Abstract: A gear drive has an enclosed housing that acts as a lubricant reservoir. Hollow, finned heat exchanger tubes are mounted in the housing at a level where they are submerged beneath the surface of the pool of lubricant in the housing. The tubes extend outward of the housing and connections are made external of the housing between the tubes and a source of a cooling liquid, such as water, and a drain.

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-drive assembly for use on air-moving systems in corrosive atmospheres comprising a larger non-metallic driven sheave in conjunction with a smaller metallic driver sheave wherein the metallic sheave may be located in a vented enclosure is disclosed. This arrangement prevents corrosion of the drive system and prolongs belt life.

Abstract: A housing assembly for a power transmission unit comprises a casing provided at the open end thereof with an upright peripheral seating face and a cover member fitted at its upright peripheral seating face to the upright peripheral seating face of the casing in a fluid-tight manner. The cover member is provided at the head portion thereof with a vertical vent hole and is integrally formed at the inner wall thereof with a laterally slanted protrusion fitted to the upper corner of the casing seating face in a fluid-tight manner to form an air passage communicating the vent hole into the casing, and an air breather plug assembly is coupled over the vent hole. The air passage is designed to be wider at its lower portion and to be narrower towards its upper portion. An air chamber is provided between the upper end of the air passage and the vent hole.

Abstract: In a rear engined or mid engined type of automotive vehicle in which a liquid cooled internal combustion engine is mounted at least partly behind a passenger compartment, and a radiator for cooling the cooling fluid of the engine is mounted in front of the passenger compartment, with a mechanism being provided for conducting flow of cooling fluid between the cooling fluid jacket of the engine and the radiator in both directions, a cooling system for lubricating oil of the engine includes a heat exchanger formed with a cooling fluid passage and a lubricating oil passage arranged to exchange heat therebetween to conduct respectively a flow of cooling fluid and a flow of lubricating oil from the internal combustion engine, wherein the cooling fluid passage of the heat exchanger is a part of the cooling fluid flow conducting mechanism, so as not to the heat exchanger without substantially increasing the flow resistance of the cooling fluid flow conducting mechanism.

Abstract: This invention relates to a cooling mechanism of a rotary hydraulic cylinder for chucking operation of machine tools. In a rotary hydraulic cylinder which consist of a rotor member having a reciprocable piston inside and in which working oil is fed to the piston in said rotor member, many fins are mounted, parallel to the movements of said piston rod, on the outer periphery of said working oil supplying member, and a cylinder-like cover whose side facing to said rotor member is folded inside to make a flange, is mounted at the edge, of said fins, facing said rotor, so that it may partially enclose the outer peripheral surface of said rotor member. The side of the rotor member enclosed by said cylinder-like cover, of said oil supplying member is provided with a rotary fan which rotates together with said roller member, thereby causing an air inlet opening of a fixed clearance between said cover and the rotary fan to be formed.

Abstract: A cooling structure for an internal combustion engine, comprises a crankcase for housing an engine crankshaft, a cover defining a cooling chamber between the cover and the crankcase and a transmission case integral with the crankcase. The structure comprises communication passages communicable with the cooling chamber and the transmission case chamber for providing air from the outside through the communication passages to the transmission chamber to suppress the overheating of the transmission unit.

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 gear drive unit has a shaft mounted impeller which a series of blades or vanes inside the housing for the drive. The impeller vanes are positioned to be in the path of travel of oil flung off of a bull gear which rotates in an oil pan extending into an oil bath contained in the housing. The impeller is rotated by the impact of the oil against its vanes. In one embodiment, the rotating impeller drives a fan located outside the housing and the fan circulates air through a series of hollow tubes extending through the housing parallel to the impeller shaft. In another embodiment, the rotating impeller drives fans disposed outside of the housing at both ends of the impeller shaft.

Abstract: An air-cooled wiper motor having self-cooling fan for use in vehicles is disclosed. The wiper motor comprises a motor yoke, a rotatable armature shaft provided in the yoke, a reduction gear mechanism provided at one end of the armature shaft, a vehicle wiper blade connected to the armature shaft through the reduction gear mechanism and being swung reciprocally, a self-cooling fan provided to the other projected end of the armature shaft, a fan cover provided around the fan for forming a ventilation duct having a width not exceeding an outer diameter of the yoke in one diametrical direction between the cover and the outer diameter portion of the yoke, and a bearing having an inner race secured to the armature shaft and an outer race secured to a gear housing of the reduction gear mechanism thereby to hold thrust loads in both directions received by the armature shaft.

Abstract: An engine unit adapted to be lubricated by a liquid lubricant with a lubricant reservoir as well as a lubricant cooling. The cooling takes place by way of at least one heat pipe, with the heat pipe having a heat absorbing portion adapted to be exposed to the lubricant and a heat transmitting portion adapted to be exposed to surrounding air. The engine unit may be an internal combustion engine, a gear system such as a change-speed transmission or differential transmission of a vehicle drive axle.

Abstract: The invention relates to a mechanical press and in particular to a means for achieving thermal stability, particularly shutheight stability, by utilizing the waste heat from lubricant circulated through the drive assembly to heat the uprights. The oil is circulated through the crankshaft and connection arm assembly in the crown and then caused to flow through a thermal transfer device mounted to each of the uprights wherein the heated oil transfers a portion of its heat to the uprights so that they elongate due to thermal expansion at the same rate as the connection arms. The thermal transfer devices comprise a plurality of baffles over and through which the oil flows under gravity or pressure, wherein the baffles cause the oil to form a plurality of vertically spaced pools in good thermal contact with the uprights.

Abstract: A planetary speed change gearing for a power transmission system including a flywheel secured to a power transmission shaft of an engine, a flywheel housing enclosing the flywheel and an output shaft provided on the flywheel side and directly connected to a machine to be driven. The planetary speed gearing is built in a recess formed in the flywheel.

Abstract: An oil storage reservoir has a fluid flow passage which returns fluid to the main transmission reservoir. The storage reservoir is supplied with fluid by the transmission control system and the amount of fluid that returns to the main reservoir from the storage reservoir is controlled by a thermally responsive valve mechanism such that, as the fluid temperature increases, the flow passage is reduced so that the level of oil in the storage reservoir is increased. Thus, the change in fluid volume, due to temperature change, is accommodated by the storage tank as controlled by the thermally responsive valve.

Abstract: A power transmission including a motor, a "fixed-fill" fluid coupling and a gear box, at least the "fixed-fill" fluid coupling of which is liquid cooled.

Abstract: A power transmission unit comprises a trans-axle casing rigidly secured to a cylinder block of an engine and having an upper compartment to contain a clutch for connection to a crankshaft of the engine and a lower compartment to contain a final drive gearing and a differential gear unit connected to each other, a transmission casing sealingly jointed at the upright front face thereof to the upright rear face of the trans-axle casing to contain a change-speed gear transmission drivingly connected to an output shaft of the clutch and coaxially connected to the final drive gearing, and an intermediate plate interposed between the casings to partly support thereon the output shaft of the clutch and the component shafts of the change-speed gear transmission. In the transmission unit, an air breather is provided on a head portion of the intermediate plate to prevent the flow of lubrication oil out from the casings and entrance of water into the casings.

Abstract: A hand-held, manually-operated duster for propelling a controlled stream of pulverulent material, such as an insecticide dust, onto vegetables, roses, flowers, shrubs and small trees and the like and which comprises a unitary housing providing a material hopper and separate impeller and drive chambers, a rotary impeller being mounted in the impeller chamber and a hand crank and gear train being mounted in or associated with the drive chamber and connected to the impeller, powder being fed from the hopper to the impeller for discharge in a controlled stream.

Abstract: A reversible power transmission having a pair of axially spaced selectively actuable brakes each including fixed stator disks and rotor disks. Two ring gears each have gear teeth on inner and outer surfaces with the outer teeth enmeshed with inner teeth on the rotor disks. An input shaft carries a driving sun gear. An output shaft is aligned with the input shaft. A cage carried by the output shaft has two arrays of idler pinion gears journaled in the cage with the first array driven by the sun gear and driving the second array. Each pinion of the first array is enmeshed with teeth on the inside of one of the ring gears, and each pinion of the second array is enmeshed with teeth on the inside of the other ring gear.

Abstract: A fan-cooled gear case has a fan located in a recess and a system of cool channels extending over all faces of the gear case, some of the channels being connected to the inlet side of the fan, while others are connected to the outlet side of the fan. Where necessary, the channels are covered over and have their inlets and outlets situated on the opposite side of the casing to the fan. The fan is driven by a shaft of the gearing.

Abstract: The heat radiator takes the form of an extruded member defining parallel fins on its bottom surface and having a flat top surface arranged to be cemented directly to the bottom surface of a transmission fluid pan in an automobile. A special cement having high thermal conductivity is used and the extruded member may be made in modular form so that the entire area of the bottom of the pan can be covered by forming a set of modular units.

Abstract: An open-end spinning unit having a plurality of spinning points, each having a spinning rotor which is provided with a shaft for mounting and drive. The shafts of the spinning rotors extend into bearing housings, in which means are arranged for mounting the shafts and means are arranged for driving the shafts. To provide effective cooling of the high-speed means for mounting and/or driving, cooling air is provided to these means for mounting and/or driving directly by means of openings in the walls of the bearing housings with the shortest possible path.