Abstract: A fan assembly and a method of assembling same according to which a mounting flange is provided on an arm to which a blade is connected and a slot is provided in a mounting ring. The flange extends in the slot, and a retainer engages the arm member. The retainer and the mounting ring are attached the end casing and a post is provided in the slot for extending in a bore formed in the flange.

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 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: The present invention is directed to the general field of ceiling fans and more particularly to the field of ceiling fans with easy install features. Such a fan includes an electrical quick connect device and an articulating fan blade assembly. The quick connect device includes a plug/receptacle configuration enabling the fan to easily connect to an electricity supply while providing the gravitational and rotational support required by the fan. The fan blade assembly includes a drive hub having a series of slots to receive the neck of a fan blade. The fan blade neck is secured in the slot in a fashion that allows for articulation of the blade relative to the fan or removal of the fan blade from the fan.

Abstract: A plastic product comprising an inner core portion made of plastic and having a solid shape or a hollow shape including an internal cavity, and a fiber-reinforced plastic layer formed on inner and/or outer surfaces of the inner core portion, whereby the plastic product has light weight, high strength and excellent vibration suppressing and noise shielding ability.

Abstract: The connecting device includes rotor and blade mounting segments each secured on a rotor and a fan blade at a respective connecting end thereof. A socket end of the rotor mounting segment extends in a radial direction relative to the rotor, and has an insert wall with an insert opening, an insert slot confined by upper and lower inner walls and extending in the radial direction from the insert opening, and an upper outer wall opposite to the upper inner wall. The upper outer wall has a recess communicated with the insert slot to form a retaining wall. A plug end of the blade mounting segment has a bottom wall to be fitted into the insert slot from the insert opening. A resilient retainer has a proximate end secured on the bottom wall, and a distal end with an engaging spring protrusion to provide a biasing force away from the bottom wall.

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: An interchangeable fan blade system for a ceiling fan, made up of a set of adapters having a plurality of elongated attachment apertures that allow the adapter to be threadably fitted to virtually any type of fan support arm, and a complimentary set of interchangeable fan blades. The adapters include one of a variety of connectors for attaching one end of the fan blades to the support arm. The one end of the fan blade is configured and adapted, or otherwise provided with mating connector elements adapted to engage the connectors of the adapters, thereby allowing the fan blades to be removably attached to the adapters. A second embodiment of the interchangeable fan blade system is a set of interchangeable fan blades having a plurality of elongated attachment apertures which allow the fan blades to be secured to virtually any type of fan arm, by threading a plurality of shoulder cap screws and a plurality of male-female connectors though the plurality of attachment apertures.

Abstract: An assembling device for the blade of the hanging fan which comprises a ring body arranged on the bottom of the motor unit and having a plurality of dovetail grooves on rim thereof, and blade base has corresponding dovetail shape such that the blade base can be inserted into the dovetail groove and the blades are fixed.

Abstract: The bolt-together wheel consists of a pair of side plates separated from one another by cylindrical spacers. The spacers are connected to the side plates by shearable bolts where the head of the bolt will shear off when a predetermined torque is applied thereto. The predetermined torque is selected such that the bolt head will shear after the bolt securely fixes the spacers to the side plates. As a result, the bolt does not extend from the side plate such that wear on the blast wheel is reduced. After the bolt head shears, it can be machined to provide a uniform, smooth surface that further minimizes wear. Finally, the edges of the side plates can be provided with tapered faces to reduce the impact force of rebounding shot and the wear resulting therefrom and to direct the rebounding shot away from the interior of the blast wheel.

Abstract: A fan for a vacuum cleaner has a fan housing, motor and impeller. The fan housing has an inlet and outlet. The impeller has a hub and multiple flexible blades. This flexible blade fan provides better air performance, less noise, better durability, and easier impeller installation than conventional vacuum cleaner fans.

Abstract: A vane suspension for angle adjustable mounting of a vane (6) in a hub (1), comprising a seat (3) in the hub and a mounting part on the vane (6). The mounting part on the vane comprises a stud (16) and a shoulder (17) provided at the end of the stud with a partly spherical contact surface (19) facing the blade (15) of the vane, and in that the seat (3) of the hub has a hub shoulder (10) with a partly cylindrical contact surface (12) radially facing the center of the hub (2), which two surfaces are arranged to cooperate mutually by linear contact, whereby the position of the line (21, 21') is constant irrespective of the angular position of the vane in relation to the hub.

Abstract: A variable pitch propeller has a two part hub assembly, each part of the hub has generally semi-cylindrical half sockets formed therein for receiving the cylindrical blade root shanks of individual fan blades. The sockets have enlarged portions, defining semi-annular shoulders, which receive an enlarged portion of the blade root shank so as to prevent axial movement of the fan blade. The half sockets of at least one part of the hub further have recessed portions for receiving locking insert members having a curved upper surface and a longitudinal keyway formed therein. A radially projecting key extends longitudinally along at least an a portion of the blade root shank and fits into the keyway formed in the locking insert member when the fan blade is placed into the half socket containing the locking insert member. The two parts of the hub assembly are coupled to clamp the fan blades within the aligned half sockets.

Abstract: A method and apparatus are provided for mounting fan blades to a ceiling fan with a mounting bracket and support arms which support each of the fan blades at two separate points. The mounting bracket is mounted to a motor for the ceiling fan and rotates in response to powering the motor. The fan blades are each secured to the mounting bracket at first points. The support arms have inward portions which are rigidly secured to the mounting bracket. The support arms extend from beneath the fan blades in a spaced apart relation with the fan blades. The support arms extend outward from a central axis for the ceiling fan to second support points on the lower sides of the ceiling fan blades. The second support points are disposed outward from the mounting brackets for reinforcing mounting of the fan blades to the motor.

Abstract: A fan impeller has a hub and fan blade units with fan blades connected to the hub. The fan blade units are made of plastic material reinforced with first fibers for transmitting forces acting on the fan blades into the hub. The first fibers extend substantially parallel to a longitudinal direction of the fan blades. The first fibers are bundled at a radially inner end of the fan blades to form a tubular structure. The tubular structure has a free end that is bent radially outwardly substantially about 180.degree. to form an end ring. The end ring has a convex surface facing the hub and a concave surface facing the fan blade. Each fan blade unit has a fastening element with an annular groove for receiving the end ring, the fastening element connected to the hub. Each fan blade unit further has a fastening ring inserted into the concave surface. The fastening ring clamps the end ring at the fastening element.

Abstract: A turbine blade having a preestablished rate of thermal expansion is attached to a turbine disc having a preestablished rate of thermal expansion being greater than the preestablished rate of thermal expansion of the turbine blade and forms a turbine assembly. The turbine blade has a root portion defining a pair of sides having a pair of grooves therein. The turbine assembly includes a pair of flanges between which the turbine blades are positioned. Each of the pair of flanges has a plurality of grooves defined therein. The grooves within the pair of flanges are aligned with the grooves in the blades and have a space formed therebetween. A plurality of spherical balls are positioned within the space. The plurality of spherical balls has a preestablished rate of thermal expansion being equal to the preestablished rate of thermal expansion of the turbine blade.

Abstract: A multi-layer disk fan with blades operates quietly. The multi-layer disk fan with blades is formed by laminating a multiplicity of annular disks in a measured spaced relation, the arrangement having such a feature that a multiplicity of blades are interposed between the annular disks and the ends of the respective blades. The blades are further positioned a circumferentially measured spaced apart distance inward of the outer peripheral edges of the annular disks. Turbulent air flow caused by peeling-off at the tips of the blades through the effect of laminar flow by the disks is effectively prevented. Likewise, distortion in outlet speed at the outer peripheral edges of the annular disks is controlled, reducing noises from turbulent flow and interference and resulting in quiet operation.

Abstract: A boat propeller wherein the blades are easily removable from the propeller hub on an individual basis to permit quick replacement for repair and/or for substituting blades of different pitch comprising a hub adapted to fit over and attach to a drive shaft; a plurality of removable blades positioned around said hub and extending radially therefrom, each of said blades comprising a water engaging blade portion and a rigid tang extending from the base and of such blade portion; a plurality of blade engaging sockets disposed on and around said hub, said sockets adapted to mate with and receive the tang of said blades; and preferably a cover plate adapted to fit over the portion of said tang within said socket, tang, cover plate each being provided with a plurality of aligned bolt holes; and a plurality of bolts extending through said aligned holes and holding each assembly thereof together. Further modifications include a blade assembly for use wherein less force will be exerted, e.g.

Abstract: An improved blade for a ceiling fan including a blade frame and a blade plate, wherein the blade frame is a hollow circular frame composed of a male member and a female member engaged therewith. The blade members are made from injection molded plastic, and secure a blade plate therebetween.

Abstract: A medallion-style blade iron assembly for use on a ceiling fan includes a vibration isolation system for eliminating transmission of vibration from the fan motor to the blades. The assembly includes an arm securable to the fan motor and medallion securable to the arm, with the distal end of a blade being secured therebetween. A plurality of mounting holes are provided in the blade for allowing screws to be inserted through the arm into the medallion, with each hole have a resilient elastomeric grommet disposed therein. Each grommet has a pair of annular shoulders resting on the top and bottom surfaces of the blade, and a central tapered opening for receiving the frusto-conical bosses formed on the arm and medallion. The grommets prevent contact between the blade, the arm, and the medallion.

Abstract: A propeller to be used in particular for sail boats comprises a hub (2) fitted to the end of a drive shaft (5) and carrying a bevel toothing (8) meshing with bevel pinions (9) provided at the ends of corresponding propeller blades (10) mounted in a rotatable manner about their own axes between two annular shell halves (11, 12) covering the hub (2); and an adjusting element (21) coupled through cylindrical mating toothings (19) to the inner shell half (12) and detachably fastened thereto, the adjusting element internally carrying a circular sector (24) to be engaged by a corresponding circular sector (23) projecting from the outer hub outline so as to determine the boundary orientation positions of the blades (10); the propeller pitch being adjustable by disengagement of the mating toothings (19) between the adjusting element (21) and shell half (12), rotation of the adjusting element through a given angle and further engagement between the mating toothings (19).

Abstract: A transverse fan assembly including a plurality of elongated fan blades arranged in a cylindrical array and a plurality of axially spaced and generally aligned discs of substantially uniform diameter. Each disc defines equidistantly spaced slots concentric with and inwardly of the disc periphery for allowing the blades to loosely pass therethrough. Each blade is individually attached to a disc by a blade retainer which, in response to an individual twisting action upon the blade, releasably and individually attaches the blade to the disc under a substantially constant and independent force in a manner allowing for removal or replacement of the blade without affecting other blades in the fan assembly.

Abstract: A blade support hub of hollow circular ring structure for an axial fan, constituted essentially of two opposing parts rigidly fixed together by bolts, the hollow circular ring structure being provided with circular cavities for inserting the fan blade shank, the bolts for joining together the two parts of the hub also serving for fixing all the blade shanks.

Abstract: An aeroplane propeller assembly comprising a pair of hub members made of nylon with glass fibers interspersed therein forming an undulant gripping surface for clamping the root ends of wooden propeller blades and embedding the raised areas of the hub surfaces into the wood to obtain a firm and shakeproof purchase thereon as the hub members are bolted to each other and to the blades. The hub members are in the form of discs and have root-end-confining pockets formed to clamp the end portions and hold them under compression tightly within the pockets, each pocket having sharp pins molded therein and strategically located not only to pierce into the wood but also to swell the wood and contour it against the enclosing surfaces of the pocket. The propeller blade root ends are adapted to be cut at different angles to obtain different pitch upon being fitted into the same pockets.

Abstract: A propeller includes a rotatable hub with a plurality of sockets, blades with roots that fit in the sockets and a plurality of pitch blocks which fit between the blade root and the socket walls. Hubs with two, three, and four sockets are shown. The blades have no twist and are formed of molded, glass reinforced nylon. The pitch blocks are also nylon and different pairs of pitch blocks may be used to hold the blades at different angles. All nylon components are designed to minimize stress concentrations. The hubs although also of nylon have steel reinforcing plates within them which take the centripetal forces. These forces are transmitted through bolts to passage walls in the pitch blocks, and from the pitch blocks through interengaging teeth to the blade roots. A snap on, snap off aerodynamic spinner is also provided.

Abstract: A fan wheel or pre-guide wheel for axial or semi-axial air flow, especially for use with the cooling systems of motor vehicles. In order to provide for advantageous stream line flow, the leading surfaces of the fan wheel hub or an upstream pre-guide wheel hub are suitably rounded providing for a generally increasing hub diameter in the direction of the air flow. In order to simplify the casting or extrusion of the fan wheel so configured, the invention provides for a substantially cylindrical or conically decreasing hub diameter in the region of the fan hub lying generally behind each fan blade. For fan hubs of relatively low axial depth, for example with riveted fan blades, the gaps may remain uncovered without detrimental effects on the air stream.

Abstract: A transverse flow fan rotor for the cleaning and separating system of a combine harvester and for other uses features a lightweight yet sturdy rotor structure which eliminates the need for machined shaft keyways, keys, set screws and pins for attaching rotor discs to a drive shaft. The discs are frictionally clamped to the shaft by the action of split tapered lock bushings and coacting opposing collars on opposite sides of each disc drawn together by bolts.

Abstract: A compressor rotor for a turbine comprises individual segments radially stressed by a bandage of fibre-reinforced material which is under prestress when the rotor is stationary. The bandage cross-section has regions of different stiffness and different tensile strength, constituted by retaining rings arranged one inside another or side-by-side.

Abstract: A separable blade agitator having the impeller blades joined to the drive shaft in an interference fit effected by a hub on one of the separable impellers which embraces both the shaft and the other impeller.

Abstract: A fan assembly including a hub portion from which blades and a stem are extended respectively radially outwardly and radially inwardly, the hub portion, the blades and the stem being formed of molded plastics and made integral with each other. The stem is connected to an output shaft of fluid coupling by means of bolts each of which passes through a bushing. The bushing having knurling portion at outer surface thereof is inserted in the hole of the stem and the periphery of the hole is melted by heating upon insertion of the bushing therein so as to ensure the connection of the fan assembly to the output member. In case that a spacer is interposed between the stem and a flange of the bush, the spacer is fixedly connected to the bushing.

Abstract: A longitudinal extruded aluminum fan blade having an integral elongated shank extending from one blade end is connected to a pair of elongated mounting members having abutting surface portions in general conformance with and generally coextensive of respective top and bottom surface portions of the shank and having tapered portions overlying blade regions adjoining the shank with the blade regions being free of any connections extending therethrough to inhibit fatigue failure of the blade. The mounting members and the shank define a stem portion having one or more circumferential grooves and the stem portion is adapted to be attached in various pitch positions to a rotor having a flat surface. A coupling device includes a mounting saddle having a flat side abutting the flat rotor surface and an opposite side provided with curved ribs received in portions of the grooves.

Abstract: A new and improved type of rotor blade assembly is disclosed for use in a power-generating, wind-driven turbine. The present invention comprises a plurality of support blocks each mounting a rotor blade and captivated between two rings so as to form a cylindrical rotor array with radially-extending blades.The present invention offers the dual advantages of reduced fabrication costs and increased ease of manufacture.

Abstract: Fan blade assembly and shaft mounting in which there is minimized axial face run out or wobble of the rotating fan by virtue of the fan taking a perpendicularity signal from a shaft mounted hub plate which divorces the squareness of the fan shaft opening from influencing the hub plate perpendicularity signal. The fan is mounted on the motor shaft by a nut and Belleville spring assembly to provide end play takeup by the load deflection characteristic of the Belleville spring.

Abstract: A structure for interlocking relatively thin sheet material with a relatively heavy member, such as, for example a hub member with a sheet metal fan blade structure and the like to provide a rigid durable interlocking connection therebetween, in which, in the example given, the hub member is provided with an annular sleeve which extends through a bore in the central portion of the fan blade or other member, the hub member having an upstanding flange in the form of an annular shoulder spaced rearwardly from the free end of the sleeve and of greater diameter than the latter, with the shoulder being radially spaced from the sleeve by a groove having a radial width approximately equal to the thickness of the sheet member.

Abstract: A fan blade is attached to the shaft of an induction motor by means of a spring clip seated in a groove in the shaft resiliently and frictionally clamping the fan blade against a flat surface of a member secured to the shaft, such as the rotor end ring, thereby providing a perpendicular relationship between the fan blade and shaft and, when the end ring is used, abstracting heat from the rotor.

Abstract: A two-bladed propeller fan for wind machines, having a teetering hub for mounting in spaced relationship on a driving shaft, a pair of tangs 180.degree.

Abstract: To improve the reliability of a fan blade to provide forced cooling to automotive-type alternators, while retaining the advantages of compact construction and inexpensive manufacture, a disk-shaped element is formed with a central opening to receive the shaft of the alternator having fan blades at the periphery thereof, and which further is so shaped and formed that the central region is axially (with respect to the shaft) offset from the major plane of the disk-shaped fan blade, clamping washers being placed against the offset region, one washer spanning the concave portion of the offset portion and the other washer fitting within the concave portion of the offset.

Abstract: A radiator cooling fan assembly is disclosed for use in trucks and other large vehicles. The heavy duty assembly includes a pair of hubs having radially extending arms with blades extending between aligned pairs of hub arms. The arms of one hub are substantially shorter than the arms of the other hub. In addition, the either hub may include either an enlarged aperture in its central portion or webbing between its arms or both.

Abstract: A fan blade and root assembly is disclosed for use in a hot gas engine requiring low weight and high efficiency. The root construction facilitates simple sheet metal stamping fabrication throughout the blade, root, and hub while permitting an air foil shape to be imported to the blade.

Abstract: The hub of an axial-flow fan is constituted by two shell members axially juxtaposed for driven rotation about a common first axis. Circumferentially distributed ribs project from each shell member toward ribs on the other shell member, each pair of ribs being formed with cylindrically arcuate, respective seating faces about a common second axis transverse to the first axis, the seating faces jointly receiving a conforming root portion of a blade whose wing portion projects radially beyond the hub. The shell members and root portions are releasably clamped to each other by a clamping bolt axially passing through aligned openings in the shell members, the ribs, and the root portions, one clamping bolt constituting the sole element securing each blade to the hub so that individual blades may be released by removing one bolt only.

Abstract: A helicopter cross beam rotor is shown including upper and low coaxial composite blade spars at right angles secured by tension bolts which pass through the composite spars and are held by threaded nuts to a rotor hub at the upper end of a rotor drive shaft. A metal cap plate above the upper spar and a spar-to-spar filler piece are also provided. Torque between the spars and the rotor hub is reacted by intermeshing ribs and grooves on the confronting faces of the hub, the filler piece and the cap plate. The bolt holes in the composite spars are oversize so that the bolts do not react torque between the rotor hub and the composite spars.

Abstract: A propeller fan comprising a pair of similar sheet metal spider-blade members each having a flat central hub section and two right angularly arranged pairs of narrow radially outwardly projecting spider arms. Each spider arm is twisted at an intermediate portion so that radially outer end portions of the arms of each pair are inclined in opposite directions relative to the hub section. A pair of air moving blades are formed integrally at inner end portions respectively with the outer end portions of the spider arms of one of the pairs of arms. A pair of laterally projecting blade support members are integrally formed respectively with the outer end portions of the other pair of spider arms. Each blade support member is approximately twice as wide as each spider arm and each blade is approximately four times as wide as each spider arm. The width and length of each blade are approximately equal.

Abstract: In the rotor of a windmill electric generator, blades are secured to a hub by means of individual tab-receiving slots and a common "knock-off" hubcap, this mounting means providing for rapid assembly and disassembly. The mounting structure itself establishes a predetermined pitch at the blade root, thus permitting the advantages of an optimum twisted blade to be obtained without the need for an excessively complex blade configuration. The result is a compact generator unit that can be used easily in remote areas and stowed with camping equipment.

Abstract: Disclosed is a hub assembly for resiliently mounting a driven element such as a fan, blower wheel or the like on a motor shaft. The body portion of the hub is particularly adapted to be formed by die casting and use of a simple, pressed-on fastener to clamp the resilient members, fan spider and hub body together results in a hub assembly requiring only a minimum of manufacturing and assembly operations.

Abstract: A fan comprises a flat disc sandwiched between two hub members, together with two or more blades, ech blade having a boss with a slit so that the boss straddles the peripheral portion of the disc and is gripped by the hub members. Fans can readily be assembled with any required number of blades and the blades can be set at any required angle by cutting the slits at the appropriate angle.