Abstract: Segmented sprocket systems and methods for installing the segmented sprocket systems for use in numerous different applications such as, but not limited to, industrial sprockets. The present invention may be a segmented sprocket system including two or more relatively thin sprockets (100) that are installed together on a common hub (200) such that the two or more sprockets form a composite sprocket having a width approximately equal to the sum of the width of the individual sprockets. A segmented sprocket system may include a hub; at least two sprockets having the same outer diameter and an interior opening having a diameter approximately equal to the outer diameter of the hub; wherein the at least two sprockets are positioned on the hub such that each sprocket abuts a neighboring sprocket, thus resulting in a composite sprocket structure.

Abstract: An instrument holder generally includes a carriage support having an output drive and a carriage configured to removably couple an instrument thereto, the carriage may have a lateral opening extending radially outward from a central axis of the carriage, and the lateral opening may be configured to receive a portion of the instrument therein. The carriage may further include a positioning member disposed on an outer surface of the such that rotation of the output drive changes an angular position of the carriage relative to the carriage support. The positioning member may be configured to allow the output drive to operably couple with the carriage at an engagement point adjacent to the lateral opening. The carriage may include a positionable door or a fin extending into the lateral opening to allow the output drive to drive the carriage around a full 360 degree rotation or greater.

Abstract: Gear mechanism (1) having a toothing (5), a tooth carrier (11) accommodating a plurality of teeth (7) for engagement with the toothing, the teeth (7) being radially displaceable relative to the tooth carrier (11), a drive input with a profiling (22) for radially driving the teeth (7), and bearing segments (24) for mounting the teeth on the profiling. Each bearing segment includes a running side oriented in the direction of the profiling and a bearing side opposite the running side, a tooth bearing arranged on the bearing side for articulated mounting of at least one of the teeth, the tooth bearing including a bead which is at least substantially in the shape of a cylinder section and arranged from a first side edge to a second side edge of the bearing segment transverse to a running direction of the bearing segment. The bead is in a central region between the first and second side edges and has a first and/or second recess on a first and/or second side of the central region.

Abstract: A lay shaft assembly for a speed reduction gearbox in a geared turbofan gas turbine engine, the lay shaft assembly having an output gear formed on a lay shaft as a single piece, and an input welded gear formed as a separate piece that is welded to the shaft in close proximity to the output gear. The output gear is machined and precision-ground prior to welding the input welded gear to the lay shaft so that the two gears can be located in close proximity. The input welded gear is precision-ground after the gear has been welded to the shaft.

Abstract: A worm gear for a worm gear mechanism of a motor vehicle steering system includes a carrier body and a multiplicity of teeth with tooth surfaces. The teeth point radially outward and the carrier body is formed from a plastic including reinforcement fibers and has a multiplicity of ribs with rib surfaces which point radially outward from a central encircling ring-shaped web of the worm gear. The teeth are applied to the ribs of the carrier body by injection molding, and the reinforcement fibers are oriented, wherein the multiplicity of reinforcement fibers, in terms of their orientation, follow the adjacent rib surfaces of the carrier body and/or the adjacent tooth surfaces of the teeth.

Abstract: Adapter plates for mounting accessories to a gearbox of a turbine engine are described herein. The adapter plates may be inverted to mount with various equipment, such as a variable frequency generator, oil pump, a fuel pump, a hydraulic pump, an alternator, an electrical generator, and a starter. Gear shafts may comprise splines in a particular form/shape for mating with the gears. The gears may be inverted to expose a desired spline configuration.

Abstract: A table saw includes a table assembly having a top surface, a cutting assembly, and an adjustment assembly. The cutting assembly is arranged below the table assembly and is movable relative to the top surface. The adjustment assembly includes an input member connected to a first gear and an output member connected to a second gear and to the cutting assembly. The first and second gears include first and second gear bodies and first and second pluralities of pins projecting from the gear bodies. Rotation of the input member causes rotation of the first gear about a first axis, and rotation of the second gear about a second axis causes rotation of the output member which causes the cutting assembly to move. The second pins engage the first pins in such a way that rotation of the first gear causes rotation of the second gear.

Abstract: A drive sprocket assembly is provided. The drive sprocket assembly includes at least one first segment and at least one second segment. Each of the at least one first segment and the at least one second segment is adapted to be removably affixed to a hub of the drive sprocket assembly. Each of the at least one first segment and the at least one second segment includes a top surface and an inner surface extending away from the top surface. The inner surface includes a stepped configuration. The inner surface is adapted to at least partially abut a raised portion of the hub and an outer surface of the hub. The drive sprocket assembly also includes a tooth segment provided on the top surface of each of the at least one first segment and the at least one second segment respectively.

Abstract: A chainring for a bicycle includes a body and a plurality. The plurality of teeth are disposed about a periphery of the body. The plurality of teeth have a tooth body formed of a first material and include a load flank. The plurality of teeth also include an insert formed of a second material. The insert is coupled to a tooth body of the plurality of teeth forming a load flank surface of the plurality of teeth.

Abstract: A system for a wind turbine rotor blade, the system includes a pitch system that has a pitch bearing and a wind turbine hub, the bearing being attached to the hub and being attachable to a wind turbine rotor blade, and also including a pitch gear coupled to the pitch system. The pitch gear includes a first discrete segment and one or more other discrete segments, each segment having a plurality of teeth for engaging with and actuator such as a pinion. At least the first segment is held in place by releasable fasteners and extends along the pitch gear by a predetermined amount. The predetermined amount that the first segment extends along the pitch gear is determined based on anticipated wear of the pitch gear.

Abstract: A chainring includes a first section having consecutive first teeth. Each of the first teeth includes a first load flank surface having a first wear resistance. The chainring also includes a second section coupled to the first section. The second section includes consecutive second teeth. Each of the second teeth includes a second load flank surface having a second wear resistance greater than the first wear resistance. The consecutive second teeth span an arc length corresponding to between one twelfth and one third of a circumference of a pitch circle of the chainring.

Abstract: Each generic gear includes one tooth disposed in each of the sockets, and each tooth extends radially outward from one of the sockets and throat thereof. The teeth of the generic gear include resilient material adjacent the throat for compressing and allowing movement of each tooth relative to the outer periphery. In the species of FIG. 1, each tooth is entirely of the resilient material and diverges or circumferentially widens from adjacent the throat to define a gap from the throat to the outer periphery. In the species of FIG. 2, each tooth has a shell integral with the hub and a core of the resilient material fills each shell and extends into the socket to define a crescent-shaped gap with the socket end.

Abstract: A double thread screw includes a mandrel, a plurality of threaded blocks mounted on the mandrel, and two ends stops mounted on the mandrel. The mandrel has a periphery provided with a plurality of locking faces. The threaded blocks are clamped between and limited by the ends stops. Each of the threaded blocks has a central portion provided with a locking hole locked onto the locking faces of the mandrel. Each of the threaded blocks has a periphery provided with two first thread grooves which intersect each other and have two opposite threading directions. The first thread grooves of the threaded blocks are combined to form two intersecting threads which are arranged successively in a staggered manner and are directed in two opposite threading directions.

Abstract: One object is to provide a gear to be included in a fishing reel to produce excellent rotation feeling while reducing the weight relative to the strength. In accordance with one aspect, a drive gear included in a fishing reel is formed of a circumferential part having tooth surfaces and a body part radially inside the circumferential part which are made of different materials and integrated together. These materials satisfy the following conditions: S1>S2, P1>P2, and F1<F2, where S1 and S2 represent material strengths, P1 and P2 represent material densities (specific gravities), and F1 and F2 represent vibration damping capacities for the circumferential part and the body part, respectively.

Abstract: A scissors gear may include a main gear and a sub-gear co-axially combined by a scissors spring therebetween to integrally rotate, a first oil supply hole formed in the main gear or the sub-gear to supply oil from the outside, an oil groove formed in the sub-gear or the main gear to receive the oil by being selectively communicated with the first oil supply hole, and a check valve that is disposed in the main gear or the sub-gear to open/close the oil groove.

Abstract: A resin rotating body 1 is configured by a ring-shaped resin ring 2, and a metallic bush 3 which is fitted to an inner circumferential surface 2a of the resin ring, and projections 3a as rotation preventing means that connects the resin ring and the metallic bush so that the resin ring and the metallic bush do not rotate with respect to each other are provided on an outer circumferential surface of the metallic bush. The resin ring is molded by heating and compressing an element body in which a plurality of sheet-shaped resins manufactured by sheet making are stacked in layers in an axial direction and a diameter of the inner circumferential surface is formed to be substantially the same diameter as the outer circumferential surface of the metallic bush, and the metallic bush is integrally connected to the resin ring by being press-fitted to the inner circumferential surface of the element body along the axial direction.

Abstract: A toothed gear wheel with toothed wheel body and exchangeable teeth is disclosed. One or more teeth are embodied as a component which is able to be detachably connected to the toothed wheel body of the toothed gear wheel. A transmission embodied with the toothed gear wheel is disclosed. A component with suitable for use in a toothed gear wheel with toothed wheel body is also disclosed.

Abstract: An apparatus for connecting a steering column control module to a steering column of a vehicle comprises a bracket for mounting the steering column control module and a collet for interconnecting the bracket and the steering column. The collet snaps into engagement with the bracket and with the steering column. One of the bracket and the collet includes a first projection and the other of the bracket and the collet including a recess for receiving the first projection. The recess includes a second projection for engagement with the first projection when the first projection is received in the recess.

Abstract: A variable diameter gear device for variable ratio transmission systems has a displaceable gear tooth sequence formed from interconnected gear teeth with uniform pitch lying on a virtual cylinder coaxial with an axle of the device. A torque linkage transfers a turning moment between the axle and the gear tooth sequence. A diameter changer includes at least one disc with a spiral track to which each of the gear teeth is linked. Rotation of the discs relative to the axle causes variation of an effective diameter of the virtual cylinder while the gear tooth sequences remain on a virtual cylinder centered on the axis and the uniform pitch remains constant.

Abstract: A sector gear split into sections for secure engagement around a tripper shaft, allowing the gear to be replaced in less time, by a smaller crew, and with fewer tools.

Abstract: An ice-cube complete filling detector and a refrigerator comprising the same comprise a cam, an arm lever rotated by the cam, a detector driving gear rotated by the arm lever, a detector driven gear rotated by the detector driving gear, and an ice-cube detection lever connected to the detector driven gear, so that the detector driven gear is rotated via gear engagement by the detector driving gear and the detector driven gear, and the ice-cube detection lever can be rotated in a large range of about 180 degrees, thereby ensuring high accuracy of detection.

Abstract: In a gearing, in particular coaxial gearing, hollow shaft gearing, hypoid gearing, axial gearing or linear gearing, with a driving element (7), an element (3) and an output element (11), a stepping-up and transmission of a driving torque between driving element (7) and output element (11) are to take place via a plurality of movable tooth segments (5).

Abstract: In an apparatus for clamping and releasing a gearwheel rim with respect to a main gearwheel that bears the gearwheel rim, a clamping apparatus includes an axially guided, displaceable clamping plate clamping the gearwheel rim between the plate and the main gearwheel. Antifatigue bolts are used for such a purpose. The bolts are expanded by an actuator for releasing the clamped gearwheel rim to an extent that cancels the clamping action.

Abstract: A driving element is divided into two coaxial toothed members elastically attached to one another. A first of the toothed members is fixed to a shaft. The second of the toothed members is freely mounted on this shaft. The second toothed member has a planar face, opposite and facing away from the first toothed member. That face has seats arranged around the shaft to receive first respective ends of deflection rods. The rods extend, with the shaft, outside of the toothed member. A flange has an axial passage for receiving an end of the shaft. The flange has seats for receiving second respective ends of the deflection rods. A device for clamping the flange on the end of the shaft and in an angular position around the shaft fitted to apply a deflection stress to the rods.

Abstract: A roller track for a roller screw is formed on a screw and a nut of the roller screw respectively, and the roller track is similar to a V-shaped structure. Round angles with the same radius are formed on the outer edges for contacting rollers. Thereby, the roller chain of the present invention can avoid the two problems of the stress centralization of the rollers and the excessively small contact length of the rollers, further to lift the load capability of the roller screw.

Abstract: An electric power steering device having a resin gear used in a speed reduction gear mechanism and the resin gear used for the device are provided. The speed reduction gear mechanism includes a driven gear that is the resin gear integrally formed by fitting a resin part having gear teeth formed on the outer peripheral surface thereof to the outside of a metal core and a drive gear meshed with the driven gear. The resin part of the resin gear is formed of a resin composition having, as a base resin, a polyamide resin containing 10 to 50% by weight of glass fiber of 5 to 9 ?m in diameter, and has excellent wear resistance, durability, and dimensional stability. Grease on the meshed surfaces of the gears has such a composition that includes a thickener and 3 to 10% by weight of a wax having a melting point or softening point in the range of 70 to 130° C. in a base oil formed mainly of at least one oil selected from mineral oil, poly ?-olefin oil, and alkyl polyphenyl ether.

Abstract: An image forming apparatus includes a chassis, a motor, a drive transmission gear that receives rotational force from the motor, a feed roller rotatably supported by the chassis, an intermediate gear that has a circular bearing, receives rotational force from the drive transmission gear, and transmits rotational force to the feed roller gear, and a gear support axle that is inserted through the bearing of the intermediate gear for rotatably supporting the intermediate gear. The gear support axle is provided with a bearing engagement part. The bearing engagement part has at least one flat section, at least one circular section, and at least two support portions formed between the flat section and the circular section, such that the gear support axle is supported by the bearing at at least one of the two support portions.

Abstract: A gearwheel unit includes a gear body and a clutch gear. The gear body includes a gear part and a positioning part. The gear part is configured and arranged to transmit rotation of a rotational shaft with a prescribed change gear ratio. The positioning part is integrally formed with the gear part at a position spaced apart from the gear part by a prescribed distance in an axial direction so that a prescribed open space is formed between the positioning part and the gear part. The clutch gear is fixedly coupled to the gear body as being positioned with respect to the gear body by the positioning part so that at least a part of the clutch gear overlaps the prescribed open space formed between the positioning part and the gear part of the gear body when viewed in a radial direction.

Abstract: Poor appearances, such as burns, black streaks, and short shots, that tend to occur near an outer circumference side edge of a tooth crest when a resin face gear is formed by injection molding, as a result of gas within a cavity not being smoothly discharged, is prevented. A projecting section is formed on an outer peripheral surface of teeth and on an outer peripheral surface of a web in a resin face gear, projecting in an outward radial direction. A parting line of a mold is formed passing through a peak formed near a tooth crest edge on the projecting section.

Abstract: A gearing system using modular gear bearing components. Each component is composed of a core, one or more modules attached to the core and two or more fastening modules rigidly attaching the modules to the core. The modules, which are attached to the core, may consist of gears, rollers or gear bearing components. The core orientation affects the orientation of the modules attached to the core. This is achieved via the keying arrangement of the core and the component modules that attach to the core. Such an arrangement will also facilitate the phase tuning of gear modules with respect to the core and other gear modules attached to the core.

Abstract: A moving member fixing apparatus includes a stationary gear, rotary gear, press member, and first and second flat inclined surfaces. The rotary gear is movably provided to the stationary gear. The press member presses the rotary gear to fix the rotary gear to the stationary gear, and cancels pressing the rotary gear so that the rotary gear is released from the stationary gear. The first flat inclined surface is formed to be associated with the stationary gear.

Abstract: A sector gear is formed as one of a pair of mirror image gears (12, 14). Each of the sector gears has an arcuate portion (16) having a series of teeth (18) on an outer periphery thereof, and a V-shaped base portion (20) having a first leg (22), a second leg (24) and an apex portion (26). The first leg (22) has an S-shaped configuration and connects with the arcuate portion (16) at a first end thereof. The second leg (24) has an inverted S-shape and connects with the arcuate portion (16) near an arcuate mid-length of the arcuate portion (16). The first leg (22) and second leg (24) merge smoothly with the apex portion (26). The apex portion (26) has an aperture (30) at a radial center of the arcuate portion (16). Each of the gears has an inner periphery (28) that enables complementary nesting of the pair of sector gears (12, 14).

Abstract: An actuator has a drive shaft connected to a valve flap. A toothed quadrant is mounted to be rotatable about the first axis of rotation of the drive shaft. A further quadrant is arranged in parallel with the toothed quadrant and is fixedly connected to the drive shaft. A two-armed lever is mounted between the toothed quadrant and the further quadrant to be rotatable about a second axis of rotation of a pin which is arranged in parallel with the first axis of rotation on the side, which faces the toothed quadrant, of the further quadrant. The toothed quadrant has a cutout and a projection is arranged on the two-armed lever at the end of the second lever arm of said two-armed lever and is directed into the cutout. The further quadrant has a third stop for the second toothed quadrant.

Abstract: A method of producing a torque transmission between a driving member and a driven member including the steps of capturing an annular gear within the interior of a hollow cylindrical shell formed of a formable material which is caused to be flow formed around a portion of the exterior of the gear to militate against any relative longitudinal and axial movement between the shell and the gear.

Abstract: A splined connection comprises a shaft with longitudinal radially outwardly protruding ridges and intermediate grooves, a hub provided with correspondingly shaped ridges and intermediate grooves and is adapted to being fitted in engagement with the shaft ridges and grooves to provide between the shaft and the hub a connection region causing the shaft and hub to rotate together. A sealing arrangement adapted to close off the connection region. The sealing arrangement comprises two annular sealing elements applied at an axial distance from one another and adjacent to the connection region so that the sealing elements are each in continuous contact with a surface of the shaft around the whole of their inner radial surface and in continuous contact with a surface of the hub around the whole of their outer radial surface.

Abstract: A gear, a method and a device having a transmission gear part and a hub synchro having a spline teeth formed on an outer peripheral surface thereof and plurality of key holes formed in the opposite side of the transmission gear part, in which the hub synchro is coaxially provided with said transmission gear part, the diameter of the hub synchro is smaller than that of the transmission gear part, and the spline teeth and the plurality of key holes on the hub synchro are formed by forging.

Abstract: A vibration reduction gear structure of an image input and output device includes a first gear supporting a second gear, and a vibration reduction portion made of vibration reduction material mounted on at least one of the first gear and the second gear. The other gear is rested on the vibration reduction portion. In such a manner, when the first gear and the second gear are rotated synchronously, the vibration between the first gear and the second gear may be reduced by the vibration reduction portion.

Abstract: A gearwheel, in particular a chain wheel, for the transmission of torque from one shaft to another, has a form-locking fastening device for fixing it on the shaft in a defined position. The fastening device is a bowl-shaped driver part and has a damping device for the damping of torsional oscillations, the damping device including of a leg spring with two legs which are angled parallel to one another and surround, under prestress, a driver extension on the driver part and a driver nose on the gearwheel. The angular position of the gearwheel on the shaft is defined by the force of the prestressed leg spring, the torsional oscillations bringing about a deflection of the gearwheel on the shaft through a particular angle of rotation in both directions of rotation and therefore being smoothed. The cost-effective and space-saving form of construction of the gearwheel, which forms a structural unit with the driver part and the leg spring, is advantageous.

Abstract: A gear drive, including a first shaft, a first gear wheel on the first shaft, a second shaft a certain distance away from the first shaft, and a second gear on the second shaft. The second gear wheel engaged with the first gear wheel by way of helical gearing. A third gear wheel is mounted on the second shaft a certain axial distance away from the second gear wheel to compensate for backlash. The third gear wheel also engages with the first gear wheel by way of helical gearing and being axially shiftable with respect to the second gear wheel. An expansion element is arranged so as to change a distance between the second gear wheel and the third gear wheel as a function of temperature.

Abstract: A sun gear apparatus includes an axle, a sun gear rotatably supported around the axle, and a sun gear guide ring disposed between an inner peripheral surface of the sun gear and the axle. The sun gear guide ring minimizes or eliminates looseness in the coupling between the sun gear and the axle.

Abstract: A gear made of fiber reinforced resin which is capable of being increased in durability and mechanical strength, as well as gear cutting characteristics. The gear is manufactured by arranging ring-like reinforcing fiber substrates and a metal bushing in a molding die and pouring thermosetting resin into the die to impregnate the reinforcing fiber substrates with the resin. The reinforcing fiber substrates are made by winding up a cylindrical body obtained by knitting an aramid fiber yarn along a central line thereof and then forming it into a ring-like shape. The reinforcing fiber substrates are pressed in a cold die so as to approach to a shape of the molding die, to thereby be formed into a rectangular shape in cross section. Then, the reinforcing fiber substrates are received together with the metal bushing in the molding die and then the thermosetting resin is poured into the molding die.

Abstract: A vibration reduction gear structure of an image input and output device includes a first gear supporting a second gear, and a vibration reduction portion made of vibration reduction material mounted on at least one of the first gear and the second gear. The other gear is rested on the vibration reduction portion. In such a manner, when the first gear and the second gear are rotated synchronously, the vibration between the first gear and the second gear may be reduced by the vibration reduction portion.

Abstract: A plastic gear is provided which includes a main body portion and a toothed portion. The main body portion is made of a synthetic resin containing reinforcement fibers. The toothed portion is made of a synthetic resin which is the same as the synthetic resin of which the main body portion is made except that it does not contain any reinforcement fibers. A method of producing such a plastic gear is also provided.

Abstract: A parking apparatus of an automatic transmission is provided to enable movement of the select lever from P range to another range to be realized more smoothly. A parking apparatus of an automatic transmission includes a parking gear assembly comprising an inner rotating member fixed to an output shaft of the transmission and an outer rotating member with indents formed on an outer circumference, the outer rotating member being rotatably disposed the inner rotating member, a parking rod assembly comprising a projection, the projection being interlocked with one of the indents in a parking “P” range, and a device for generating a rotational displacement between the inner rotating member and the outer rotating member when the projection is released from the indent.

Abstract: A cast composite sector gear including a hub made of a first material and an outer gear section made of a second material that is cast onto the hub. The hub is configured such that a secure mechanical bond can be created between the hub and the gear section when the gear section is cast onto the hub. The hub includes a base having a peripheral surface and a gear foundation that extends circumferentially from the peripheral surface about a portion of the base. The gear section is cast onto the gear foundation, and the gear section extends circumferentially about a portion of the hub.

Abstract: A cogged component, especially a wheel, rack, pinion, spline, or similar structure, intended for the mechanical transmission of force. The body is of a composite reinforced with carbon fibers. The body is, in accordance with the invention, of fiber-reinforced ceramic comprising a lattice of essentially continuous carbon fibers and a matrix that contains carbon. The fibers in the lattice are sheathed in silicon carbide formed essentially by liquid silicon infiltrating the lattice and reacting with the carbon in the matrix. The cogs are constructed either of a similar fiber-reinforced ceramic with a load-accommodating fiber orientation or of a monolithic ceramic.

Abstract: A double gear wheel of a turning device on printing presses comprises an adjustment gear wheel (4). On the adjustment gear wheel a conical seat (7) is formed, which conical seat (7) is engaged in a conical recess (9) formed on the corresponding stationary gear wheel (2), when the two gear wheels (2, 4) are clamped to one another by means of a clamping body (5). The double gear wheel described above has a compact construction, is easy to manufacture with a high degree of precision, and without the requirement for any additional elements essentially guarantees a frictional engagement which reliably prevents the mutual rotation of the two gear wheels (2, 4) during operation of the printing press, even on printing presses which consist of a large number of printing mechanisms.

Abstract: A support for a gear wheel, used in a toothed gear change transmission having a shaft and a gear wheel, where the support provides both sufficient axial fixing and radial play between the gear wheel and the shaft, necessary to compensate for working loads. The support is used with a gear wheel having internal teeth with at least one discontinuity in the internal teeth and a groove extending into the internal teeth. The support has a first disc with external teeth and at least one mating discontinuity in the external teeth, whereby the internal and external teeth and the discontinuities, respectively, can coincide with one another. A locking mechanism locks the position of the first disc relative to the gear wheel. To prevent against axial movement of the first disc against the direction of insertion into the groove, the support also includes a securing device.

Abstract: A toothed wheel with a variable number of teeth has a toothed ring formed by a driving chain or belt. The referenced diameter of the toothed wheel can be modified by adding or removing individual links by means of an auxiliary toothed wheel; so as to modify the length of the drive chain. At least one transmission member cooperates with the toothed wheel to insure the transmission of energy. The auxiliary toothed wheel is displaced together with the lateral guide of the driving chain, so that its radial spacing from the axis of rotation changes synchronically with the radial spacing change of the lateral guide of the driving chain.

Abstract: The invention relates to a machine having a driven gear, service access to which is partially obstructed. An aspect of the invention involves an aperture permitting access to the driven gear through a spatial area away from the obstructed region. The driven gear includes a plurality of arc-like segments mounted on a spider for removal individually and the dimensions of at least one segment and the aperture are cooperatively selected to permit a segment to be removed through the aperture to the spatial area. Segments of the driven gear may thereby be removed for service while yet avoiding removal of the driving gear or other substantial disassembly. A method for replacing the driven gear includes forming the aperture, detaching a segment and removing the segment through the aperture to the spatial area.