Abstract: An electrical water cleaner includes an electric motor and a hydraulic pump activated thereby, a sealed external cylindrical casing containing the motor, a shaft of which is associated to a rotor and exits the casing through the two circular bottom walls thereof in a presence of seal rings, and bears at an end thereof means for activating the pump, and at an opposite end thereof an air-cooling fan, the fan being contained in a substantially cylindrical external casing which at least in part develops parallel to the cylindrical wall of the casing, a cylindrical stator of which is fixed internally of the casing, in which the casing is sealed and contains a quantity of dielectric cooling liquid able to convey heat generated by the electric motor into the cylindrical wall of the casing, from which the heat is removed by the air generated by the cooling fan.

Abstract: An object is to provide a multi-stage electric centrifugal compressor including an electric motor and free from risk of breakdown of an operation control part due to heat generated by low-pressure stage and high-pressure stage compressors. A multi-stage electric centrifugal compressor includes: an electric motor; a pair of centrifugal compressors coupled to either side of the electric motor, the pair of centrifugal compressors comprising a low-pressure stage compressor and a high-pressure stage compressor connected in series; a heat-shielding plate disposed between an end portion on a low-pressure-stage-compressor side of the electric motor and an end portion on a motor-housing side of the low-pressure stage compressor, and configured to shield heat generated by the low-pressure stage compressor; and a bending portion disposed in middle of the heat-shielding plate, and extending along a rotational shaft of the electric motor so as to surround an outer periphery of the rotational shaft.

Abstract: A fan module comprises a frame and at least one filling component. The frame comprises a base plate and a plurality of partition plates. A plurality of air flow channels are formed by the base plate and the plurality of partition plates. Each partition plate has a first fixing slot, a second fixing slot, a third fixing slot and a fourth fixing slot that are located at a side away from the base plate in sequence. The first fixing slot has a first width. The second fixing slot has a second width. The third fixing slot has a third width, and the fourth fixing slot has a fourth width. The filling component is filled in the air flow channels. The first width is the same as the third width. The first width, the second width and the fourth width are different from one another.

Abstract: Provided are a blower, capable of suppressing noise occurring in a stator while significantly improving blowing efficiency, and an outdoor unit using the same. The present disclosure comprises: a bell mouth part spaced apart at a predetermined distance in the radial direction with respect to an outer circumferential end of a propeller fan; and a diffuser part installed on the downstream side of the bell mouth part, and having a flow path area which is enlarged from the upstream side toward the downstream side with a larger magnification rate than the magnification rate of the flow path area in the downstream end of the bell mouth part; and a stator part having a plurality of stators, wherein the stator part is arranged within the diffuser part.

Abstract: An air flow-enhancing insert (30) is configured to be inserted into the air inlet (16) of a compressor (3). The insert includes a hollow, cylindrical inner member (32) and lugs (44) protruding outward from an outer surface (36) of the inner member, each lug having an elongated cross sectional shape and including a leading edge (46), a trailing edge (48), and a long axis (50) that extends between the leading edge and trailing edge, the long axis defining a helix about the outer surface. When the insert (30) is disposed in the compressor air inlet, an air recirculation path (20) is defined between the inner member outer surface, an inner surface (17) of the air inlet, and the lugs. The air recirculation path improves air flow in the compressor, whereby compressor efficiency is improved and noise is reduced.

Abstract: The invention discloses an air outlet protection structure, an outdoor unit of an air conditioner and a method for designing an air outlet protection structure. The air outlet protection structure comprises: a central circular disk (10); and a radiating rib (20), extending from an outer edge of the central circular disk (10) to a direction away from the central circular disk (10). An included angle between a first side surface (21) of the radiating rib (20) and a central axis of the central circular disk (10) is a, as formula (I). The invention is determined according to the characteristics of a flow field of an air duct, and can reduce the hindering effect of an air outlet protection apparatus on a fluid as far as possible, thereby improving the air output volume of a fan and reducing the noise of the entire outdoor unit of the air conditioner.

Abstract: A double-loop control system with a single hydraulic motor relates to a technical field of hydraulic transmission control, including a hydraulic motor (1), a positive control loop (2), a negative control loop (3), a hydraulic pump (4), an accumulator (5), and an oil tank, wherein the hydraulic motor (1) adopts a unique thrust structure with four inlet/outlet ports; the positive control loop (2) and the negative control loop (3) independently control the hydraulic motor (1), wherein the positive control loop (2) and the negative control loop (3) drive together or only one drives; or braking kinetic energy and potential energy of loads are stored in the accumulator (5) for energy recovery. The present invention uses only one hydraulic motor for satisfying different work conditions and different load driving requirements with advantages such as simple structure, high system reliability and high energy efficiency.

Abstract: A hydraulic actuator having a body defining a chamber, a piston rod including an annular groove and a piston head slidably housed within the chamber, the piston head having a number of segments each of which has a base portion mounted within the annular groove.

Abstract: An electromagnetically operated powertrain system is provided. The system includes a plurality of cylinder assemblies arranged in parallel at least partially along a vehicle. Each of the cylinder assemblies may include one or more cylinders, one or more electromagnetic devices secured to at least one of the ends of each cylinder, one or more pistons reciprocatingly received in the cylinders, and a piston rod coupled to the pistons. Each of the pistons includes a permanent magnet that creates a magnetic field interacting with an electromagnetic field generated by each of the electromagnetic devices. A pulling and/or pushing force may be selectively generated by the magnetic field and the electromagnetic field to enable the pistons to reciprocate within the cylinders. A crankshaft is coupled to the piston rods of the plurality of cylinder assemblies and directly coupled to at least one of front and rear axles of a vehicle.

Abstract: A fastener for a vehicle lamp assembly has an adjustable stud and grommet. Positioning grooves on the stud interact with positioning fingers on the grommet in a ratcheting fashion to allow more accurate alignment of the lamp assembly prior to securing the lamp assembly to a vehicle.

Abstract: The present invention relates to a panel clamp securable to a variety of mounting mechanisms. The clamp includes first and second members, each having an edge extending beyond at least a portion of its side surface to form an overhang, and each includes a plurality of holes passing therethrough. When the overhang of the first member is fitted over a top surface of a panel and the overhang of the second member is fitted over a bottom surface of the panel, such that the plurality of holes in the first member is substantially aligned with the plurality of holes in the second member, mechanical fasteners can be inserted through the plurality of holes to secure the first and second members to the panel. An additional mechanical fastener is inserted through the clamp to secure the clamp to a mounting mechanism.

Abstract: A self-clinching fastener suitable for connection to a member having a shank of a diameter less than a head portion, the head portion having at least eight lands extending outwardly along the underside of the head portion spaced about the shank, each land having a face surface extending beyond the shank to a diameter less than or equal to the radius of the head portion, the width of the lands reducing from adjacent the shank toward the radius of the head portion. The fastener further includes an axial annular engagement groove having a diameter larger than the shank, the annular engagement groove axially extending from the lands to a retaining collar adjacent the shank, the groove adapted to relieve material of a member on installation by receiving material as the lands in the underside of the head portion mechanically interlock with the member.

Abstract: An embodiment provides a fastener including a locking member and a pin member which are connected. The locking member has a pair of leg portions that are inserted into the mount hole and a flange portion that is brought into abutment with a portion of the mount-base member that lies on a circumference of the mount hole. The pin member has a head portion that is connected to the flange portion and an extending portion that extends from a rear side of the head portion. When the head portion of the pin member is forced into the locking member, a connection between the flange portion and the head portion is released, and the extending portion travels between the pair of leg portions to expand open the pair of leg portions or to restrict the pair of leg portions from moving towards each other.

Abstract: Screw for introducing into an underground, comprising a screw shaft and a screw head which is adjoining the screw shaft, in which a drive is formed for rotary driving the screw by a drive element, wherein the drive comprises a hollow wing section at an outer side of the screw with a circular hollow core and hollow wings which are provided along the circumference, wherein the drive comprises a hollow recess section at an inner side of the screw, and wherein the drive at a transition between the hollow wing section and the hollow recess section comprises a chamfer section whose outer surface is angled with respect to an outer surface of the hollow wing section and with respect to an outer surface of the hollow recess section.

Abstract: A fastener may include an elongated shank, a head at a distal end of the shank, and a drill point at a terminal end of the shank, which is opposite to the distal end. The fastener may include a primary thread starting at the drill point and extending along the shank towards the head. The fastener may include a secondary thread starting at the drill point, extending along the shank towards the head, and stopping in an axial direction before the primary thread ends. The secondary thread may be radially located 180 degrees from the primary thread. The drill point may include a plurality of radially extending cutting edges and one or more relieved flute portion extending along the surface of the drill point.

Abstract: A breakaway nut fastener is provided having a hybrid construction of plastic and metal. The breakaway nut fastener includes a head portion and a nut portion connected by a thin walled section. The head portion is made of plastic and has a shape so as to mate to a tool. The nut portion has an exterior shell having a cavity for receiving a nut insert. The nut portion's exterior shell is made of plastic while the nut insert is made of metal. The breakaway nut fastener's thin walled section is also made of plastic joining the breakaway nut fastener's head portion and the nut portion's exterior shell. The thin walled section is made of plastic, and preferably the head portion, nut portion and thin walled section are constructed as one part forming a single component of plastic.

Abstract: A fastener with a locking mechanism includes an elongated bolt member with threaded segment defining a banking feature and generally planar surfaces, a nut member, a washer member, and a lock member. The nut member has a threaded bore for cooperating with the threaded segment of the bolt member and a peripheral edge with a flat side defining an axial slot. The washer member has a central bore with a banking portion that complements the banking feature of the bolt member such that, when the threaded segment is inserted in the central bore, the washer member moves axially and is rotatably fixed relative to the bolt member. The washer member has an axially projecting circumferential wall with radially inward facing engagement teeth for intermeshing with teeth of the lock member. The lock member has a spring finger upstanding from the annular body that is received in the axial of the nut member for fixing the lock member in rotation relative the nut member.

Abstract: A sealing rubber 24 is integrally molded to an outer peripheral face 20B and a lower face 20C of a flange portion 20 of a collar 16, and a protruding portion 28 is continuously formed along the circumferential direction around a through-hole 14A in an upper face 14B of a resin member 14.

Abstract: The present invention consists in a 3-in-1 fastening system for shells of mill liners used for grinding minerals allowing the quick installation and removal in one step by using conventional tools. The system comprises a metal washer (1), a fastening element (2, 200) and a rubber washer (5), being concentrically joined to be coupled and thereby securing the shell of a mill, wherein the metal washer (1) has one or more inner openings (3) receiving one or more retaining members (4) to retain the fastening element (2, 200) inside said metal washer (1).

Abstract: A vacuum suction device is disclosed. The vacuum suction device includes a suction member that is brought into vacuum-suction contact with an attachment surface by a vacuum chamber formed therein and an adjustment member that is coupled to the suction member to form the vacuum chamber. The suction member includes a first hard-material portion that is coupled to the adjustment member and that is raised by the adjustment member, a deformable portion of which one end is connected to an end of the first hard-material portion and that is deformable in shape, and a second hard-material portion that is connected to the other end of the deformable portion to support the deformable portion and is located outside the first hard-material portion.

Abstract: A method of manufacturing a hollow drive shaft for a vehicle may include swaging one of a first hollow tube and a second hollow tube having a same diameter to reduce an outer diameter thereof and thus allow the swaged hollow tube to be assembled in a remaining hollow tube of the first hollow tube and the second hollow tube, assembling the hollow tube that is reduced in outer diameter in the remaining hollow tube, thereby forming a hollow shaft, and joining first and second stems to both sides of the hollow shaft, respectively.

Abstract: A hybrid metal-composite drive shaft unit, which comprises at least one metal drive shaft connector that is at least partly embedded into a composite drive shaft, the composite drive shaft comprising a thermoplastic polymer and being connected to the at least one metal drive shaft connector by means of a welded connection that defines a first load path for transmission of loads between the at least one metal drive shaft connector and the composite drive shaft, the at least one metal drive shaft connector and the composite drive shaft comprising, in the region of the welded connection, at least partly a polygonal cross-sectional shape for forming a form-fit connection that defines a second load path for transmission of loads between the composite drive shaft and the at least one metal drive shaft connector.

Abstract: A connecting rod for an internal combustion engine having an adjustable length between a first connecting rod eye and a second connecting rod eye. An eccentric member having a bearing bore which is positioned eccentrically to an outer diameter is rotated to adjust the length. The eccentric member is rotated by a rack and pinion drive and a double acting hydraulic cylinder.

Abstract: The machine for cracking a connecting rod comprises an electro press with an electric motor (400) for actuating an expandable element. The electro press comprises a first S actuator part (410) and a second actuator part (430) arranged so that when the first actuator part is driven by the electric motor (400) from a first position to a second position, (a) the first actuator part (410) is first driven by the electric motor (400) from said first position (FIG. 12A) to an intermediate position (FIG. 12B), without displacing the second actuator part (430), and (b) subsequently the first actuator part (410) is further driven by the electric motor (400) from said intermediate position (FIG. 12B) to said second position (FIG. 12C), displacing the second actuator part from a non-expanding position to an expanding position.

Abstract: Provided is a fluid dynamic bearing device (1), including: a bearing sleeve (8) made of sintered metal; a rotary member (2) including a shaft portion (21) and a hub portion (23); and first and second thrust bearing portions (T1, T2) that form thrust bearing gaps respectively on an upper end surface (8b) and a lower end surface (8c) of the bearing sleeve (8) along with rotation of the rotary member (2). At least an outer peripheral surface of the bearing sleeve (8) is subjected to pore sealing treatment. A sealing gap (S) for retaining an oil surface of lubricating oil is made along a tapered outer peripheral surface (8d1) of the bearing sleeve (8). A lid member (10) having a bottomed cylindrical shape being fixed to an outer periphery of a lower end of the bearing sleeve (8).

Abstract: A steering bearing for bearing a steering column of a motor vehicle, including an inner ring and an outer ring having respective raceways on which balls roll, the outer ring being enclosed by a sleeve in which a spring ring is arranged. The spring ring tensions the balls against the respective raceways and the balls roll on said spring ring.

Abstract: A center supporting device for a propeller shaft of a vehicle may include an inner bearing device configured to axially movably support a stub shaft, the stub shaft being connected between a front shaft and a rear shaft of the propeller shaft, an outer bearing device mounted outside the inner bearing device to axially rotatably support the stub shaft, and an insulator mounted in an elastically deformable manner between the outside of the outer bearing device and a bracket fixed to a vehicle body.

Abstract: A linear guide 10 includes: a track rail 20 having a ball rolling groove 22; a movable block 30 having a loaded ball rolling groove 33 opposing the ball rolling groove 22, an unloaded ball rolling groove 34 extending in parallel with the direction in which the ball rolling groove 22 extends, and a direction change guide groove 35 connecting the loaded ball rolling groove 33 and the unloaded ball rolling groove 34; and a plurality of balls 40 arrayed on an endless circulating path including a loaded ball rolling path 50, an unloaded ball rolling path 60, and a direction change path 70 formed by the track rail 20 and the movable block 30. The direction change path 70 has a plurality of change points where the track changes. By having this configuration, it is possible to provide a linear guide which does not require an end plate.

Abstract: There are provided: a linear motion guide device, which enhances workability of raceway surfaces and is capable of reducing production cost; and a production method for the linear motion guide device. For this purpose, a linear motion guide device includes a guide rail (1), a slider (2), and a plurality of rolling elements (4), and the guide rail (1) and the slider (2) individually have raceway surfaces (11, 21), which form a rolling path (3) of the rolling elements (4), at positions opposite to each other. Then, the rolling elements (4) are disposed in the rolling path (3), and the slider (2) moves with respect to the guide rail (1) via the rolling elements (4).

Abstract: A superconductor-magnet bearing system can include a first bearing portion and a second bearing portion. One of the first and second bearing portions can be at least partially composed of a high-temperature superconductor (HTS) and another can be at least partially composed of a magnet. The first bearing portion can be disposed at least partially within an opening of the second bearing portion with a gap between the first and second portions. A magnetic bearing portion can include a plurality of rings disposed next to one another. An HTS bearing portion can include a magnet. The bearing portions can be biased toward an alignment with one another. One bearing portion can rotate relative to another bearing portion.

Abstract: A method for lubricating a generator bearing assembly is presented. The generator bearing assembly has a bearing and a bearing seat that supports the bearing. A coating of a lubricating material is applied at an interfacing surface between the bearing and the bearing seat. A curing process is performed to the coating by heating the coating up to a predefined curing temperature.

Abstract: The invention relates to a rolling element bearing having at least one inner bearing inner and at least one outer bearing ring. Rolling elements are arranged between the inner ring and the outer ring, and the rolling elements are guided by a cage. To improve the lubrication of the bearing the invention proposes that the cage includes at least one opening, preferably a bore. The opening penetrates the cage from a radial inner surface to a radial outer surface.

Abstract: The invention relates to an antifriction bearing cage including cage pockets that are used for guiding rolling elements, in particular balls, and are formed by two lateral rings having a common axis of symmetry (R) and by webs interconnecting the lateral rings. The lateral rings are designed as single pieces along with the webs and contain a fabric. According to the invention, the fabric is composed of at least two types of different fibers which impart highly anisotropic properties to the fabric.

Abstract: Pillar parts (10) are connected to the inner peripheral surface (5b) of a large-diameter rim part (5) and to the outer peripheral surface (7b) of a small-diameter rim part (7). The inner peripheral surface (5b) of the large-diameter rim part (5) and the outer peripheral surface (7b) of the small-diameter rim part (7) 5 respectively have axial-direction inside portions (5c), (7c) overlapping with the pillar parts (10) in the axial direction and axial-direction outside portions (5d), (7d) not overlapping with the pillar parts (10) in the axial direction. A small-diameter annular member (2) is internally fitted in the axial-direction outside portion (5d) of the inner peripheral 10 surface (5b) of the large-diameter rim part (5). A large-diameter annular member (4) is externally fitted in the axial-direction outside portion (7d) of the outer peripheral surface (7b) of the small-diameter rim part (7).

Abstract: The invention is a joint site design for friction welding of a shaft of a hard material with a hub consisting of softer material, wherein the shaft has a tubular shape with an end face being joined to the hub having a connection area with a flat shape formed by a radial shoulder of the hub.

Abstract: A tubular device for connection to a shaft such that a torque can be transmitted between the tubular device and the shaft comprises a hollow receiving region configured to receive a first supporting region of the shaft, and at least one first torque-transmitting section configured to engage with at least one second torque-transmitting section of the shaft. The hollow receiving region includes at least one contact surface configured to engage at least one first supporting region of the shaft when the tubular device is radially mounted to the shaft. The at least one first torque-transmitting section includes at least one bump which, starting from the at least one first contact surface, projects into the hollow receiving region and is positioned immovably on the tubular device.

Abstract: An Oldham coupler assembly for transferring rotary power between two shafts in an imaging device. The Oldham coupler includes an input plate and an output plate made of plastic and a star plate made of metal mechanically coupled and positioned in between the input plate and the output plate. A plastic retraction spline assembly is slidably retained in the output plate and engages with a drive member in an imaging unit. The location of the retraction spline assembly on the output plate allows for an increased diameter leading to increased torsional stiffness. The input plate includes gear teeth integrally molded into the outer circumference thereof helped to decrease the overall width of the Oldham coupler. Pairs of wheels are fastened to inner faces of the input and output plates and used to moveably couple the star plate to the input and output plates.

Abstract: A dual mass flywheel includes a first flywheel part arranged for rotation on an axis, a second flywheel part arranged for rotation on the axis, and a torsional damper that is connected to the first flywheel part and the second flywheel part. A linkage is connected to the first flywheel part and includes a first joint that is movable from a first position, in which a first joint of the linkage is in an over-center condition, to a second position. An engaging member is connected to the linkage such that the engaging member engages the second flywheel part when the linkage is in the first position and disengages from the second flywheel part when the linkage is in the second position.

Abstract: A coupling comprises a pair of members: a first member having an outer convex spherical periphery centred about a central point and a torsional axis extending through the central point, and a second annular member has an inner concave spherical periphery centred on the central point and complementary to the outer periphery of the inner first member. The spherical surfaces of the inner and outer members co-act to transmit radial loads and loads acting along the common. Axles extend radially of the central point and couples the first and second annular for transmitting torsional load from one to the other. The each of the pair of members is rotatable one relative to the other about the said central point in a direction constrained by the axle arrangement.

Abstract: The invention provides a grease composition for constant velocity joints, which contains (a) a base oil, (b) a diurea thickener, (c) benzotriazole and/or a derivative thereof, and (d) a phosphate and/or an amine salt thereof; and a constant velocity joint where the grease composition is packed.

Abstract: A torque limiter unit includes a first metal member and a second metal member (pressure plate, cover plate) pressed against the first metal member with a predetermined pressure, and is configured such that the first metal member and the second metal member are slid relative to each other against a frictional force generated between the first metal member and the second metal member. Further, the first metal member includes, as a sliding surface, a first coating layer including a 3d transition metal-containing compound, and the second metal member includes, as a sliding surface, a second coating layer including a 3d transition metal-containing compound.

Abstract: A shaft assembly comprises a first shaft portion, connected to a second shaft portion by a flexible coupling. The first shaft portion is further connected to the second shaft portion by a frangible coupling with the frangible coupling being configured to fail if a torsional load through the frangible coupling exceeds a predetermined maximum torsional load. The flexible coupling allows an angular misalignment between the first and second shaft portions not exceeding a maximum angular misalignment.

Abstract: A disconnect shaft of an integrated drive generator is provided including a body configured to rotate about an axis of rotation. The body has a first end, a second opposite end, and a plurality of teeth formed adjacent the first end and configured to engage a complementary portion of an adjacent component. A relief is formed in the body such that a first portion is defined between the relief and the plurality of teeth. The first portion includes a plurality of threads having at least one of a major diameter between about 1.3044 and about 1.3125 inches (3.313-3.334 centimeters), a minor diameter between about 1.2482 and about 1.2547 inches (3.170-3.187 centimeters), a pitch diameter between about 1.2765 and about 1.2800 inches (3.242-3.251 centimeters), and a root radius between about 0.0075 and 0.0090 inches (0.0190-0.0029 centimeters).

Abstract: A two dimensional structure such as a disk or belt is shaped or distorted to form a buckling wave. At least one contact touches the wave, two contacts squeezing the wave between them providing a firmer connection. The wave is propagated along the structure by any of a variety of means including magnets or piezo actuators. This movement of the wave moves the contacts relative to the two dimensional structure, providing a high leverage ratio.

Abstract: A two dimensional structure such as a disk or belt is shaped or distorted to form a buckling wave. At least one contact touches the wave, two contacts squeezing the wave between them providing a firmer connection. The wave is propagated along the structure by any of a variety of means including magnets or piezo actuators. This movement of the wave moves the contacts relative to the two dimensional structure, providing a high leverage ratio.

Abstract: The invention relates to an actuator (13) for actuating a piston (17) of a hydraulic clutch actuator and how said el actuator (13) can be used in a hydraulic system of an electrically actuatable clutch system for a motor vehicle. An electric motor (11) drives an actuating disc (55). A slotted guide structure (31) is arranged on the actuating disc (55). The slotted guide structure (31) forms a contact surface (33), the radius (r) of which increases in relation to an axis (65) from a minimum radius point (35) to a maximum radius point (37). An actuating rod (41) is engaged with a piston (17) of the clutch actuator and is supported on the first slotted guide structure (31) and guided in such a way that, with one rotation of the actuating disc (55), a pressure is exerted on the actuating rod (41) by the first slotted guide structure (31).

Abstract: A selectable one-way clutch comprises inside clutch elements and outside clutch elements. The inside clutch elements include: an inside pocket plate where inside pawl members are held; an inside notch plate where inside recesses to engage with the inside pawl members are formed; and an inside selector plate disposed between the inside pocket plate and the inside notch plate. The outside clutch elements include: an outside pocket plate where outside pawl members are formed; an outside notch plate where outside recesses to engage with the outside pawl members are formed; and an outside selector plate disposed between the outside pocket plate and the outside notch plate. The inside clutch elements and the outside clutch elements are disposed concentrically using one axial line as a center.

Abstract: A control assembly of an internal clutch comprises a first control unit for controlling the fixedness of a sun gear; a second control unit for controlling engagements of inner gears at two sides and a planet frame; a third control unit for controlling the sun gear or the inner gears and the planet frame; and wherein power for control units are from rotary dynamic components, by displacements of driving rods for controlling operations of a cam or cam-like component; by using the cam or cam-like unit to function clutch or by using the cam or cam-like unit to drive a driven device to rotate or displace for operation of the clutch. By power rotating components of the internal clutch and cam or cam-like component, clutching components are controlled.

Abstract: A torque limiting tool is described. The tool comprises a two stage torque limiting mechanism that resides within a housing. The torque limiting mechanism comprises a shank positioned through a gear, a plate, and a bias member. The plate is constructed having at least one post and at least one tooth providing a ramp surface that extends outwardly from a plate surface. The gear is constructed having at least one recess providing at least one inclined surface that resides part-way within the thickness of the gear. The gear and plate are positioned in opposition so that the at least one tooth and extending post are received within or detachably mated to the opposing recess and through-bore. Torque is transferred therebetween the plate and gear when the ramped teeth and extending posts mate with the respective recess and through-bore. A first torque limit is exceeded when the post breaks free from the through-bore. A second, lesser torque limit is exceeded when the ramped teeth release from their mated recess.

Abstract: A brake disc (401) for a vehicle is shown. The brake disc has a hub (403) to be secured to a wheel or an axle of a vehicle, such that it will rotate about an axis (B). The brake disc also has a brake member (402) comprising an annular friction ring (501) having an inner radius (503) and an outer radius (504), and an axially extending hollow cylindrical flange (502) having an inner surface and an outer surface. The hub is a casting which extends over both the inner surface and the outer surface of the flange. The hub is formed of a first material and the friction ring is formed of a second material, and the first material has a lower density, a lower melting point, and a higher coefficient of linear thermal expansion than the second material.