Abstract: A propeller with pivoting blades is provided as a cleaning tool (1) for the work area of metal cutting machines, where the angle of adjustment for the pivoting blades is such that an air jet is generated supporting the propeller blades (15) in folding open. The propeller blade (15) is arranged in a tool changer stacker instead of a common tool or on a tool spindle and serves to automatically clean the work area by a blowing process.

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 turbine 400 has a central duct 410 which accelerates fluid passing through it and a blade configuration which retards the flow of fluid near the tips of the turbine. This structure results in a vortex having a higher fluid pressure behind the tips of the turbine blades 408 and a lower fluid pressure behind the duct. In the present invention, this vortex is enhanced by (1) an increased acceleration of the fluid passing through the duct 410 and a deceleration of the fluid passing through the blades 408; and/or (2) by a fluid redirection device 850 for directing the fluid passing through the duct towards the outer diameter of the turbine.

Abstract: A ceiling fan includes an outer housing and a cap secured on top of the outer housing. A motor is disposed in the outer housing for driving a number of fan blades. An inner housing is rotatably disposed in the outer housing and is coupled to the motor by a gear transmission mechanism for allowing the inner housing to be rotated by the motor. An additional motor may be secured on the outer housing and coupled to the inner housing for rotating the inner housing. One or more light bulbs may be disposed in the inner housing for lighting the pattern on the inner housing.

Abstract: A ceiling fan includes an outer housing and a cap secured on top of the outer housing. A shaft is secured to the cap and a motor is disposed in the outer housing and secured to the shaft for driving a number of fan blades. An inner housing is rotatably disposed in the outer housing and includes a center sleeve rotatably engaged on the shaft for allowing the inner housing to be rotated about the shaft and includes a number of blade members. The fan blades may generate a circulating wind through the inner housing in order to actuate the blade members.

Abstract: A ceiling fan housing includes a cylindrical member having a bottom portion and having a cover engaged on the upper portion. A frame includes a number of panels each having an upper ear extended radially inward for engaging with the cover and each having a bottom extension extended radially inward for engaging with the bottom portion of the cylindrical member and for allowing the panels to secure the cylindrical member and the cover together. The frame includes a bottom ring, the extensions of the panels are extended radially outward from the ring.

Abstract: A ceiling fan housing includes a cylindrical member having a number of openings and includes a bottom portion having a number of punctures. A number of panels are secured to the cylindrical member and the bottom portion and engaged in the openings 8 the cylindrical member and in the of the bottom portion punctures. The panels each include a plate engaged in the openings of the cylindrical member or the bottom portion flush with its associated outer peripheral surface of the ceiling fan housing. The panels include beautiful colors and are directly secured to the ceiling fan housing for reducing the cost and for simplifying and accelerating the manufacturing processes.

Abstract: A ceiling fan motor housing assembly including a cup-like motor holder frame having an open top, a top cover shell covered on the cup-like motor holder frame over its open top, the top cover having a downward flange around the border fitted into the cup-like motor holder frame, and a bottom cover shell fastened to the cup-like motor holder frame and the top cover by screws and covered around the cup-like motor holder frame, having a plurality of ornaments on the outside.

Abstract: A housing for a ceiling fan includes a cylindrical member having a number of recesses formed on the outer peripheral surface for printing patterns. A cap is engaged on the cylindrical member and has a number of depressions formed in the upper surface for printing patterns. A number of panels are secured to the cap and to the cylindrical member, and may be formed with spatial patterns. The panels may be easily attached to the cylindrical member and the cap such that the patterns may be easily changed.

Abstract: An impeller for a fluid meter, the impeller comprising a bearing including a central recess suitable for receiving a pivot, and including at the periphery of the central recess, open-ended fluting with adjacent flutes being separated by ribs. Axial passages are distributed around the fluting, with each passage co-operating with at least one flute in such a manner as to facilitate a flow of fluid via the passage to the detriment of a flow of the fluid along the flute. The impeller is applicable to metering fluids loaded with particles in suspension.

Abstract: A marine propeller using the circulation control principle of blowing tantially over a Coanda surface at the trailing edge of each blade to develop high blade lift (thrust). Each blade has internal chambers and two blowing slots so that blowing is controllable for forward and for reverse thrust without reversing rotational direction of the propeller. This propeller is capable of generating much greater thrust and ship speed at lower RPM and noise levels than conventional propellers.

Abstract: A housing for act ceiling fan includes a cylindrical member and a bottom plate each having a number of openings for engaging with a number of frames. The frames each includes an inner peripheral channel for engaging with a number of panels. The panels can be easily formed with various kinds of colors and patterns for decoration purposes, and can be easily changed for changing different patterns.

Abstract: A housing for a ceiling fan includes a cylindrical member and a bottom plate. A cap is engaged on the cylindrical member. A frame includes a ring element and a number of extensions radially extended outward from the ring element for engaging with the bottom plate. A number of bolts couple the bottom plate, the cap and the frame together. Panels having two flanges engaged with the cap and extensions are secured by the bolts to the outside of the cylindrical member. The extensions and the panels can be easily formed with different patterns for decoration purposes and can be easily replaced with extensions and panels of different patterns.

Abstract: An axial blower has a blower motor and a blower wheel. The blower motor includes a motor shaft; a motor housing; a front and a rear bearing cover attached to the motor housing; ventilating openings provided in the front bearing cover; and air outlet openings provided in the rear bearing cover. The blower wheel includes a hollow hub surrounding the rear side of the motor housing; a plurality of impellers affixed to the exterior of the hub and projecting therefrom; a plurality of vane-like ribs carried by the hub at the interior thereof for generating a cooling air stream flowing between the hub and the motor housing; a bell-shaped part forming an axial continuation of the hub and surrounding the front side of the motor housing, a bottom portion, a central opening in the bottom portion and a plurality of ventilating openings provided in the bottom portion. The ventilating openings are arranged in a circular array concentrically with the central opening.

Abstract: A jet propulsion engine submergible in water for driving a water craft wherein a drive shaft is connected to an internal combustion engine for rotation thereof. A first turbine is mounted on the drive shaft for rotation therewith for providing a first high velocity stream of water axially through the propulsion engine. A propeller is journalled on the drive shaft adjacent to and downstream of the first turbine for rotation independently of the drive shaft. A second turbine is mounted on the drive shaft adjacent to and downstream of the propeller for rotation therewith for generating a second high velocity stream of water axially through the propulsion engine. The speed of the propulsion engine increases through the effects of the first and second high velocity streams of water for driving the water craft while the propeller becomes less effective until it is rendered free wheeling at cruising speeds of the water craft.

Abstract: A pusher turboprop engine is provided with an interior exhaust duct structure which directs the hot turbine gasses through and out of the engine nacelle to an annular duct mounted on the rear spinner which surrounds the propeller hub. The rotating annular duct includes blade-shaped shields which protect the roots of the propeller blades from the hot exhaust gasses and also pulls warmed cooling air through the engine nacelle thereby providing a rearwardly directed jet thrust to augment the propeller thrust.

Abstract: A dynamoelectric machine has a housing and a rotor assembly including a rotatable non-stepped shaft which projects through an opening in an end wall of the housing. A fan moves air through the machine to ventilate it and keep it cool. The fan is secured to an end of the shaft extending through the opening by a tab fitting in a groove formed in the shaft and a retention ring fitting over a hub portion of the fan in which the tab is formed.

Abstract: An outer casing assembly for ceiling-fan motors includes an upper cover with a top surface and a downward-curving flange, having a central opening in the top surface and a plurality of bolt holes in the periphery of the downward-curving flange; a middle guard shell formed in a hollow body structure with an external circumference corresponding to the inner periphery of the downward-curving flange of the upper cover; and a lower cover with a bottom surface and an upward-curving flange corresponding to the structure of the upper cover, having a lower central opening in the bottom surface and a plurality of bolt holes in the periphery of the upward-curving flange. The upper cover, the middle guard shell and the lower cover are all made of mesh material, wherein the middle guard shell is vertically positioned between the upper cover and the lower cover both of which are connected together by screw bolts through the bolt holes of both the upper and lower covers.

Abstract: The invention provides an armature rotor for electromagnetic retarder, comprising at least one disc (2) extended axially on one of its faces by a plurality of fins (9), each fin being defined by two parallel or substantially parallel faces slanted with respect to the corresponding radii, the tips of the fins being connected together by an annular flange (11) and the assembly formed by the disc, the fins and the flange being made as a single moulded block from ferromagnetic material. The fins (9) of said rotor are particularly thin, numerous and so close together, the thickness of each fin being less than 5 mm and the width of the gap between two consecutive fins, in its narrowest zone, considered perpendicularly to the facing faces of the fins, being less than 10 mm.

Abstract: A fan (10) adapted to be driven by an electrical motor (12), the motor of the type having openings (14) to permit the flow of air therethrough to cool internal components of the motor. The fan comprising a cup-shaped hub (20) adapted to be driven by the motor and including a plurality of arcuately shaped webs (44, 70) for inducing the flow through the motor and through a plurality of openings (40) formed in a axially extending wall (28) of the hub (20).

Abstract: A fluid powered electrical generator having an impellor-rotor rotatively mounted on a central support structure. A toroidal outer support structure surrounds the impellor-rotor, with the impellor-rotor including a plurality of circumferentially spaced-apart fluid dynamic blades. The outward ends of the blades are connected together by a rotor rings which is coaxial with respect to the outer support structure. The central support structure is supported within the outer support structure by stanchions or the like so as to permit a fluid stream to flow therebetween past the fluid dynamic blades. A peripheral electrical generator having a rotor element secured to the rotor ring and a stator element secured to the outer support structure produces electrical energy as the impellor-rotor is driven by the fluid stream.

Abstract: An improved electric motor ventilation structure including a "pull through" fan associated with a motor endshield including a shaft for supporting a fan on one end thereof, and defining a preselectively spaced and contoured air inlet and air circulating chamber adjacent the stator and rotor assembly of the electric motor to cause the circulating air to break the "hot" boundary layer of air immediately adjacent the motor windings.

Abstract: Ventilation apparatus for creating a fluid flow through the interhub spacing between the hubs of adjacent turbine wheels which are not integral with the rotor of the turbine includes an outward radial extension of the hub of the downstream wheel and/or a roundoff of the hub of the upstream wheel and/or a displacement of the axis of the hub of the upstream wheel from the axis of the hub of the downstream wheel for increasing the static pressure over a first predetermined arcuate portion of the interhub spacing in an ancillary fluid flow between the hubs and a seal circumferentially surrounding the hubs.

Abstract: A fan motor having a fan frame, a portion of which is formed by the extension of a motor base member on which a rotor axis bearing, a stator, a cup-shaped housing and another fan frame portion are mounted and a fan fixed on the rotor axis and incorporated in a space formed by both fan frame portions.

Abstract: An adjustable-pitch axial fan wheel. A hub has an outer surface forming a portion of a sphere. A plurality of blades are attached to the hub, each blade having a substantial flange at the base portion, the inner surface of the flange being spherical to match the surface of the hub. A central strengthening bolt extends through the blade and projects into the hub to form a pivot axis for the blade. Arcuate holes are formed in the flange, the arcuate holes being alignable with bolt holes in the hub to bolt the flange to the hub while permitting blade pitch adjustment within about 28.degree. of rotation of each blade with respect to the hub.

Abstract: An axial flow energy converter combining a tubular shroud defining a fluid pathway coaxial with the shroud, a rotational energy converter having a rotatable shaft mounted within the fluid pathway coaxial with the shroud, an impeller mounted to the shaft with the impeller having a hub having a face across the fluid pathway and having an edge at the radial perimeter of the hub and having a plurality of blades mounted radially to the edge of the hub and a set of guide vanes disposed axially with respect to the impeller and mounted within the fluid pathway. The hub has at least one face orifice in the face of the hub communicating with at least one edge orifice in the edge of the hub allowing fluid to flow through the hub, providing both axial fluid flow and hub fluid flow through the energy converter.

Abstract: An upwardly opening generally cylindrical decorative cover including a bottom wall having a central opening formed therein is provided and the cover is upwardly displaceable over the lower portion of a dependingly supported ceiling fan motor controlling switch housing with the central opening in the bottom wall of the cover snugly receive all but the upper portion of the switch housing therethrough and the inner periphery of the bottom wall disposed about the central opening abutted against a mounting flange structure carried by an upper portion of the switch housing and removably anchored thereagainst. The upper open portion of the cover is loosely telescoped upwardly over those portions of the ceiling fan motor projecting below the blades of the ceiling fan and disposed between the blades and the dependingly supported switch housing. The bottom wall of the cover may include openings therethrough for the passage of motor cooling air therethrough.

Abstract: An apparatus (10) for cooling a ceiling mounted room fan motor (11) having a rotatable shaft (24) and a motor housing (12) includes a flywheel (13) supported upon and rotating with the shaft (24) and a fan assembly (14). Motor housing (12) has a cylindrical side (15) and substantially circular end plates (18, 19) which together completely seal all windings of fan motor (11) therewithin and preclude entry of and contamination by environmental particulate pollutants. Fan assembly (14), similar to that of a squirrel cage fan, is substantially cylindrical, surrounds motor housing (12), and is operatively connected with flywheel (13) to rotate with the shaft (24), all energy for operation of fan assembly (14) being provided by fan motor (11).

Abstract: The fan rotor has an axial passage for a stationary shaft, one end of which is secured to the housing. The other end is covered by a plug for sealing-off the axial passage near the impeller hub. An external cover-plate of heat-conducting material is placed over the plug and applied in good thermal contact with the annular end portion of the rotor which is associated with the impeller.

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 hub is provided defining an axis of intended rotation to be disposed generally parallel to the direction of wind movement and the hub is hollow and include opposite ends spaced along the aforementioned axis. One end of the hub is closed and the other end is open to receive therein the wind incident upon the hub. The hub includes a plurality of elongated hollow propeller blades supported therefrom including root and tip ends as well as leading and trailing edges. The blades have their root ends supported from the hub at points spaced thereabout with the root ends opening into the interior of the hub inwardly of the open end thereof and the tip ends of the blades extending outwardly from the hub.

Abstract: A fluid coupling device and fan mounting arrangement is disclosed. The fan is of the type having a hub portion and a plurality of fan blades integrally molded therewith from a plastic material and an annular spider having its outer periphery attached to the hub portion and a plurality of inwardly extending tabs bolted to bolt bosses projecting forwardly from the front surface of the output coupling member. The bolt bosses define a bolt circle having a radius R.sub.1 and the output coupling member includes a plurality of pilot portions defining a pilot diameter of radius R.sub.2, wherein R.sub.2 is greater than R.sub.1. The annular spider includes a plurality of inwardly extending pilot tabs, each of which engages the outer periphery of one of the pilot portions of the output member.

Abstract: A plastic fan configured for attachment to a fan drive in a manner in which cooling air will be promoted to flow from the rear of the fan drive across the rear fins of the fan drive and through the blades of the fan. The flow of air across the rear fins increases heat dissipation from the fan drive. The fan has a plurality of radially extending circumferentially spaced blades secured to an axially extending hub portion. The hub portion is configured to be radially spaced from the fan drive to define an annular passage. Further, the front edge of the hub portion is spaced rearwardly from the forward portion of the rear fins of the fan drive to define a slot for cooling air to flow substantially unrestricted through the annular passage and to the blades of the fan.

Abstract: A fan construction of the type having a hoop configured hub provided with fan blades. The hub has apertures adjacent the blade roots. A viscous drive carries the hub. Rotation of the fan causes a pressure differential between the two ends of each hub aperture thus forcing an airflow radially outward to assist in cooling the viscous drive.

Abstract: A rotary electric machine comprising a housing containing therein several parts which are to be heated during operation of the machine, and a centrifugal cooling fan for producing an air circulation through the housing so as to cool the heated parts. The cooling fan is made of a disc-shaped metal plate having on its periphery a plurality of fan blades each formed by bending a radially outer portion of the metal plate upstandingly with respect to the surface thereof, and a plurality of notches each defined between the adjacent fan blades. A backing disc-plate is disposed at the back side of the cooling fan in a manner to block therewith the notches, thereby preventing an air from passing through the notches in an opposite direction from an ordinary air flow passing through the housing. The disc-plate and the cooling fan are disposed to define a small clearance therebetween for preventing rattling noises from being produced during rotation of the cooling fan due to an occasional vibratory contact therebetween.

Abstract: A ceiling fan comprises a cover provided with a rotor and wings, a stator, a fixed shaft attached to the stator and a member mounted on the fixed shaft and functioning as a protection member and/or fitting member. Thereby the fan is under protection, and parts of the fan and other equipments are easily fitted thereto.

Abstract: In a fan with a fluid friction clutch wherein the housing of the clutch is connected with the fan or has fan blades attached thereto and wherein the surface of the clutch housing facing the air intake opening of the fan is provided with cooling ribs to carry off slippage heat, the improvement comprises flow direction means for reducing the effects of the secondary air flow around the clutch housing. The flow directing means comprise either the cooling ribs on the surface of the clutch housing facing the air intake opening of the fan which ribs are curved at the outer edges thereof in a direction reverse to that of the rotation of the fan; cooling ribs of construction angled in reverse direction to that of the direction of rotation of the fan; annular cooling ribs; or cooling ribs of conventional radial arrangement covered by a flow directing intake housing.