Abstract: A ceiling fan has a downrod assembly secured at an upper end to a ceiling bracket assembly and secured at a lower end to the motor shaft of a motor. An upper canopy is disposed at an upper end of the downrod assembly and a lower canopy is disposed at the lower end of the downrod assembly. A fan housing/blade mounting assembly secures fan blades to a motor body that rotates about the motor shaft, and a lower platter assembly is secured to a lower end of the motor shaft.

Abstract: 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 portion. The blades have an inner region which is not bonded to the spar, allowing an inner portion of the spar to twist during pitch changes. A counterweight is mounted to an arm extending from an inner end cuff of each blade. The counterweight is located out of the plane of rotation. The counterweight is also located on a side of a line opposite from the trailing edge, the line passing through the pivot axis perpendicular to the plane of rotation.

Abstract: A small size portable fan having a mechanism for adjusting the angle of a blower relatively to a body portion, and a mechanism for hanging the fan to a human body or other objects. The fan includes a body portion, and a blower pivotally mounted on the body portion for adjusting the relative blower angle. A cord can be attached to the fan for the hanging purpose. The connecting mechanism of the cord to the fan is in a detachable manner that when an outer force applying to the connectors exceeds a certain extent, the cord will be released from the fan, therefore prevents from harms to a wearer.

Abstract: A support spoke for a windmill for supporting blade rings of a windmill. The support spoke for a windmill includes an elongate rod with opposite first and second ends and a longitudinal axis extending between the ends. The first end is coupled to an outer ring of a fan portion of a windmill. The second end is adapted for threadable coupling to a hub of the fan portion of the windmill. An arm is rotatably coupled to the rod and is adapted for coupling to an inner ring of the fan portion of the windmill. A holding portion selectively prevents rotation of the arm about the rod to prevent loosening of the rod.

Abstract: A permanent magnetic dynamo comprises a wind gatherable stand having a tapered outer wall surface that extends from the lower end toward the upper end of the wind gatherable stand in order to guide wind upward; a roof supported through support shafts fixedly standing at the peripheral edge of the wind gatherable stand such that an open space is formed above the wind gatherable stand; a rotary shaft pivotably supported by the roof and the wind gatherable stand and having a horizonal drive blades located in the open space at upper end thereof; a permanent magnetic rotor disposed within the wind gatherable stand and fixed to the rotary shaft to rotate to a vertical axis together with the rotary shaft; stator windings disposed as to face annular permanent magnetic cylindrical portions which are connected to horizontal arm portions constituting the permanent magnetic rotor; and diamagnetic annular attachment plates fixedly provided within the wind gatherable stand, so that the permanent magnetic dynamo can efficie

Abstract: The present invention relates an electric fan. The fan has a body and a fan assembly housed in the body. The fan is able to pivot and elevate/descend with respect to the body. Furthermore, the body has a fragrance container received in a recess defined in the body, such that when the fan is activated, ambience will be full of delightful scent.

Abstract: A system for suspending a ceiling fan is provided which allows the ceiling fan to pivot, to accommodate vaulted or sloped ceilings, while preventing the ceiling fan from rotating about a longitudinal centerline axis of the fan. The system includes a hollow canopy defining an interior space and having an upper end portion, which is operatively attachable to a support structure such as the ceiling. The canopy further includes a lower end portion and a central, body portion extending between the upper and lower end portions. The canopy includes a seat which is connected to and extends upwardly from the lower end portion, and a guide which is also connected to the lower end portion and extends upwardly therefrom. The guide has an inner surface which forms a portion of the inner surface of the seat and defines a receptacle which extends through the seat and a bottom surface of the canopy. The seat defines an aperture which also extends through the bottom surface of the canopy.

Abstract: A coating (22) with a high coefficient of friction and low thermal conductivity covers a turbomachine low pressure shaft (12) in the vicinity (17) of a concentric high pressure shaft (11), in the area at which high friction contact between the two shafts could occur if a bearing (13) on the low pressure shaft (12) breaks following a failure causing the appearance of an out-of-balance mass. Friction would also more quickly equalize shaft speeds and reduce overheating in them.

Abstract: A necklace hanger for mounting on a portable fan to be worn is disclosed. The hanger includes a main body having a ring for fitly mounting on a fan and an extension for supporting the shroud of the fan. Then a cord is connected to the extension to form a loop for hanging the fan to one's neck. The hanger can selectively combine with the fan by user and is suitable for applying to other portable fans. Furthermore, the connecting mechanism of the cord and the main body is in a detachable manner that when an outer force applied to the connectors exceeds a certain extent, the cord will be released from the hanger to prevent from harms of a wearer.

Abstract: An improved windmill includes a conical rotor unit, a frame for supporting the conical rotor unit and a base for supporting the frame. The conical rotor unit has a conical rotor with a plurality of spaced curved blades disposed thereon and a plurality of spaced slant blades located at an outer rim of the conical rotor. The conical rotor has small wind resistance and may rotate under low speed wind to generate rotor rotation. The frame is rotationable about the base to enable the conical rotor to capture wind from different directions. The conical rotor is heavier than conventional windmill rotor and may serve as a fly wheel to store kinetic energy for the windmill to produce steady rotation under different wind speed for a long period of time.

Abstract: A flexible impeller has an insert design incorporating a threaded end within its insert that cooperates with a threaded removal tool for jacking the impeller from the shaft by rotation of the threaded removal tool.

Abstract: The invention provides a turbine blade retention device installed in an axially extending gap between the blade root bottom and the slot floor. The retention device has two parts: a blade root retention clip and a spacer bar. The clip has an elongated web of a selected web thickness and width less than the width of the slot floor. The clip includes a forward and a rearward transverse flange extending radially outwardly and extending laterally from forward and rearward ends of the web. The flanges serve to engage the forward and rearward faces of the rotor hub disk respectively, and to engage forward and rearward faces of an associated blade root. The height of at least one flange is less than the gap depth to permit conventional sliding installation the blade root. The spacer bar is installed in the gap between the clip and slot floor to hold the clip radially outward in engagement with the forward and rearward faces of the blade root.

Abstract: A suspension assembly for ceiling fans includes an upper supporting device securely attached to a ceiling, a suspension rod, and a motor casing. The upper supporting device includes a bowl-like upper retaining seat having a bowl-like spherical inner periphery and a through hole extending along a longitudinal axis thereof. A bowl-like upper suspension member is securely mounted to an upper end of the suspension rod and securely retained in the upper retaining seat. An inverted bowl-like lower suspension member is securely mounted to a lower end of the suspension rod. The motor casing includes an upper casing and a lower casing securely attached to the upper casing. The upper casing includes a lower retaining seat integrally formed on an upper part thereof. The lower retaining seat includes an opening in an upper end thereof for securely holding the lower suspension member. The lower retaining seat further includes a wave-like inner surface to retain the lower suspension member in place.

Abstract: A miniature fan for air freshener includes a freely rotatable fan seat, a bearing mounted at the center of the fan seat, a holder at the bottom of the fan seat, a container within the fan seat, a top cap mounted on the top of the container, a fastening nut and a fastening means mounted at the bottom of the holder, characterized in that the fan seat includes central slot, a circular conduit wall, a plurality of inner blades mounted in between the conduit wall and the central slot, and a plurality of rotatable outer blade mounted at the outer surrounding of the circular conduit wall, the bearing is mounted within the central slot and the bottom shaft of the container is pivotally inserted into the shaft hole of the bearing, the protruded top end of the holder is connected to the bottom shaft of the container and is combined together by means of the fastening nut, and a fragrance platelet is mounted within the container having a protruded shaft to adapt to the center hole of the fragrance platelet.

Abstract: A high velocity fan which includes a pre-assembled motor cover assembly, which contains a mounting plate, which is provided with locator studs to engage with a grill plate on a fan, and which motor mounting plate and grill plate are fastened together with a plurality of blind rivets.

Abstract: An improvement in the structure for mounting blades of a ceiling fan, characterized in that a motor comprises a bottom formed with a plurality of brackets each having a recess, the recess having an inner end which gradually decreases in size toward an outer end thereof, each of the blade having an inner end provided with a fixing member which extends outwardly and upwardly to form a tongue having an outer end which gradually increases in size toward an inner end of the tongue, the tongue being configured so that the outer end of the tongue has same size as the outer end of the recess while the inner end of the tongue has same size as the inner end of the recess thereby enabling the tongue 211 to fit into the recess from the inner end of the recess but not slide out of the outer end of the recess.

Abstract: A composite member has a diecast part and a hub part that consists of a harder material than the diecast part. The diecast part is attached to the hub part by diecasting within a diecast mold. The hub part has at least one end face. The at least one end face has an annular sealing projection that, during diecasting of the diecast part, rests at a surface of the diecast mold and is deformed by the diecast mold.

Abstract: A ceiling fan consists of a revolving motor having a plurality of fan blade mounts, a control device located under the revolving motor, a mounting piece located between the motor and the control device and provided with a plurality of first locating portions, a seat provided with a receiving space and a receiving port which is complementary to the mounting piece and provided with a plurality of second locating portions. The revolving motor is received in the receiving space. The seat is provided with a main lampshade and a plurality of auxiliary lamp seats.

Abstract: An improvement in the structure for mounting blades of a ceiling fan, characterized in that a motor comprising a bottom formed with a plurality of threaded holes, an annular ring-like mounting secured to the bottom of the electric motor by screws and provided with a plurality of brackets each having a groove which gradually decreases in size from an upper portion toward an lower portion thereof, each of the blades provided with a rod having a tongue which gradually decreases in size from an upper end to an lower end thereof, the tongue being configured so that the upper end of the tongue has same size of the upper portion of the groove while the lower end of the tongue has same size of the lower portion of the groove thereby enabling the tongue to fit into the groove but not slide out thereof.

Abstract: A key washer for interlocking a pair of concentric parts is described. The key washer is comprised of a flat, metal ring having an outer circumferential edge and an inner circumferential edge. Two or more formations are formed in the inner circumferential edge and adapted to be received on a mating formation of an inner one of the concentric parts. The outer circumferential edge has a plurality of straight flat sections for mating engagement with a corresponding configured surface of an outer one of the concentric parts. The metal ring prevents rotation between the concentric parts. The washer is utilized in a preferred application for interlocking an aircraft turbine engine high pressure rotor assembly and a tie shaft nut.

Abstract: A fan blade having a flow bumper curved backwards at a front side thereof, a mouth on the middle for gathering currents of air, a flow guide obliquely forwardly extending from the flow bumper at a top side above the mouth, and a rack and a mounting board vertically disposed at a rear side thereof for connection to a hub of a fan motor. The invention also provides a ceiling fan which has air guide means for guiding outside fresh air in for circulation upon operation of the ceiling fan.

Abstract: A semi-articulated stiff-in-plane (SASTIP) rotor hub is provided. The hub includes a cylindrical composite shell (12). A plurality of flexure mount assemblies (16) are positioned around the periphery of the hub shell. Each flexure mount assembly includes both an upper and a lower flexure (64), (66). The outboard ends of the upper and lower flexures attach to an outboard bearing support (34). The inboard end of each flexure is maintained within first and second clamp plates (76), (78) that are mounted within hub flexure openings (38), (40). The flexure clamp plates (76), (78) additionally attach circumferentially to annular CF rings (24), (26), (28), (30) positioned within the hub shell. A blade shaft (14) extends through the outboard bearing (72) and connects to a spindle. The spindle is supported by a spherical bearing that is mounted within the hub shell (12) at a circular spindle hole.

Abstract: An impeller has a plurality of rotating passageways which can be defined between adjacent blades, the blades having a curved root portion and able to pivot across a part spherical hub to maintain a fine line contact. The passageways have a convergence to improve the efficiency of the impeller. The hub can be split into two relatively rotating portions, with the blades attached to each portion to provide an efficient means to vary the pitch of the blades.

Abstract: An improvement in an electrical air pump having a housing with a pump mechanism at one end and an electric motor at the other end. The pump mechanism has at least one lightweight pump impeller made of plastic whose hub is press-fit on a shaft of the electric motor. The hub is provided with a plurality of grooves distributed around a bore in the hub which receives the motor shaft. The grooves form spaces between an inner surface of the hub and an outer surface of the shaft and the spaces are filled with an adhesive to bond the hub to the shaft. The grooves extend longitudinally or spirally along the entire length of the hub. The grooves are relatively shallow and have a depth of approximately 0.05 mm.

Abstract: A fan blade assembly includes a mounting arm with a mounting end formed with a plurality of engaging posts. A blade member has a plurality of mounting holes, each having a larger bore portion and a smaller notch portion divided by a constricted portion. A plurality of elastomeric coupling members are sleeved securely on the engaging posts, and have shanks, and radial outward peripheral flanges. Each coupling member is fitted snugly in the notch portion by passing the shank thereinto after the peripheral flange has been brought to pass through the bore portion to rest on one side of the blade member. A cap member has a plurality of engaging plugs. Each engaging plug is inserted into and is fitted snugly in the bore portion of the respective mounting hole in such a manner that a guiding portion thereof will gradually be brought to abut against the constricted portion.

Abstract: A multi-blade rotor arrangement free of flapping hinges, for a rotary wing aircraft, includes a rotor head plate (2) made of fiber-reinforced composite material. The head plate (2) includes a plurality of blade connection arms (4) that are elastically flexibly bendable in the blade flapping direction, and at least one plate segment (16, 18) that holds each blade connection arm on two sides thereof radially spaced away from the rotor center in a manner that allows elastic bending in the blade flapping direction. The plate segment is rigidly connected to the rotor mast (122, 222) at mounting locations (20) that are offset in the circumferential direction from the blade connection arms. In this manner, the elastically yielding flapping connection between the rotor blades and the rotor mast is provided by both the elastic bending of the blade connection arms and the elastic deformation of the plate segment portions between the blade connection arms and the mast mounting locations.

Abstract: A hanging bracket is initially secured to an electric outlet box. The hanging bracket includes on one of its ends, two canopy hooks with a screw hole located therebetween. The other end of the hanging bracket includes a single screw hole. A canopy includes two spaced slots shaped and located to receive the two canopy hooks of the hanging bracket. With the canopy hooks extending through the corresponding slots in the canopy, a fan assembly is pivotally mounted on the hanging bracket. It is then possible to connect the lead wires of the outlet box and the wires of the fan assembly. All that is then required is to pivot the canopy with the associated fan assembly about the canopy hooks into a vertical orientation. No additional lifting of the fan assembly independent of the fan assembly being supported by the hanging bracket is required. A single screw is inserted through the canopy into the screw hole in the hanging bracket at the end of the hanging bracket opposite to the end which includes the canopy hooks.

Abstract: A patio table and fan combination. The device uses a fan mounted on a pole that passes through the center of the patio table. The pole also supports an umbrella that can be used for shade when the table is located outside. The fan motor is mounted co-axially with the fan. The device includes pole mounted lights and a mist device. The patio table fan combination is powered by conventional household electrical outlet or by solar panels mounted on the patio umbrella. The central pole for the device comes in three pieces to facilitate shipping and assembly.

Abstract: An apparatus for detachable connection of a ceiling fan motor housing to a ceiling mounting assembly. The ceiling fan downrod provides a standardized elongated tube that is connectable to a multitude of ceiling fan housings and assemblies, and provides a universal ground wire connection through a plurality of holes for electrical grounding of the apparatus. The downrod is an elongated tube with a hollow center, having a plurality of pairs of holes near each end of the downrod. Each open end of the downrod has a plurality of threads on the exterior surface of each end, the threads providing one connecting method to attach one end of the downrod to a ceiling mounting assembly, and the second end of the downrod to a motor housing of the ceiling fan. The downrod provides numerous options for connecting the downrod to ceiling fan assemblies, and provides versatility for attachment of electrical ground wires through the plurality of holes in the downrod.

Abstract: A motor fan for a cleaning apparatus that creates the suction caused by a rotor in a suction device mounted in the cleaning apparatus such that foreign materials are drawn therein has a fan member coupled to the rotor and is provided with a plurality of curved fins thereon and which fins cause the air in a collection compartment to pass through a suction inlet by the suction when the rotor is rotated, and to discharge the sucked air outside a body through outlets and an exhaust outlet. A reinforcing member is provided and is closely engaged with a rear surface of the fan member, and which reinforcing member insertedly receives a shaft of the suction device and firmly is tightened by a nut.

Abstract: A suspension assembly includes an upper suspension subassembly with an upper end secured to a ceiling, a connecting device including an upper end having a spherical surface engagement relationship with a lower end of the upper suspension subassembly, and a lower suspension subassembly including an upper end having a spherical surface engagement relationship with a lower end of the connecting device and a lower end securely attached to a motor for driving a ceiling fan.

Abstract: A sleeve having a wear resistant surface is fitted over and secured to the outer surface of a hub for a bladed torque converter wheel. The sleeve may be secured by mechanical interference, bonding, or welding. The sleeve is adapted for use in transmissions for front-wheel drive and rear-wheel drive vehicles and is suitably formed for engagement with various drive connections.

Abstract: A cover for an aperture in a ceiling having a shell and a back panel. The shell includes: a wall; an interior portion; and an exterior portion. The interior portion has a tubular hub extending from the wall; fins extending from the wall and from the hub; and blocks extending from the wall. The hub has a central aperture and a distal end with a flange. The exterior portion has a recess cooperating with the hub on the interior portion. The back panel is nestable within the interior portion of the shell. The back panel has an aperture cooperating with the hub on the shell when the back panel nests within the interior portion of the shell. In such an arrangement, the back panel sits on upper surfaces of the fins and blocks. In order to attach to the ceiling, either the recess on the interior portion of the shell or the recess on the exterior portion of the shell is positioned between the mounting plate and the junction box.

Abstract: A portable fan device for use with a spray misting bottle which is capable of being mounted atop a spray applicating head portion of the misting bottle so that a fan blade unit of the fan device is positioned forwardly and in communication with an atomized spray nozzle of the spray head and cools and atomizes the mist spray issued by the nozzle. Releasable securing means such as an attachment bracket or contoured gripping tabs extending from the fan underside are employed for securing the fan body in a generally horizontal fashion atop the spray head. A stand member is held within a recessed cavity in the fan underside and can be rotated downwardly to support the fan device in an upright position for use as a portable fan once the fan body has been detached from atop the spray head. In a further embodiment, a gripping tab which forms part of the releasable securing means can provide the dual function of gripping part of the spray head and supporting the fan body in an upright position.

Abstract: Disclosed is a mechanism for the detachable attachment of a bladed wheel to a shaft of a turbomachine. The bladed wheel has a sleeve-like extension that faces the shaft. A fastening unit is arranged in the sleeve-like extension, the latter being circumscribed by a thicker wall bushing of a cylindrical recess of the shaft. A screw element is used as a locking element.

Abstract: A system and device for pumping molten metal that reduces bearing member fractures comprises a pump having a pump chamber including a first bearing surface, a rotor having a second bearing surface that aligns with the first bearing surface. The second bearing surface is formed by a plurality of spaced bearing pins attached to the rotor. Each bearing pin has an outer surface preferably substantially flush with the outer perimeter of the rotor. The pins are comprised of a heat resistent material that is harder than the material comprising the rotor.

Abstract: A ceiling fan blade attachment system for attaching a ceiling fan blade ring to a rotatable electric drive motor mounting surface. The blade ring and motor mounting surface include cooperating elements that enable the blade ring to be suspended adjacent to the motor mounting surface prior to fixed attachment of the blade ring to the motor mounting surface. The motor mounting surface includes a plurality of downwardly extending suspension posts. The blade ring includes a plate or bracket including keyhole shaped openings to receive the suspension posts and to enable rotation of the mounting ring so as to lock or suspend the blade mounting ring below the motor mounting surface in a provisional or temporary manner until the blade ring can be fixedly attached to the mounting surface.

Abstract: A spacing apparatus for use in mounting an engine cooling fan of a racing vehicle to a drive structure, typically the water pump drive shaft, is made from a spacer body to which a fan hub quick-releasably attaches. The spacer body has a base with a shaft extending therefrom having a reduced perimeter section over which the fan hub mounts. When the fan hub is in place, engagement rods may be inserted in the fan hub to retain the fan hub on the shaft. The engagement rods may be easily and quickly removed without risk of burn to the mechanic to allow quick release of the fan hub on which the fan blades are mounted.

Abstract: A ceiling fan housing includes a cylindrical member of transparent material and a decorating material layer applied onto the inner peripheral portion of the cylindrical member for decorating purposes. A number of panels are received in the cylindrical member and a number of fastening members engage through the panels and the bottom plate for securing the bottom plate and the cylindrical member and the panels together. The decorating material layer is formed a sand blasting process and includes a number of blank portions for engaging the panels.

Abstract: A blower wheel assembly and method is characterized by a steel hub with protruding lugs that mate with a corresponding array of holes in a backplate of the assembly. The lugs are riveted or otherwise deformed to upset the lug material, thereby permanently and securely attaching the hub to the backplate. The lugs are formed on the hub by a cold heading process whereby the hub is forcefully impacted by a heading punch or die which has recesses in it corresponding to the shape and configuration of the lugs. The impact causes the hub to deform, with the steel flowing into the recesses of the die, thus forming the lugs.

Abstract: A plastic fan is composed of a plastic-made fan portion and a metal-made insert portion integrally embedded in the plastic-made fan portion. The fan portion is formed of fan blades and a fan boss. The insert portion is formed of a ring-shaped flat base portion and a bent portion extending upright from an outer peripheral edge of the base portion and having a substantially ring-shaped configuration in plan and a flattened U-shaped configuration in cross-section. The insert portion defines lock holes arranged at predetermined intervals in an outer peripheral portion of the metal-made insert portion and extending through the metal-made insert portion from an outer side thereof to an inner side thereof. The inner peripheral edge portion of each of the lock holes is formed of a smooth flat surface on at least one of the outer side and the inner side of the metal-made insert portion.

Abstract: A swashplate is provided for use in helicopters having a vertical main rotor axis. The swashplate includes a bearing, a first race member including a channel, a second race member including a channel, and a third race member including a channel. The channels of the first, second, and third race members cooperate to form a bearing-receiving slot. The bearing is positioned to lie in the bearing-receiving slot. The first and second race members are adjustably coupled to change the respective positions of their channels.

Abstract: The centrifugal pump includes a separable, multipartite impeller assembly and preferably incorporates a shock-absorbent shaft support that is tolerant of impeller vibrations or minor imbalances in the impeller assembly. The multipartite impeller assembly comprises an impeller portion, a wet-end magnetic coupler, and a radial bearing. The impeller portion and the wet-end magnetic coupler are secured together by a snap-fit joint, which is reinforced by a radial bearing adjacent to the snap-fit joint. The shaft support has an encapsulation junction which secures braces to a peripheral base.

Abstract: A cooling fan assembly (13) is attached to a motor (11) by a mating, "twist-lock" adaptor plate (30) having radial lugs (33), which engage a shouldered recess (23) in a corresponding hub (22A).

Abstract: A fan assembly includes a circular first array of first fan blades; a first primary ring member supportively connecting inner extremities of the first blades about a fan axis, respective end extremities of at least a majority of the first blades defining inside and outside diameters of the array, the first blades being oriented for producing a primary axial fluid flow between the inside and outside diameters in response to rotation of the first ring member, the first ring member extending between the inside and outside diameters. A second primary ring member connects outer extremities of the first blades, the first blades in combination with the first ring member defining a generally circular opening about the fan axis.

Abstract: A suspension assembly includes an upper supporting member securely attached to a ceiling, a suspension rod, and a connecting member. The upper supporting member includes a bowl-like section defined in a lower portion thereof. The bowl-like section includes a first through hole defined in a bottom thereof, and a bowl-like upper suspension member is securely retained in the bowl-like section. A suspension rod includes an upper end which extends through the first through hole and securely attached to the upper suspension member. A suspension seat is securely mounted to the suspension rod and includes an inverted bowl-like seat which has a second through hole extending along a longitudinal axis thereof. An inverted bowl-like lower suspension member is securely received in the bowl-like seat, and the lower end of the suspension rod extends through the second through hole and securely attached to the lower suspension member.

Abstract: A ceiling fan housing includes a cylindrical member having an upper and outer peripheral flange and a cover having a lower and outer peripheral flange. A disc includes an upper and a lower surfaces each having a peripheral groove for engaging with the peripheral flanges of the cylindrical member and the cover. The disc is made of shock absorbing material for absorbing shocks and vibrations that may be generated in the ceiling fan. The disc includes two or more curved members secured together by ribs and slots so as to form the disc.

Abstract: An outer casing is mounted around a suspension rod and includes a number of sections each having a first teeth structure defined in a first side thereof and a second teeth structure defined in a second side thereof and having a curvature complimentary to that of the first teeth structure. The sections are assembled to form the outer casing due to engagements between the first teeth structures and the second teeth structures.

Abstract: A fan blade assembly having a plurality of arranged about a central hub having an axis of rotation, the blades projecting from the hub radially outward from the axis of rotation. Each blade has a blade length, with a proximal end attached to the central hub and a distal end radially outward from the central hub. The assembly has at least one vane member with a plurality of vane segments, each vane segment joining a first blade with an adjacent second blade at a place along the blade length located radially inward from the distal end and radially outward from the proximal end of the blades. The assembly further having a plurality of recesses in the central hub adapted to receive the proximal end of blades of an adjacent blade assembly to permit stacking of like assemblies.

Abstract: Disclosed is a new pole mounted revolving air circulating fan for inducing air movement within an air mass by use of a rotating impeller which simultaneously revolves around a vertical axis. The pole mounted revolving air circulating fan comprises a telescoping support pole extending substantially vertically upwardly from a mounting floor surface to a mounting ceiling surface, the ends of the support pole frictionally engaging the mounting surfaces. A fan, comprising a rotary air impeller coupled to an electric motor through a drive shaft, is revolvedly mounted on the vertical support pole. A generally cylindrical motor housing encloses the motor and the motor power supply leads. A blade guard, constructed of wire rods forming a substantially annularly shaped wire cage, encloses the impeller to prevent injury from contact therewith. The guard has a central hole through the back wherethrough the front end of the motor housing extends.