Abstract: A waste heat recovery system comprising a thermal circuit. The thermal circuit includes a boiler and an expander fluidly coupled to the boiler. The thermal circuit further includes a power transfer system integrated to the expander. The power transfer system is configured to receive mechanical energy from the expander. The thermal circuit further includes an ejector fluidly coupled to the boiler and to the power transfer system. The ejector is configured to receive a motive flow of working fluid from the boiler. The ejector is further configured to receive a suction flow of working fluid from the power transfer system. The ejector is further configured to combine the motive flow of working fluid and the suction flow of working fluid.

Abstract: A gas turbine engine includes a power unit and an oil system configured to lubricate the power unit during operation of the gas turbine engine. The power unit includes an engine core and a fan coupled with the engine core and driven by the engine core to produce thrust for propelling the gas turbine engine during operation of the gas turbine engine.

Abstract: In a unit-type strain wave gearing, a rotating-side member, which is constituted by a second internally toothed gear and an output shaft is supported, via a first sliding bearing and a second sliding bearing, on a fixed-side member so as to be capable of relative rotation, the fixed-side member being constituted by a unit housing and a first internally toothed gear. Sliding bearing surfaces of the first sliding bearing and sliding bearing surfaces of the second sliding bearing are defined by a conic surface having a central axis line as a center line. It is possible to realize a unit-type strain wave gearing which is advantageous in making smaller and more compact than when a roller bearing is used. It is also easier to adjust the gap between the sliding bearing surfaces because a radial sliding bearing having no function to adjust the radial gap is obviated.

Abstract: A planet carrier for a speed-reducing unit with an epicyclic gear train for a turbine engine, said planet carrier comprising a cage defining an internal space for assembling a central sun gear having an axis of rotation and an annular row of planet gears disposed around the axis and meshed with said sun gear, said cage comprising two substantially parallel annular walls centered on said axis and a cylindrical wall connecting said annular walls to their outer periphery, a first one of said annular walls being connected to a substantially cylindrical body, wherein a second one of said annular walls is formed as a single part with a lubrication grove, channel or duct.

Abstract: In at least some implementations, an automotive driveline unit includes a main housing having an interior and a first reservoir in the interior arranged to collect lubricant, the main housing also having a feed passage that is open to the first reservoir, a gear located within the interior and having a periphery arranged in the first reservoir so that rotation of the gear causes the gear to engage and displace some of the lubricant from the first reservoir, and a second housing carried by the main housing. A second reservoir is defined between the main housing and the second housing, the second reservoir is communicated with the first reservoir via the feed passage and includes multiple, spaced apart outlets through which lubricant exits the second reservoir at different locations to provide lubricant to different areas of the interior of the main housing.

Abstract: A lubricating device for lubricating components includes first and second lubricant guide plates which have respective inclination angles with respect to a horizontal line such that the angle of inclination of the first lubricant guide plate is smaller than that of the second lubricant guide plate. The inclination angle of the first lubricant guide plate is determined to permit the lubricant oil guided by the first lubricant guide plate to be directed into the catcher reservoir, and to inhibit the lubricant oil from being supplied to component or components disposed above the gear, and the inclination angle of the second lubricant guide plate is determined to permit the lubricant oil guided by the second lubricant guide plate to be supplied to the component or components disposed above the gear.

Abstract: A device for providing a transmission with a lubricant or for oil-cooling a piston in the engine of a motor vehicle, comprising a lubricant- or oil-distribution pipe having at least one injection pipe branching off therefrom for delivering the lubricant or the oil to the respective components of the transmission or the engine, and a method for producing same.

Abstract: A hybrid drive module, comprising a housing (170) enclosing a chain drive (120) connecting an electrical motor (110) with a crank shaft (22) of an associated internal combustion engine (20) via at least one coupling (130, 140). The housing (170) further comprises a reservoir (190) and a removable lid (400) for allowing access to parts of the electrical motor (110), and the lid (400) is arranged at a distance from said reservoir (190).

Abstract: A vehicle transfer case is provided having a housing, a primary shaft rotatably mounted within the housing, a secondary shaft selectively driven by the primary shaft, a hub torsionally fixed with the primary shaft, a clutch housing selectively torsionally connected with the hub via a friction pack, an engagement wheel torsionally fixed with respect to the clutch housing and torsionally connected with the secondary shaft via a flexible torsional force member, the friction pack, upon engagement, causing the clutch housing to be selectively connected with the hub, a reservoir system fixed with respect to the housing capturing lubricant energized by result of the operation of the flexible torsional member, the reservoir system delivering splashed lubricant to a reservoir system, and an Archimedes' screw pump delivering lubricant from a sump adjacent to the secondary shaft to the secondary reservoir system.

Abstract: In a vehicular final speed reducing device, the intermediate, rear, bottom and the side walls define a breather chamber, and the partition wall divides the breather chamber into auxiliary and primary breather chambers. The auxiliary breather chamber is held in communication with a space outside the breather chamber and within the housing, through a first hole formed through the intermediate wall, and through an opening formed between the intermediate and bottom walls. The primary breather chamber is held in communication with an outside atmosphere outside the housing, and with the auxiliary breather chamber through a second hole formed through the partition wall. The bottom wall extends from the rear wall such that a front end of the bottom wall is located forwardly of the opening in the axial direction of the ring gear.

Abstract: A differential unit includes: a pinion gear shaft including a shaft portion and a gear portion; a ring gear meshing with the gear portion; a differential case that rotates with the ring gear; a differential gear mechanism accommodated in the differential case; a differential carrier having an accommodating space accommodating the differential case and the ring gear; and a pair of bearings supporting the pinion gear shaft such that the pinion gear shaft is rotatable with respect to the differential carrier. The differential carrier has an inner cylindrical portion, an outer cylindrical portion, and a connecting portion that are provided as a single member. The inner cylindrical portion has the pair of bearings fitted in the inner cylindrical portion. The outer cylindrical portion is provided radially outward of the inner cylindrical portion. The connecting portion connects the inner cylindrical portion and the outer cylindrical portion.

Abstract: A gas turbine engine includes a geared architecture with a multiple of intermediate gears, and a baffle with an oil scavenge scoop adjacent to each of the multiple of intermediate gears. A geared architecture and method are also disclosed.

Abstract: In order to provide a cooling structure of a stator of a rotating electrical machine that is capable of surely cooling a stator coil end of each unit coil, a cooling structure of a stator of a rotating electrical machine that conducts cooling of a stator coil end (42A) by a refrigerant is provided with an oil guide (52) including a refrigerant passage (521) that is disposed to be opposed to an axial end portion of the stator coil end (42A), the refrigerant flowing through the refrigerant passage (521); and a refrigerant discharging portion (523) that projects from the refrigerant passage (521) toward the stator coil end (42A) of each unit coil (42a) and discharges the refrigerant from a tip end thereof.

Abstract: Transmission arrangement for a motor vehicle, comprising at least one clutch unit and at least one actuator unit that allows the clutch unit to be actuated; the actuator unit additionally allows a pump to be actuated such that lubricant is pumped from a lubricant sump into a lubricant reservoir.

Abstract: An oil supply structure includes an oil passage that provides communication from a wall portion of a casing, which corresponds to a shaft end portion of a rotary shaft pivotally supported in the casing to the shaft end portion of the rotary shaft. The oil passage includes a shaft end oil passage and an in-shaft oil passage. The shaft end oil passage is provided on a shaft end portion side of the rotary shaft. The in-shaft oil passage is provided in the rotary shaft, and extends an axial direction of the rotary shaft from the shaft end oil passage. A flow rate adjusting member is provided to the shaft end oil passage, and adjusts lubricating oil which flows from the shaft end oil passage to the in-shaft oil passage.

Abstract: A lubrication system for an in-wheel motor powertrain is proposed. The system includes a housing having a motor and supporting a wheel, and having a space therein; an input gear and an output gear provided in the housing; two intermediate gears each provided with a first gear meshed with the input gear, and a second gear meshed with the output gear and having a pitch circle diameter different from that of the first gear, the first and second gears being integrally and concentrically coupled together; a pump gear meshed with the input gear; a bearing plate rotatably supporting the input gear, the output gear, and the intermediate gears; a cover plate configured to provide a part of a lubrication pump driven by the pump gear; and a first oil supply part provided by the cover plate and a mid-plate to lubricate the output gear and the intermediate gears.

Abstract: The present disclosure describes a lubrication oil piping gutter of an aircraft turbomachine. The lubrication oil piping gutter can be used for a sun gear train reducer of the turbomachine. The gutter may include two lateral annular walls connected at their outer periphery by an annular bottom wall. In some embodiments, the annular bottom wall may include at least one oil evacuation opening in which is located a deflector configured to facilitate the flow of oil radially from the inside to the outside of the gutter.

Abstract: A reduction in the amount of filled grease and a reduction in weight are achieved, and an excessive rise in the internal pressure is suppressed. Provided is a gearbox including: a plurality of gears that are rotated by a motor; a housing that has a sealed interior space for rotatably accommodating the respective gears; and a spacer that is disposed in the interior space of the housing and that partially occupies the interior space, wherein the spacer has a lower density than grease and is elastically deformable so as to change the volume thereof according to the internal pressure of the interior space.

Abstract: A hybrid drive module, comprising a housing (170) enclosing a chain drive (120) connecting an electrical motor (110) with a crank shaft (22) of an associated internal combustion engine (20) via at least one coupling (130, 140). Said housing (170) further comprises a reservoir (190) having an inlet (212) configured to receive oil from the chain (126) during operation, and an outlet (214, 214?) arranged to distribute oil back to the chain (126).

Abstract: An apparatus for converting rotational movement into linear movement is disclosed. The apparatus comprises: a screw member having a threaded external surface and a sleeve member having a threaded interior surface for receiving the threaded external surface of the screw member, wherein the threaded surfaces are configured so that rotation of the screw member relative to the sleeve member, in use, causes the screw member to move axially relative to the sleeve member. The apparatus may also comprise a force applicator for applying pressure to the region between the screw member and sleeve member so as to urge the external surface of the screw member and the opposing interior surface of the sleeve member apart from each other.

Abstract: A planetary gear system including a first gear coupled to a shaft, a plurality of second gears in rotational engagement with the first gear, a fluid supply apparatus spaced apart from the second gears, and a carrier. The carrier includes an annular portion having a flow channel configured to receive a fluid deposited onto the carrier by the fluid supply apparatus. A pinion shaft is disposed through each of the second gears and includes a primary fluid conduit in fluid communication with the flow channel and at least one secondary fluid conduit in fluid communication with the primary fluid conduit. The primary fluid conduit and the at least one secondary fluid conduit facilitate a flow of the fluid from the flow channel to at least one bearing disposed on each of the pinion shafts and at least one thrust plate interposed between the second gears and the carrier.

Abstract: A vehicle drive unit assembly having a housing having a hollow interior portion therein with a size and shape to receive and/or retain at least a portion of a gear assembly. At least a portion of a shroud having an inner surface, an outer surface, a first side, a second side, a first end portion, a second end portion and an intermediate portion is disposed within the hollow interior portion of the housing. One or more first shroud channels having extend inward into a body portion of the shroud from at least a portion of the second side of the shroud. At least a portion of one or more inlet openings of the shroud are disposed in the second side of the shroud and at least a portion of the one or more outlet openings of the shroud are disposed within the inner surface of the shroud.

Abstract: A power transmission device includes: a planetary gear mechanism having a sun gear, a ring gear, a plurality of pinion gears meshing with the ring gear, a pinion shaft rotatably supporting the pinion gear, and a carrier plate holding the pinion shaft, the pinion shaft having an opening that is open on one end portion in an axial direction and an oil passage that communicates with the opening and supplies lubricant flowing from the opening to an inner peripheral surface of the pinion gear; and an oil receiver, which is attached to the carrier plate, receiving lubricant, which is scattered outward in a radial direction of the ring gear from a meshing portion between the pinion gear and the ring gear at a time of rotation of the pinion gear, and guiding the lubricant to the opening.

Abstract: An automatic analyzing apparatus includes a stirring mechanism. The stirring mechanism is provided with: a fixed member fixed to an apparatus body; a motor attached to the fixed member; a drive-side helical gear provided on a drive shaft of the motor; bearings provided to the fixed member with the center shaft held parallel to the drive shaft of the motor; a support member of circular column shape, supported so as to be capable of receding from one side relative to the bearings; a driven-side helical gear fixed to an end of the support member coaxially with respect to the support member such that the driven-side helical gear is fitted together with the drive-side helical gear with the support member recessed into the bearings; and a stirring rod extending coaxially with the support member from the end of the support member opposite to the end provided with the driven-side helical gear.

Abstract: A wave generator of a strain wave gearing is provided with a rigid plug, a wave bearing mounted to the ellipsoidal outer peripheral surface of the rigid plug, and four elastic claws that rotate integrally with the rigid plug. The balls of the wave bearing include balls in a loose state and balls in a tight state. The loose-state balls adjacent to the tight-state balls are applied with braking force by the elastic claws immediately before they transition into a tight state, and the orbital motion thereof is temporarily prevented or suppressed, whereby the gaps between the loose-state balls and the adjacent tight-state balls are secured. It is possible to prevent increase in rotational torque, damage to the balls or other defects due to ball-to-ball contact by the tight-state balls.

Abstract: A lubrication system includes an engine oil pump, a lubricating oil tank, a breathing pipe, a machine body, and an oil pan. The engine oil pump is formed by superposing upper and lower layers being a lubricating pump and an oil return pump. An oil inlet of the oil return pump leads to a cavity of the oil pan, and an oil outlet leads to an interior of the lubricating oil tank. An oil inlet of the lubricating pump leads to the interior of the lubricating oil tank, and an oil outlet leads to a machine filter. The machine filter is communicated with a main oil path of the machine body. An oil tank cover of the lubricating oil tank is provided with a breathing one-way valve and an oil filling port. The breathing one-way valve communicates one end of the breathing pipe, and the other end thereof communicates a crankcase.

Abstract: A bearing assembly configured to rotationally support a first component relative to a second component includes at least one bearing and at least one closure element configured to close an opening in the first component, which opening is disposed axially adjacent to the bearing. The closure element may be a cured body of foam that conforms to the shape of the opening or a ring mounted on the first component such that it covers the opening.

Abstract: A transmission includes an oil pipe disposed above a first gear group and a second gear group, the oil pipe having small holes. The oil pipe is formed integrally with a first restricting portion and a second restricting portion, the first restricting portion abutting against an inner surface of a first unit inside a case to thereby restrict an axial position of the oil pipe on an outside in one direction, and the second restricting portion abutting against an inner surface of a second unit to thereby restrict an axial position of the oil pipe on an outside in an other direction and rotation thereof.

Abstract: A lubrication system for a transfer case may include a sump. A drive chain may be in operable association with the sump. A snubber may be disposed in close proximity to the drive chain. The snubber may include a channel and a conduit in fluid communication with the channel.

Abstract: A motor vehicle vacuum driven hydraulic balance system includes a housing. A shaft rotatably supported in the housing has a longitudinal bore to deliver oil flow to a plurality of ports created in the shaft. A vacuum flow passage communicates with both the longitudinal bore and an oil sump. A first delivery passage is created in a portion of the housing, the first delivery passage in direct communication with the longitudinal bore. An electrical oil pump pumps oil from the oil sump to the longitudinal bore through the first delivery passage. Axial rotation of the shaft creates a partial vacuum in the longitudinal bore acting to vacuum drag oil from the oil sump through the vacuum flow passage to the longitudinal bore in addition to a volume of the oil delivered to the longitudinal bore by the electrical oil pump.

Abstract: A power transmission device is provided. A rotary shaft is provided in a housing via a bearing. A lubricant passage that is opened at an end is formed in the rotary shaft. A discharge channel that discharges the lubricant in the lubricant passage in a radial direction from an opening at the end of the rotary shaft and supplies the lubricant to the bearing is provided. An annular protruding portion is provided in the discharge channel. The annular protruding portion is formed on an inner surface of the housing facing an axial direction of the rotary shaft and protrudes to between the rotary shaft and the bearing.

Abstract: Provided is a speed-switchable reduction gear including: an input shaft; an output shaft; a plurality of output-side geared-wheels mounted on the output shaft; a shifter for selecting the output-side geared-wheel to be used; a shifter-side first bearing and a non-shifter-side second bearing provided to each the output-side geared-wheel; and a plurality of dividing walls each provided in each cell between the first and second bearings. The output shaft has an axial lubricating-oil flow path and a plurality of supply flow paths. Each dividing wall divides each cell into a first cell adjacent to the first bearing and a second cell adjacent to the second bearing and allows lubricating oil to be supplied from the supply flow paths into the first and second cells so as to make pressure of lubricating oil in the first cell higher than that in the second cell.

Abstract: A journal bearing for a gas turbine engine is described. The journal extends along a central axis from a first axial end face to a second axial end face thereof, and has at least one undercut defined circumferentially about the central axis in one of the first and second axial end faces. The undercut extends toward the other one of the first and second axial end faces of the journal. A stiffening member extends across the undercut to interconnect opposite surfaces thereof. Also described, a journal bearing comprising a tubular body extending axially along a central axis, where the tubular body has a first and a second opposite axial end faces with holes projecting into the first axial end face toward the second axial end face and having a finite depth. The holes are circumferentially disposed about the central axis, and respective webs of material are defined between adjacent holes. A method of operating a journal bearing is also provided.

Abstract: A spur gear transmission has at least two toothed spur gears with toothings that are in meshing engagement with one another and which are each rotatable about an axis of rotation. An enveloping wall at least partially encloses the two spur gears in a circumferential direction and in the direction of the axis of rotation. The enveloping wall has an inner contour adapted to the outer diameters of the spur gears such that, between the enveloping wall and the spur gears, there are formed two ring-shaped gaps which transition into one another, wherein in each case one ring-shaped gap is arranged concentrically with in each case one axis of rotation. A lubricating device conducts a lubricant flow into the toothings of the spur gears. A cooling device is additionally provided, which conducts a coolant flow through one or more cooling ducts within and/or along the outside of the enveloping wall.

Abstract: A rear axle drive (2) for an AWD vehicle is presented. The rear axle drive (2) is connected to an hydraulic AWD coupling (3), wherein the rear axle drive (2) comprises a lubrication valve (4) for controlling the level of lubricant in at least one lubricant reservoir (6, 7) of the rear axle drive (2) for providing lubricant to gears and/or bearings of the rear axle drive (2). The lubrication valve (4) is functionally connected to a shut-off valve (5) of the AWD coupling (3) and the lubrication valve (4) of the rear axle drive (3) is controlled by movement of an actuating member (51, 54) of the AWD coupling (3).

Abstract: A lubrication system of a power assembly of an electric scooter includes a case duct and a bearing seat duct formed in a case of the power assembly, and a driven gear shaft duct formed in a driven gear shaft of a driven gear. Lubricant flows to the case duct, the driven gear shaft duct, a driven gear bearing seat in the case, the bearing seat duct, a driving bearing seat in the case in sequence. The lubrication system has a short flowing distance of the lubricant to enhance the effects of lubrication and reducing temperature.

Abstract: A component for a motor vehicle, with at least one receiving space for structural elements of the drive component, with at least one first wall that delimits the receiving space at least partially, by way of which at least one collecting region for collecting a lubricant for lubricating the structural elements is delimited at least partially, and with at least one second wall, which is arranged on a side of the first wall that faces away from the collecting region, and which is spaced apart from the first wall at least in a partial region, so that, between the walls, an intermediate space that is delimited at least partially by the walls is formed. For setting a heat transfer coefficient between the walls, a liquid can be introduced into the intermediate space and discharged out of the intermediate space.

Abstract: A harmonic reducer with an oil guiding ring, wherein an oil guiding ring is disposed in an accommodating space of a flexible external gear, and the oil guiding ring is sleeved on a coupling member and located between a first housing and a flexible bearing. Therefore, after lubricant oil is injected through the oil filling hole of the first housing, the lubricant oil enters an annular oil storage groove through the oil inlet holes of the oil guiding ring. When the wave generator rotates, the lubricant oil in the annular oil storage groove is guided to the flexible bearing of the wave generator by the annular wall surface to lubricate the flexible bearing. Therefore, on the basis of effective lubrication, the harmonic reducer can avoid the foreign body impurity caused by insufficient lubrication, and at the same time, does not have to change the original design.

Abstract: A motor unit including a drive motor that includes an output shaft having a hollow portion; a torque sensor arranged within the hollow portion; and a cooling mechanism. The cooling mechanism has one end of a coolant path arranged inside the hollow portion and cools the drive motor and the torque sensor. A vehicle can include the motor unit. The drive motor can act as a traction motor generating traction drive force of the vehicle.

Abstract: A toroidal continuously variable transmission includes a preload spring disposed between a rotary assembly including a first disc and a pressing device, and a driving force transmission shaft, and a thrust bearing disposed between a first member and the preload spring, the first member being one of the rotary assembly and the driving force transmission shaft. In a direction of an axis line, a gap is formed between a second member and the thrust bearing, the second member being the other of the rotary assembly and the driving force transmission shaft. A dimension of the gap in the direction of the axis line is less than a deformation amount of the preload spring in the direction of the axis line, at an elastic limit.

Abstract: A gearbox assembly for a gas turbine engine used in an aircraft having passive lubrication capabilities during wind milling includes a gearbox housing, a gear train assembly housed within the gearbox housing, a lubricant in the gearbox housing for lubricating the gear train assembly, and a first scavenge port formed in the gearbox housing. The first scavenge port is changeable between an open position and a closed position. Further, the first scavenge port remains in the open position during normal operation of the gas turbine engine to allow the lubricant to drain from the gearbox housing. Upon occurrence of a loss of lubricant pressure in the gearbox assembly, the first scavenge port is changed to the closed position to trap at least a portion of the lubricant in the gearbox housing. Thus, the trapped lubricant provides passive lubrication to the gear train assembly during the loss of lubricant pressure.

Abstract: A power transmission system includes a first case, a second case, a first tube, and a shaft. The first tube is configured to supply a lubricating oil to a first bearing and a second bearing. A shaft is rotatably supported by the first bearing and the second bearing. The shaft is provided with a through-hole extending through the shaft in an axial direction of the shaft. The first tube is insertedly fixed to an insertion hole of the first case from an outside of a space where the shaft is disposed. The first tube includes a first opening and a second opening, the first opening is configured to supply the lubricating oil to the first bearing, and the second opening is configured to supply the lubricating oil to the second bearing via the through-hole of the shaft.

Abstract: A computer program product for maintaining a machine. The system includes an aerial vehicle configured to fly to a lubrication location proximate the machine. A supply of friction minimizing material is carried by the aerial vehicle. A controller is configured to deliver at least part of the supply of friction minimizing material to the machine when the aerial vehicle is at the lubrication location.

Abstract: An internal contact part of a wave generator of a strain wave gearing, a contact part between an externally toothed gear and the wave generator, and tooth surface parts are lubricated by a lubricating fine powder. When the strain wave gearing is in operation, the lubricating fine powder is supplied to the internal contact part and the contact part by a first powder guide that rotates integrally with the wave generator. Having passed through these sections, the lubricating fine powder is supplied to the tooth surface parts by a second powder guide that rotates integrally with the wave generator. Each component part can be reliably lubricated regardless of the orientation of the strain wave gearing during operation.

Abstract: Provided is a hydraulic supply structure. The hydraulic supply structure includes an inner pipe configured to form a first pipe path which is a part of a first hydraulic supply passage, an outer pipe configured to form a second pipe path which is a part of a second hydraulic supply passage between the inner pipe and the outer pipe, and an annular inner pipe holding portion and an annular outer pipe holding portion configured to fix the inner pipe and the outer pipe to a casing. Each of the outer pipe holding portion and the inner pipe holding portion is a part of a pipe holding member configured as an integral member.

Abstract: A transmission includes a transmission housing with an oil reservoir and a transmission housing cover to close an opening of the transmission housing. A transmission shaft receives a toothed wheel and which can be driven by way of a motor. A cooler is arranged on the outside of the transmission housing, with a fan arranged on the outside of the transmission housing feeding cooling air to the cooler. An oil delivery pump pumps oil through oil delivery lines from the oil reservoir to the cooler, with an oil return line routing oil from the cooler back to the transmission housing. A separate drive motor drives the fan and the oil delivery pump independently of the transmission shaft, with the drive motor, the fan, the cooler and the oil delivery pump being fastened to the transmission housing cover.

Abstract: An axle system having a first axle assembly, a second axle assembly, and a conduit. The conduit may fluidly connect the first axle assembly to the second axle assembly such that lubricant may flow between a first housing assembly of the first axle assembly and a second housing assembly of the second axle assembly.

Abstract: A mechanical device lubrication level control system operates within a mechanical housing having a sump cavity and a lubricant director, where the lubricant director is located at the bottom of the housing. A mechanical gear set is located in the sump cavity and a lube tank is located in the lubricant director. There is located within in lube tank either a motor with a pump or an expandable air bladder that is inflatable by an air source. For the lube tank having the motor with the pump, the pump controls the lubricant within the sump cavity. For the lube tank having the expandable air bladder, the air source controls the lubricant within the sump cavity.

Abstract: An aeration preventing apparatus including a partition erected on an upper surface of a bottom wall portion of a case member to separate a reservoir space of oil into a radially inward space and a radially outward space and provided with openings formed over a whole circumference in the partition so as to communicate the radially inward space and the radially outward space, an oil passage forming part forming an oil passage from a suction port facing the radially inward space to an oil pump, a movable plate formed in a substantially arc shape and disposed facing a peripheral surface of the partition so as to cover a part of the openings, and a plate support supporting the movable plate to be movable along the peripheral surface of the partition by a gravitational or inertial force acting on the movable plate.

Abstract: A gear pair includes a first gear and a second gear that are engaged and paired with each other, wherein the arithmetic average roughness Ra of the tooth surface of the first gear is less than 0.10, and the arithmetic average roughness Ra of the tooth surface of the second gear is equal to or greater than 0.15. An improvement of the transmission efficiency is achieved due to the improved composite roughness of the gear pair. Accordingly, both of the improvement of the transmission efficiency of the gears and an improvement of the pitting fatigue life are achieved at low cost.