Patent application number | Description | Published |
20110262278 | FAN BLADE RETENTION SYSTEM - A fan comprises a rotatable hub assembly having an inner anchor assembly, a plurality of fan blades, a motor assembly, and a plurality of cables. The outer ends of the cables are coupled to the outer ends of the fan blades, and the inner ends of the cables are coupled to the inner anchor assembly. The inner anchor assembly may further include a disc-shaped plate and a plurality of inner anchor members to which the cables may be coupled. The inner anchor members may include a rear anchor portion and fore anchor portion, and these anchor portions may be angularly offset. A plurality of winglets and/or outer anchor members may be coupled to the outer ends of the fan blades to which the outer ends of the cables may be coupled. The outer ends of the cables may further comprise swaged tips outboard of the winglets and/or outer anchor members. | 10-27-2011 |
20150037164 | AIRFOIL FOR FAN BLADE - A fan blade comprises an airfoil profile having a lower surface, an upper surface, a trailing edge, and a leading edge. The lower surface comprises a concave portion which is defined by a first ellipse. The upper surface comprises a convex portion which is defined by a second ellipse. The leading edge and the trailing edge are of a substantially convex shape and transition the concave shape of the lower surface to the convex shape of the upper surface. A maximum thickness of the airfoil profile is defined at a point along the airfoil profile proximal to the leading edge of the fan blade. A chord length is defined as a lineal distance between an outermost point of the leading edge and an outermost point of the trailing edge. The dimensions of the airfoil profile, including those of the first ellipse and second ellipse, are functions of the chord length. | 02-05-2015 |
20150078902 | FAN BLADE RETENTION SYSTEM - A fan comprises a rotatable hub assembly having an inner anchor assembly, a plurality of fan blades, a motor assembly, and a plurality of cables. The outer ends of the cables are coupled to the outer ends of the fan blades, and the inner ends of the cables are coupled to the inner anchor assembly. The inner anchor assembly may further include a disc-shaped plate and a plurality of inner anchor members to which the cables may be coupled. The inner anchor members may include a rear anchor portion and fore anchor portion, and these anchor portions may be angularly offset. A plurality of winglets and/or outer anchor members may be coupled to the outer ends of the fan blades to which the outer ends of the cables may be coupled. The outer ends of the cables may further comprise swaged tips outboard of the winglets and/or outer anchor members. | 03-19-2015 |
Patent application number | Description | Published |
20100232076 | METHOD FOR MITIGATING NEGATIVE SEQUENCE EFFECT RESULTING FROM NON-SYMMETRICAL SHORT CIRCUIT FAILURE OF SYNCHRONOUS ELECTRIC MACHINE BASED SYSTEMS - A drive system for a multi-phase electric machine with a permanent magnet rotor, the drive system may comprise conduction paths for each phase. Detectors on each of the conduction paths may determine electrical condition of the conduction path. At least one selectable interconnection path may be present between all of the conduction paths. The at least one selectable interconnection path may be operable to connect all of the conduction paths together responsively to one or more of the detectors determining that the electrical condition of its respective electrical path is representative of a predetermined electrical fault condition so that heating of the rotor during continued rotation of the rotor is prevented. | 09-16-2010 |
20140339938 | GAS TURBINE ENGINE ACTUATION SYSTEMS INCLUDING HIGH TEMPERATURE ACTUATORS AND METHODS FOR THE MANUFACTURE THEREOF - Embodiments of a gas turbine engine actuation system are provided, as are embodiments of a high temperature actuator and methods for the manufacture thereof. In one embodiment, the gas turbine engine actuation system includes an actuated gas turbine engine component and a high temperature actuator, which has a rotor mechanically linked to the actuated gas turbine engine component and a stator surrounding at least a portion of the rotor. The stator includes, in turn, a coil support structure having a plurality of spokes extending radially therefrom. A plurality of pre-formed electromagnetic coils is circumferentially distributed about the coil support structure. Each of the plurality of pre-formed electromagnetic coils is inserted over at least one of the plurality of spokes in a radial direction. The stator further includes an inorganic dielectric material in which each of the plurality of pre-formed electromagnetic coils is at least partially embedded. | 11-20-2014 |
20140368066 | AIR COOLING OF A MOTOR USING RADIALLY MOUNTED FAN - A motor cooling system is provided comprising an electric motor including a rotor having first and second axial ends, and a stator having first and second axial ends, a motor housing surrounding the motor including an air chamber extending around the motor and axially along the motor length, a motor enclosure enveloping the motor housing, and a cooling fan radially mounted to the motor enclosure and adapted to operatively cool said electric motor. | 12-18-2014 |
20150078879 | AIRCRAFT ENGINE COWL DOOR MOVEMENT CONTROL SYSTEM AND METHOD - A system and method are provided for controlling the movement of an aircraft engine cowl door between an open position and a closed position. The system includes an electric motor, at least one actuator, and an electrically operated brake. The actuator is coupled to the motor and is operable to move the cowl door between the closed and the open position. The electrically operated brake is coupled to the electric motor and the at least one actuator and is configured, upon being energized, to supply a unidirectional resisting torque load to the electric motor that does not prevent motor rotation. | 03-19-2015 |
20150256045 | MULTI-DIRECTIONAL AIR COOLING OF A MOTOR USING RADIALLY MOUNTED FAN - An airflow system may comprise a fan radially mounted on a motor with a first plurality of fins surrounding the motor disposed to provide airflow in a first direction, and a second plurality of fins surrounding the motor disposed to provide airflow in a second direction. A housing may surround the plurality of fins. | 09-10-2015 |
Patent application number | Description | Published |
20090097975 | Ceiling Fan with Concentric Stationary Tube and Power-Down Features - A fan system comprises a hub, a plurality of fan blades, a drive system, and a stationary tube. The hub is configured to rotate. The fan blades are mounted to the hub. The drive system comprises a rotatable hollow output shaft. The hollow output shaft is in communication with the hub, such that the drive system is operable to rotate the hub via the hollow output shaft. The stationary tube is inserted through the hollow output shaft. The stationary tube is configured to remain stationary as the hollow output shaft rotates. Wires and the like may be passed through the stationary tube, to reach an accessory mounted at the bottom of the stationary tube. The fan system may also include a detector, such as a heat detector, a smoke detector, or an accelerometer. The detector may power down the fan system in response to detecting certain conditions. | 04-16-2009 |
20090208333 | Ceiling Fan System with Brushless Motor - A fan system includes a motor, a rotatable hub, and a plurality of fan blades. The motor is coupled with the hub by a hollow drive shaft, such that the drive system of the fan system is gearless. The motor is controlled by a PFC-based control module, which is in communication with sensors that are configured to sense parameters associated with operation of the fan system. The control module is configured to react in certain ways to certain conditions detected by the sensors, such that the fan system uses feedback-based control algorithms. A remote control panel is in communication with the control module. The remote control panel is operable to display fault conditions detected by the sensors. Blade retainers prevent fan blades from falling when a fan blade breaks free from the hub. Pins prevent the hub from falling when the hub breaks free from the rotor. | 08-20-2009 |
20100104461 | Multi-Part Modular Airfoil Section and Method of Attachment Between Parts - A fan system includes a motor, a rotatable hub, and a plurality of fan blades. Each of the fan blades includes a substantially rigid spine member, a resilient leading edge member, and a resilient trailing edge member. The leading edge member and trailing edge members are removably coupled with the spine member, such that different leading edge members and different trailing edge members may be chosen to customize the leading and trailing edges of the fan blades. Each fan blade may have more than one type of leading edge member or more than one type of trailing edge member. The leading edge member and trailing edge member may each be coupled with the spine member by urging the leading edge member and trailing edge member in a direction that is substantially perpendicular to the longitudinal axis defined by the spine member. | 04-29-2010 |
20100278637 | Ceiling Fan with Variable Blade Pitch and Variable Speed Control - A fan comprises a hub, fan blades, and inserts. The hub comprises outwardly extending mounting tabs that lie along a common horizontal plane. The fan blades are hollow, such that each mounting tab is inserted in the hollow interior of a corresponding fan blade. Each insert is positioned in the hollow interior of each fan blade, between each mounting tab of the hub and the interior surface of the corresponding fan blade. Each insert is configured to position and maintain the chord line of each corresponding fan blade at an oblique angle relative to the horizontal plane of the hub. A kit may include several insert sets to choose from to provide adjustable angle of attack. A fan control system includes a dimmer switch and a control module, which allows the dimmer switch to be used to infinitely adjust the speed of a fan motor within a range. | 11-04-2010 |
20110262278 | FAN BLADE RETENTION SYSTEM - A fan comprises a rotatable hub assembly having an inner anchor assembly, a plurality of fan blades, a motor assembly, and a plurality of cables. The outer ends of the cables are coupled to the outer ends of the fan blades, and the inner ends of the cables are coupled to the inner anchor assembly. The inner anchor assembly may further include a disc-shaped plate and a plurality of inner anchor members to which the cables may be coupled. The inner anchor members may include a rear anchor portion and fore anchor portion, and these anchor portions may be angularly offset. A plurality of winglets and/or outer anchor members may be coupled to the outer ends of the fan blades to which the outer ends of the cables may be coupled. The outer ends of the cables may further comprise swaged tips outboard of the winglets and/or outer anchor members. | 10-27-2011 |
20120177509 | CEILING FAN WITH CONCENTRIC STATIONARY TUBE AND POWER-DOWN FEATURES - A fan system comprises a hub, a plurality of fan blades, a drive system, and a stationary tube. The hub is configured to rotate. The fan blades are mounted to the hub. The drive system comprises a rotatable hollow output shaft. The hollow output shaft is in communication with the hub, such that the drive system is operable to rotate the hub via the hollow output shaft. The stationary tube is inserted through the hollow output shaft. The stationary tube is configured to remain stationary as the hollow output shaft rotates. Wires and the like may be passed through the stationary tube, to reach an accessory mounted at the bottom of the stationary tube. The fan system may also include a detector, such as a heat detector, a smoke detector, or an accelerometer. The detector may power down the fan system in response to detecting certain conditions. | 07-12-2012 |
20130189104 | FAN WITH RESILIENT HUB - A resilient hub assembly comprises a top plate, bottom plate, central hub, and outer spars. The central hub is coupled between the top plate and the bottom plate. The outer spars are coupled between the top plate and the bottom plate, and the outer spars are positioned in a circular arrangement about a common longitudinal axis of the top plate and the bottom plate. The resilient hub assembly is configured to be flexible. The top plate and/or the bottom plate may comprise cutouts, and/or the outer spars may be positioned as to allow a gap between the central hub and the outer spars to promote flexibility. | 07-25-2013 |
20140023507 | CEILING FAN SYSTEM WITH BRUSHLESS MOTOR - A fan system includes a motor, a rotatable hub, and a plurality of fan blades. The motor is coupled with the hub by a hollow drive shaft, such that the drive system of the fan system is gearless. The motor is controlled by a PFC-based control module, which is in communication with sensors that are configured to sense parameters associated with operation of the fan system. The control module is configured to react in certain ways to certain conditions detected by the sensors, such that the fan system uses feedback-based control algorithms. A remote control panel is in communication with the control module. The remote control panel is operable to display fault conditions detected by the sensors. Blade retainers prevent fan blades from falling when a fan blade breaks free from the hub. Pins prevent the hub from falling when the hub breaks free from the rotor. | 01-23-2014 |
20140072431 | Multi-Part Modular Airfoil Section and Method of Attachment Between Parts - A fan system includes a motor, a rotatable hub, and a plurality of fan blades. Each of the fan blades includes a substantially rigid spine member, a resilient leading edge member, and a resilient trailing edge member. The leading edge member and trailing edge members are removably coupled with the spine member, such that different leading edge members and different trailing edge members may be chosen to customize the leading and trailing edges of the fan blades. Each fan blade may have more than one type of leading edge member or more than one type of trailing edge member. The leading edge member and trailing edge member may each be coupled with the spine member by urging the leading edge member and trailing edge member in a direction that is substantially perpendicular to the longitudinal axis defined by the spine member. | 03-13-2014 |
20150023802 | Ceiling Fan with Variable Blade Pitch and Variable Speed Control - A fan comprises a hub, fan blades, and inserts. The hub comprises outwardly extending mounting tabs that lie along a common horizontal plane. The fan blades are hollow, such that each mounting tab is inserted in the hollow interior of a corresponding fan blade. Each insert is positioned in the hollow interior of each fan blade, between each mounting tab of the hub and the interior surface of the corresponding fan blade. Each insert is configured to position and maintain the chord line of each corresponding fan blade at an oblique angle relative to the horizontal plane of the hub. A kit may include several insert sets to choose from to provide adjustable angle of attack. A fan control system includes a dimmer switch and a control module, which allows the dimmer switch to be used to infinitely adjust the speed of a fan motor within a range. | 01-22-2015 |
20150037164 | AIRFOIL FOR FAN BLADE - A fan blade comprises an airfoil profile having a lower surface, an upper surface, a trailing edge, and a leading edge. The lower surface comprises a concave portion which is defined by a first ellipse. The upper surface comprises a convex portion which is defined by a second ellipse. The leading edge and the trailing edge are of a substantially convex shape and transition the concave shape of the lower surface to the convex shape of the upper surface. A maximum thickness of the airfoil profile is defined at a point along the airfoil profile proximal to the leading edge of the fan blade. A chord length is defined as a lineal distance between an outermost point of the leading edge and an outermost point of the trailing edge. The dimensions of the airfoil profile, including those of the first ellipse and second ellipse, are functions of the chord length. | 02-05-2015 |
20150078902 | FAN BLADE RETENTION SYSTEM - A fan comprises a rotatable hub assembly having an inner anchor assembly, a plurality of fan blades, a motor assembly, and a plurality of cables. The outer ends of the cables are coupled to the outer ends of the fan blades, and the inner ends of the cables are coupled to the inner anchor assembly. The inner anchor assembly may further include a disc-shaped plate and a plurality of inner anchor members to which the cables may be coupled. The inner anchor members may include a rear anchor portion and fore anchor portion, and these anchor portions may be angularly offset. A plurality of winglets and/or outer anchor members may be coupled to the outer ends of the fan blades to which the outer ends of the cables may be coupled. The outer ends of the cables may further comprise swaged tips outboard of the winglets and/or outer anchor members. | 03-19-2015 |