention relates to a device for locking the pitch of the blades of a main rotor of a rotary-wing aircraft in which each blade is firstly rotated about an axis of rotation of the rotor by a rotor mast and is secondly constrained to pivot abou... | 03/07/2000 |
| 5951252 | Helicopter flap lock assembly A flap lock device for restraining the flapping movement of a main rotor blade assembly on a helicopter. The flap lock device includes an first elongate frame member which extends between a first end and a second end and second elongate frame member which... | 09/14/1999 |
| 5934875 | Removable helicopter mast A helicopter's main rotor blades are removably attached to a hub, which is rotatably mounted on a mast. The base of the mast is attached to the helicopter's body by unthreaded, expandable bushing bolts. When inserted, the bolts' centerlines lie in a plane... | 08/10/1999 |
| 5868351 | Rotor blade stowing system Rotor blade stowing system for stowing rotor blades that conserves storage space without adding significant weight or cost to the aircraft. The system includes a rotary actuator disposed on a blade grip member. A rotor blade is pivotally connected to the ... | 02/09/1999 |
| 5782606 | Device for folding a rotorcraft rotor blade The folding device comprises a fitting pivoting on a cuff about a folding axis which is offset laterally thanks to two lateral bearings of the fitting journal-mounted about bushings retained in lateral devises of the cuff and which are coaxial about the a... | 07/21/1998 |
| 5769606 | De-icing connection installation for rotorcraft rotor The installation links a supply conductor to an electrical device for de-icing a blade using at least one cable with a first stretch linked to the supply conductor by a connector and to a second stretch with an overhead hook in the form of flattened half ... | 06/23/1998 |
| 5716193 | Installation for affording electrical continuity for rotorcraft rotor The installation for removing electrostatic charge and passing lightning current between a conductor of each blade of the rotor and a metallic part of the hub comprises at least one conductive member integral with the member for linking the blade to the h... | 02/10/1998 |
| 5562413 | Variable propeller for boat A plurality of blade shafts spline-connected to bosses of a plurality of propeller blades are rotatably carried on a propeller boss parallel to the axis of the boss, the propeller blades being rotated so as to increase the propeller-diameter D according t... | 10/08/1996 |
| 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 |
| 5343823 | Large diameter low RPM propeller for torpedoes A propulsion system for a submerged vehicle which operates at a relatively low RPM includes a pair of coaxial drive shafts for producing counterrotating torques. A first propeller unit is attached for rotation with one of the drive shafts and a second pro... | 09/06/1994 |
| 5322415 | Pitch actuation system restraint device for a helicopter blade folding system A pitch actuation system restraint (PASR) device that provides, inter alia, protection for the pitch actuation system of a helicopter having a main rotor assembly configured for main rotor blade folding operations. The PASR device includes permanent adapt... | 06/21/1994 |
| 5249926 | Blade retention pin system for a helicopter blade folding system A blade retention pin system is operative to secure the blade cuff of a main rotor blade of a helicopter in combination with a spindle assembly of the main rotor hub assembly for main rotor assembly operations and is readily reconfigurable to accommodate ... | 10/05/1993 |
| 5211538 | Method for folding helicopter main rotor blades A method of folding the main rotor blades of a helicopter for storage in which blade supports are removably attached to the nose and tail of the fuselage of the helicopter. A first and second main rotor blades then are aligned with the longitudinal axis r... | 05/18/1993 |
