Abstract: In a V-belt type transmission having a V-belt entrained on a pulley, the pulley includes a fixed pulley half fixed to an end portion of a crankshaft and a movable pulley half supported on the crankshaft but axially slidable in opposition to the fixed pulley half. The fixed pulley half is secured with a bolt that is threaded and engaged with a female screw formed inside an end portion of the crankshaft. The V-belt type transmission is capable of securely clamping a fixed pulley half and is capable of preventing the entry of dust and water into a fixed pulley half threaded portion formed in an end portion of the crankshaft. This arrangement protects against the formation of rust and corrosion.

Abstract: A fan-flywheel-pulley assembly for use in conjunction with an electric motor. The assembly may include a pulley positioned about a central axis. The assembly may also include a flywheel coupled to the pulley and positioned about the central axis, the flywheel including an outer circumferential flywheel surface partially forming a plurality of circumferentially spaced openings. The flywheel may also include a baffle that extends circumferentially in close proximity to a cylindrical wall unit of the motor from an inner diameter to an outer diameter to limit a gap between the baffle and the cylindrical wall unit. Further, the assembly may also include a radial fan disposed within the flywheel including a plurality of blades extending at least from the flywheel inner diameter to the outer diameter each opening is positioned between each adjacent fan blade. The pulley, the flywheel, and the radial fan may be integrally formed.

Abstract: A chain link with bushing in a drive chain where the bushing comprises at least one drain bole for draining liquid inappropriately collected in the bushing. In a further development of the invention, especially in connection with conveyor chains, the bushing comprises a bushing insert with contact surface for the chain pin, where the bushing insert is provided with drain holes. The invention is preferably used in connection with conveyor chains, in particular by the production of foodstuffs by freezing temperature.

Abstract: A method is provided for facilitating the cooling of engine coolant flowing through a radiator operatively connected to the engine. The method includes the steps of monitoring the temperature of the engine coolant flowing through the radiator and positioning a fan adjacent the radiator. The fan is initially rotated at a predetermined speed. Thereafter, the speed of the fan is varied in response to the temperature of the engine coolant.

Abstract: A centrifugal supercharger is disclosed that includes an internal drive mechanism which embodies the present invention. A pair of sprockets are connected to parallel input and output drive shafts and drivingly connected by a taut, high tension, endless cog-belt seated and running on the two sprockets. A plurality of belt stabilizing components are incorporated therein to provide maintenance-free, low-temperature operation of the drive mechanism. These stabilizing components include air ducts formed in the output sprocket, tensioning members formed in the belt, heat-resistant and high-speed ceramic ball bearings and shock absorbing springs that alone and in combination provide a highly efficient drive mechanism.

Abstract: A cooling system for a vehicle power unit has a cooling fan rotated by the rotational force from the crankshaft, in the housing thereof so as to cool the internal space of the housing by introducing air into the housing and discharging the thus introduced air to the outside through upper and lower outlet ports. The upper side outlet port is formed in the housing upper surface opposing the approximate middle portion of the V-belt's return path along which the V-belt moves from the rear to the front so as to promote the current of air introduced in the housing to flow along the direction of travel of the V-belt.

Abstract: A continuously variable transmission (CVT) having air cooling channels built into the outer face of at least one, and preferably more than one, of the sheaves of the clutches. The CVT is comprised of a drive clutch having an input shaft, a driven clutch having an output shaft, and an endless belt disposed about the drive and driven clutches. Each clutch includes an axially stationary sheave and an axially moveable sheave. Each sheave includes a sheave body with an inner, belt-engaging face and an outer face. At least one of the sheaves on one of the clutches has a plurality of generally radially oriented fins extending axially from the outer face of the sheave body. The sheave further includes an outer plate defining with the fins and the outer face of the sheave body a plurality of generally radially oriented air cooling channels.

Abstract: A drive power transmission apparatus having an elastically deformable unit formed by combining at least one torque limiting coil spring arranged between a first rotating unit which includes a hub-like plate attached to a drive shaft supported for rotation on a housing of a rotation-receiving unit such as a compressor and a second rotating unit which includes a pulley element driven by a drive power source and supported for rotation on the housing of the rotation-receiving unit via an angular-contact bearing. The elastically deformable unit of the apparatus normally provides an operative interconnection between the first and second rotating units to transmit a drive power from the drive power source to the rotation receiving unit, but disengages one from the other when a load torque produced by the rotation-receiving unit exceeds a predetermined limiting torque in order to interrupt the transmission of the load torque from the rotation-receiving unit to the drive power source.

Abstract: A cooling structure of a belt transmission for vehicles which limits the consumed power for cooling to a minimum and does not deteriorate cooling performance of the transmission. A drive pulley having a variable pitch diameter and a driven pulley which is driven through a drive belt and has a variable pitch diameter is housed in a substantially elliptical housing. An intake port formed in the vicinity of a suction part of the cooling fan formed on the drive pulley in the housing to forcedly introduce air from the outside and exhaust air to the outside. An exhaust port on the housing in a normal direction of the driven pulley at the rearward of a center of rotation of the driven pulley as seen from a side.

Abstract: A centrifugal supercharger is disclosed that includes an internal drive mechanism which embodies the present invention. A pair of sprockets are connected to parallel input and output drive shafts and drivingly connected by a taut, high tension, endless cog-belt seated and running on the two sprockets. A plurality of belt stabilizing components are incorporated therein to provide maintenance-free, low-temperature operation of the drive mechanism. These stabilizing components include air ducts formed in the output sprocket, tensioning members formed in the belt, heat-resistant and high-speed ceramic ball bearings and shock absorbing springs that alone and in combination provide a highly efficient drive mechanism.

Abstract: A noise-suppressed timing belt pulley and a method of making the same is disclosed. The pulley has a toothed face for engaging a toothed timing belt and a pair of flanges for guiding the belt. Air holes are formed in the flanges in positions aligned with the spaces between the teeth of the pulley. Air passages are formed in the rim of the pulley. A channel is formed in the valleys between adjacent teeth between and connecting the air passages. The combination of air holes in the flanges, air passages formed in the rim and the channels formed in the tooth valleys greatly reduces the noise generated by an operating timing belt transmission.

Abstract: An endless elastomeric vacuum sweeper belt for use in a vacuum sweeper having a diamond pattern drive surface. A first set of ribs project inwardly in a substantially diagonal direction along the drive surface of the belt. A second set of ribs project inwardly along the drive surface of the belt in a substantially diagonal direction opposite the direction of the first set of ribs. The first and set second set of ribs together define a diamond-like pattern on the drive surface as well as a number of particle recesses for the temporary collection of matter. Each rib includes knife-like edge portions to increase the traction of the belt on a drive surface by cutting, loosening and expelling foreign matter lodged between the belt drive surface and the rotation member and/or the drive source of the vacuum sweeper.

Abstract: A connecting passageway is provided between a cooling air fan and an enclosure for an enclosed belt drive of an internal-combustion engine, whereby the belt drive is cooled by a cool-air stream diverted from the cooing fan.The connecting passageway is made as an air shaft, which is formed largely from existing parts of the internal-combustion engine and, in addition, is arranged in such a fashion that it has no parts protruding beyond the outer counter of the engine.

Abstract: A number of embodiments of internal combustion engines incorporating toothed belt driven overhead camshafts. In each embodiment, the driving belt is contained within a protective case that is separated from the engine by an air gap for insulation and a cooling fan driven by the camshaft circulates cooling air through the belt case. All embodiments employ air inlets for the belt case that are disposed in sheltered areas so as to prevent contaminants from being drawn into the belt case. In addition, a generator is contained within the belt case for protection.

Abstract: A continuously variable transmission includes a pipe attached to the inner wall of a side cover of a casing. The pipe defines a part of a fluid supply path to a fluid pressure chamber of a follower pulley.

Abstract: A suspension and drive arrangement for an off the road motorcycle having a balloon tired rear wheel. The rear wheel is suspended for movement relative to the frame by a Y-shape trailing arm and a pair of vertically extending suspension elements are interposed between the trailing arm and the frame for cushioning shock transmitted to the rear wheel. The rear wheel is driven by a chain drive including a first chain that drives an intermediate shaft and a second chain which drives the rear wheel from the intermediate shaft. The first chain is positioned inwardly of the second chain and a pair of embodiments illustrate devices for cooling the first chain. In one embodiment, the chain is cooled purely by ram air whereas the other embodiment provides cooling with both ram air and forced air flow.

Abstract: An apparatus and method for effectively minimizing sound emanation from a power transmission belt drive and providing extended useful life of the power transmission belt by reducing the operating temperature thereof. In the illustrated embodiment, the drive system is enclosed in a housing having one or more inlets and one or more outlets. Air moving structure is provided in association with the pulleys for causing air flow through the interior of the housing from the inlets to the outlets as an incident of operation of the drive system. In the illustrated embodiment, the pulleys are formed of heat conducting material so as to transfer heat from the belt to the air being flowed through the interior of the housing, thereby reducing the operating temperature of the belt.

Abstract: A recreational vehicle having an enclosed, air cooled, variable speed, split sheave V-belt transmission. The transmission is enclosed by a housing having cooperatively located intake and exhaust ports connected respectively to intake and exhaust air conduits. One sheave of each pulley of the transmission includes a plurality of air propelling fins to generate air flow through the housing.

Abstract: A ventilating arrangement for a vehicle generator is proposed where a rotor-stator unit is arranged in a housing equipped with air-guiding ducts. A fan wheel is connected in front of this rotor-stator unit which by means of a pulley is drivingly held on a shaft of the rotor. The pulley is developed as an air delivery wheel and comprises supporting ribs forming radial guide blades. The air delivery wheel serves to partially compress and assist the air flow to the fan wheel.

Abstract: A cooler for a belt type transmission in a power unit for vehicles in which a transmission casing is provided on one side of an engine body, and a belt type transmission composed of a drive pulley connected with the crankshaft of the engine body, a driven pulley connected with an output shaft and an endless transmitting belt engaged between the pulleys is contained in a transmitting chamber in the transmission casing, wherein an air intake passage and a rear air exhaust passage are respectively provided front and rear portions of the transmission casing, an intermediate air exhaust passage is provided in the intermediate between the front portion and the rear portion of the transmission casing, so that the inlet of the intermediate air exhaust passage is opened in the zone that the endless transmitting belt is isolated from the driven pulley at the tension side of the endless transmitting belt in the transmission chamber; and further wherein a suction port is opened in the outer wall of the transmission casin

Abstract: A cooler for a belt type stageless transmission in a vehicle in which a transmission casing is provided on one side of an engine body, and a belt type stageless transmission for operatively connecting between a crank shaft of the engine body and an output shaft supported in the transmission casing is housed in the transmitted casing, wherein a centrifugal fan for sucking the open air into the transmission casing is provided on either one of a pair of pulley halves of a variable diameter pulley of the transmission and an axial flow fan for guiding the sucked-in open air in the axial direction of the variable diameter pulley is provided on the other pulley half; wherein an air intake port is opened in the front portion of the transmission casing in the vicinity of the centrifugal fan and an air exhaust port is in the rear portion of the transmission casing, and a guide plate for guding the air flowing along the lower surface of the transmission casing so as to peel it off from the lower surface is further provi

Abstract: A suspension and drive arrangement for an off the road motorcycle having a balloon tired rear wheel. The rear wheel is suspended for movement relative to the frame by a Y-shape trailing arm and a pair of vertically extending suspension elements are interposed between the trailing arm and the frame for cushioning shock transmitted to the rear wheel. The rear wheel is driven by a chain drive including a first chain that drives an intermediate shaft and a second chain which drives the rear wheel from the intermediate shaft. The first chain is positioned inwardly of the second chain and a pair of embodiments illustrate devices for cooling the first chain. In one embodiment, the chain is cooled purely by ram air whereas the other embodiment provides cooling with both ram air and forced air flow.

Abstract: Power transmission of the belt type which includes a transmission casing made up of a case and a cover. A drive shaft and a driven shaft each extend into the case. A drive pulley is mounted on the drive shaft and a driven pulley is mounted on the driven shaft. A belt extends over both the drive pulley and the driven pulley. A fan is mounted on at least one of the shafts. A partition plate extends the length of the casing dividing the casing into a case side compartment and a cover side compartment. The belt and the fan are positioned in the cover side compartment. The fan can be formed on an outer side of one of the pulleys including radially outwardly extending fins and side fins extending axially integrally from the radial fins. Air passages are formed between any two fins and between each side fin and the outer side of the pulley. All of the side fins together can form an annular disc.

Abstract: A belt pulley and method of making the same are provided, the pulley having a hub and a peripheral groove for receiving part of an endless belt therein that is to drive the pulley or be driven thereby whereby the pulley is adapted to be rotated about the axis of the hub. The pulley has a plurality of vanes extending outwardly from at least one of the opposed sides thereof, the vanes comprising a plurality of spaced apart curved vanes of substantially the same size and shape and disposed in a plurality of circular arrays that are generally concentrically disposed relative to each other about the axis and on the one side of the pulley for acting on fluid adjacent the pulley to tend to cool the pulley with the fluid. The curved vanes in each circular array are each disposed substantially evenly between an adjacent pair of curved vanes in the circular array adjacent thereto whereby the number of the curved vanes in each circular array is the same, each curved vane having a convex side and a concave side.

Abstract: A belt pulley and method of making the same are provided, the pulley having a hub and a peripheral groove for receiving part of an endless belt therein that is to drive the pulley or be driven thereby whereby the pulley is adapted to be rotated about a longitudinal axis of the hub. The pulley has a pair of opposed facing sides defining at least part of the groove therebetween and has a pair of oppositely facing outboard sides, the sides each having an inner peripheral portion and an outer peripheral portion. The pulley has a plurality of circumferentially spaced apart and radially disposed substantially straight vanes extending outwardly from at least one of the outboard sides thereof.

Abstract: A belt pulley and method of making the same are provided, the pulley having a hub and a peripheral groove for receiving part of an endless belt therein that is to drive the pulley or be driven thereby whereby the pulley is adapted to be rotated about the axis of the hub. The pulley has at least one passage provided with an inlet adjacent the hub and an outlet adjacent the peripheral groove whereby fluid passing through the passage from the inlet to the outlet thereof will tend to cool the pulley and/or the belt as the pulley rotates about the axis of the hub. A rotatably operable fluid flow forcing unit is carried by the pulley so as to be rotated and thereby operated in unison with the pulley and is disposed upstream from the inlet for forcing fluid into the inlet and thus through the passage as the pulley and the fluid flow forcing unit rotate about the axis of the hub.

Abstract: This utility concerns about a kind of ventilation device comprising a pair of fans slantly installed on the cover of a stepless speed-change device (a belt transmission), especially that used in a vertical milling machine.

Abstract: A belt pulley and method of making the same are provided, the pulley having a hub and a peripheral groove for receiving part of an endless belt therein that is to drive the pulley or be driven thereby whereby the pulley is adapted to be rotated about the axis of the hub. The pulley has a plurality of vanes extending outwardly from at least one of the opposed sides thereof, the vanes comprising a plurality of spaced apart curved vanes of substantially the same size and shape and disposed in a plurality of circular arrays that are generally concentrically disposed relative to each other about the axis and on the one side of the pulley for acting on fluid adjacent the pulley to tend to cool the pulley with the fluid. The curved vanes in each circular array are each disposed substantially evenly between an adjacent pair of curved vanes in the circular array adjacent thereto whereby the number of the curved vanes in each circular array is the same, each curved vane having a convex side and a concave side.

Abstract: A cooling fan is provided on at least one of the drive pulley and the driven pulley which are drivingly coupled together by means of a belt. The casing in which the pulleys and the belt are accommodated is provided with air inlet port means and air outlet port means. Rotation of the cooling fan in unison with rotation of the pulley provided with the cooling fan causes fresh air to be forcibly sucked into the casing through the air inlet port means, and discharged to the outside through the air outlet port means after cooling the pulleys and the belt. The air inlet port means and the air outlet port means are arranged or constructed so as to prevent intrusion of dust, mud, water, etc. into the casing. Further provided are means for enhancing the efficiency of cooling the driven pulley by the fresh air drawn in as well as means for radiating heat generated within the casing through the casing walls.

Abstract: A belt pulley and method of making the same are provided, the pulley having a hub and a peripheral groove for receiving part of an endless belt therein that is to drive the pulley or be driven thereby whereby the pulley is adapted to be rotated about the axis of the hub. The pulley has at least one passage provided with an inlet adjacent the hub and an outlet adjacent the peripheral groove whereby fluid passing through the passage from the inlet to the outlet thereof will tend to cool the pulley and/or the belt as the pulley rotates about the axis of the hub. A rotatably operable fluid flow forcing unit is carried by the pulley so as to be rotated and thereby operated in unison with the pulley and is disposed upstream from the inlet for forcing fluid into the inlet and thus through the passage as the pulley and the fluid flow forcing unit rotate about the axis of the hub.

Abstract: Twisting machine with a guide pulley for filamentary material and which is rotatable about its own axis and about a second axis causing air to impinge on one of the pulley sides. Impeller surfaces extend inwardly from the pulley rim to axis in rotating the pulley because of air impingement. Conveniently, the impeller surfaces are formed on spokes of the pulley.

Abstract: A belt pulley and method of making the same are provided, the pulley having a hub and a peripheral groove for receiving part of an endless belt therein that is to drive the pulley or be driven thereby whereby the pulley is adapted to be rotated about a longitudinal axis of the hub. The pulley has a pair of opposed facing sides defining at least part of the groove therebetween and has a pair of oppositely facing outboard sides, the sides each having an inner peripheral portion and an outer peripheral portion. The pulley has a plurality of circumferentially spaced apart and radially disposed substantially straight vanes extending outwardly from at least one of the outboard sides thereof.

Abstract: A belt pulley and method of making the same are provided, the pulley having a hub and a peripheral groove for receiving part of an endless belt therein that is to drive the pulley or be driven thereby whereby the pulley is adapted to be rotated about the axis of the hub. The groove of the pulley defines an annular bottom surface of the groove and a pair of spaced apart angled inside surfaces of the groove that join with the bottom surface and diverge away from each other as the angled surfaces extend away from the bottom surface. The angled surfaces are adapted to be engaged by opposed angled sides of the belt in such a manner that a bottom of the belt will be spaced from the bottom surface. The pulley has opposed outer sides.

Abstract: A cooling fan is provided on at least one of the drive pulley and the driven pulley on which the drive belt is wound. A substantially closed casing in which the pulleys and the belt are accommodated has its interior partitioned in two chambers. With rotation of the fan, the air inside the casing is circulated within the casing where one of the chambers acts as a going passage and the other as a return passage, respectively, to thereby cool the pulleys and the belt. The two chambers are communicated with each other by communication means which are arranged at the pulleys and adapted to allow smooth movement of the air through the pulleys. Further provided are means for enhancing the efficiency of cooling the driven pulley by the circulating air and means for radiating heat generated within the casing through the casing walls.

Abstract: A variable speed V-belt transmission in which the axially movable pulley half has fixed to it a cap that defines an internal cavity in which the speed responsive mechanism is incorporated for axially moving this pulley half. The cap is formed with a plurality of apertures that pass a portion of the transmission when the axially movable pulley half is in one of its extreme positions for cooling the transmission.

Abstract: A cooling system for a machine tool utilizing an independently operated fan. The machine tool power transmission housing mounts the fan to draw the cool, ambient air through the housing in a heat exchange relationship with the heat generating elements of the power transmission means. The fan is automatically operated by means of a temperature monitoring switch mounted on the power transmission housing. The drive motor housing is independent of the power transmission housing and is constructed and defined to permit the motor to draw in the cool ambient air in a heat exchange relationship with the motor when it is operative and to expel the hot air therefrom.

Abstract: In a V-belt drive having a rotating pulley and an annular flange formed about the pulley axis and extending axially from a side of the pulley; a plurality of vanes extending from the radial outer surface of the flange; a plurality of air passages extending through the flange with each passage having an axis directed radially outwardly and toward the plane of said pulley, said passages being close to but in trailing relation to a vane.