Abstract: An axle boot for joint sealing, in particular on the drive train of motor vehicles, includes a substantially axisymmetric bellows, which is designed as a single piece with a connecting collar. The connecting collar has a plurality of indentations projecting towards the inside that are adapted to radial recesses in the external contour of the joint housing. To the outside of the connecting collar are attached compensating pieces that complete the external contour, forming a cylindrical circumferential surface on which a clamp is located.

Abstract: A disc brake for a motor vehicle is provided. The disc brake includes a brake disc, a brake caliper configured to straddle the brake disc, a tappet carried by the brake caliper and arranged to push a brake pad against the brake disc, and a bellows provided between the brake caliper and the tappet to seal a gap between the brake caliper and the tappet. A layer of flexible thermal insulation material may be provided between the bellows and the tappet. The layer of flexible thermal insulation material is configured to protect an outer surface of the bellows facing the brake pad from exposure to heat. Alternatively, the bellows may include a layer of flexible thermal insulation material on which an elastomer layer is formed. The layer of flexible thermal insulation material is configured to face the brake pad.

Abstract: A boot comprising a fold region and an attachment region is disclosed. The attachment region comprises an outside with at least two circumferential ribs extending from a base surface towards the outside and providing for a binder seat surface.

Abstract: A flexible section is provided between a small-diameter tube section and a bellows section of a boot for a joint, and the flexible section has a greater flexibility than the small-diameter tube section. When a spline shaft is displaced so as to incline relative to a constant velocity joint, deformation stress acting in the boot is relaxed by allowing the flexible section to deflect (bend). This inhibits the inner wall surface of the small-diameter tube section from separating from the sidewall surface of the spline shaft.

Abstract: To make a bellows section of a boot to be flexibly and repeatedly deformable without deterioration in durability, to thereby reduce rotational resistance when a joint angle is large, the boot has the bellows portion where three or more circumferentially extending crest portions and root portions therebetween are alternately formed. A large-diameter attaching portion is formed at one end of the bellows portion. A small-diameter attaching portion is formed at the other end. A rising wall closest to the large-diameter attaching portion and a rising wall closest to the small-diameter attaching portion have smaller wall thickness than other portions of the bellows section. A ratio (t1/t2) of the thickness (t1) of the rising walls to the thickness (t2) of the other portions of the bellows portion is set to 0.6?t1/t2<1.0.

Abstract: The invention provides a method that can be applied, for example, to seal a constant velocity joint. The invention includes a method comprising the steps of substantially sealing the constant velocity joint with the primary boot which includes first and second ends, fixedly associating the first end of the primary boot with the constant velocity joint, and slidably associating the second end of the primary boot with the shaft which extends from the constant velocity joint. In one aspect, the invention includes a primary boot having a body defining a substantially smooth interior surface and a secondary boot associated with the primary boot and spaced from the interior surface. In another aspect, the invention includes a constant velocity joint having an outer joint member, an inner joint member positioned in the outer joint member, a plurality of ball members positioned between said outer and inner joint members, and a shaft engaged with and extending from the inner joint member.

Abstract: A boot is disclosed having a first attachment region which is assigned to a joint, and a second attachment region which is assigned to a shaft. The boot has a plurality of folds, including a first fold region with at least two folds with a diameter that decreases in the direction of the second attachment region and at least one revolving, separating element which is arranged in an annular fold root between two folds.

Abstract: A boot for a joint, wherein an equal-diameter part and thick-walled parts are formed on the inner peripheral wall of a large diameter tube part. A first tapered part extending from the equal-diameter part is continued with a second tapered part formed at the thick-walled parts in the circumferential direction. The diameter reducing ends of the first tapered part and the second tapered part are located at the same position, and a thin-walled part engaged with an annular groove formed in the outer member of a constant-velocity joint is continued with the diameter reducing end.

Abstract: A joint assembly has a pair of constant velocity universal joints and a connecting drive shaft. A cover unit protects the constant velocity universal joints and prevents hanging down of the joints under their own weight. The unit cover is arranged to cover the outer circumferential surfaces of the pair of constant velocity universal joints and boots. The unit cover is formed from elastomer material by injection molding. The cover unit inner circumferential surface has a configuration corresponding to the outline configurations of the pair of constant velocity universal joints and the boots.

Abstract: An inner seal is provided for protecting a CV joint boot for a CV joint. The CV joint includes a bearing, a back sealing means and a front can. The bearing operatively connects a first shaft and a second shaft. The bearing has an inner race and an outer race and has a front and a back. The first shaft is connected to the inner race. The second shaft is connected to the outer race. The front can is connected to the outer race. The back sealing means seals against leakage of lubricant from the back of the bearing. The inner seal comprises an inner seal body having a front can sealing portion for sealing with the front can to inhibit the migration of lubricant from the bearing therebetween. The inner seal body has a shaft sealing portion for sealing with the first shaft to inhibit the migration of lubricant from the bearing therebetween. The inner seal body has a shield portion that extends between the front can sealing portion and the shaft sealing.

Abstract: A propshaft assembly has an inner tube, an outer tube having an end splined to the inner tube thereby defining an engagement area between the inner tube and the outer tube. The propshaft assembly also includes at least one stiffening ring disposed around the outer tube. At least a portion of the stiffening ring is in contact with the outer tube.

Abstract: A boot has a large diameter tube section, a small diameter tube section, and a bellows section for connecting the large diameter tube section and the small diameter tube section. The bellows section has, in a continuous manner, first to sixth crest sections and first to sixth root sections. The angles of opening of the inner peripheral surfaces of the crests of the first to third crest sections are set smaller than the angles of opening of the inner peripheral surfaces of the crests of the fourth to sixth crest sections. Further, the wall thicknesses of tilt sections are set smaller than the wall thickness of tilt sections.

Abstract: A homokinetic joint includes an inner hub and an outer hub, wherein several pathways are associated together in pairs, wherein balls which are guided in a cage are received in order to transmit torque between the inner hub and the outer hub. A sealing arrangement includes a set of bellows and seals the homokinetic joint. The radially outer edge of the set of bellows is coupled to the outer hub and/or to a carrier housing engaging therewith. The radially inner edge is secured in a stationary manner on the inner hub.

Abstract: A method for fixing a boot includes mounting a tubular anchoring areas (12, 13), defined in opposite ends of a resinous boot (11), on an outer periphery of a counterpart member (1), and applying a clamping force to boot bands (15, 16) mounted around respective outer peripheries of the tubular anchoring areas (12, 13) to thereby fix the tubular anchoring areas (12, 13) to the outer periphery of the counterpart member (1). Coils (17) are disposed around respective outer peripheries of the boot bands (15, 16) to generate an induction current in the boot bands (15, 16). In this way, a reactive force of the magnetic field is generated between the coils (17) and the boot bands (15, 16) to plastically deform the boot bands (15, 16) and reduce their diameters, whereby the tubular anchoring areas (12, 13) are fixed to the outer periphery of the counterpart member (1).

Abstract: A type of flexible boot sized to envelop an object mounted on a smaller shaft with one or both ends of the boot having an expandable opening. When used to protect an automotive type constant velocity joint, the boot will have one plain cylindrical end and one pleated end. The plain end of the boot mates to a housing of the CV joint, the opposite end mates to its input shaft. The shaft mating end of the boot is comprised of a circumference of radially arranged shaped pleats. During installation of the boot over the constant velocity joint, the pleated end of the boot may be spread apart and passed over the larger diameter of the joint housing. The pleats may then be closed inwardly to a nested condition where they are constrained and compacted to the shaft with a surrounding band clamp.

Abstract: A method for making a casing (1) with protective bellows (2, 2A) for transmission device, such as a transmission joint, includes at least two shafts mobile axially and/or at an angle relative to each other, the casing (1) with bellows (2, 2A), whereon at least part of the bellows (2?) are radial, having at each open end a section (3A, 3B) for being fixed to the transmission device. The method includes moulding the casing (1) with bellows (2, 2A), using a hollow mould and at least one core, having each at least a matching helical thread delimiting the moulding space and stripping the casing (1) formed by relatively unscrewing the casing (1) and the core to obtain a single-piece casing (1). The invention is applicable to a casing with bellows by arrangement of extensible or flexible coupling elements.

Abstract: A boot for a universal shaft coupling, by which an improvement of an assembling workability can be expected, and an improvement of a sealing performance can be expected. The boot for the universal shaft coupling is formed by a rubber elastic body, and separated portions (22) are formed linearly along a generatrix. A fastener pair (26) is arranged in both sides of the separated portions (22) so as to form a seal portion. The fastener pair (26) is constituted by an occluding portion (32) formed in one end edge of the separated portion (22) and provided with a bulge locking portion (32a) in a leading end, and an occluded portion (34) formed in another end edge of the separated portion (22) and provided with an occluding groove (33) occluding with the bulge locking portion (32a).

Abstract: A boot for constant-velocity universal joint includes a major-diameter fastener, a minor-diameter fastener, and a bellows. The bellows includes a first root, a first crest, a second root, a second crest, a third root, a third crest, a fourth root, a fourth crest, a fifth root and a fifth crest. The first crest, the second crest, the third crest, the fourth crest and the fifth crest have a top, respectively, and the tops of the second crest, third crest and fourth crest are disposed on an outer peripheral side with respect to a line L1, which the tops of the first crest and fifth crest make there between, in a cross section involving the central axis of the bellows.

Abstract: The invention relates to a convoluted boot which serves to seal an annular gap between an outer joint part of a tripode joint and a shaft connected to the inner joint part of the tripode joint. The convoluted boot 1 comprises an elastic adapter ring 2 for being attached to the outer joint part and a boot portion 3 connected thereto and extending between the adapter ring 2 and a collar 5 for being fixed to the shaft. The adapter ring 2 comprises a cylindrical outer face 10 and an inner face 8 whose cross-section is adapted to the outer contour of the outer joint part and which is form-fittingly positioned on the outer joint part. At least in partial regions of the wall formed between the inner face 8 and the outer face 10, there is provided a plurality of holes 12 which start from an end face or radial face of the adapter ring and are arranged to form a honeycomb-like structure.

Abstract: To prevent inverting of a mountain portion (111) of a bellows member (11) when a rotating shaft (23) is angularly displaced, the boot comprising the bellows member (11) with large and small diameter mounting members (12, 13) is structured such that a first mountain portion (111) nearest the large diameter mounting member (12) raises from the large diameter mounting member (12), a length (L1) between a top (111a) of the first mountain portion (111) and a bottom (111b) at the large diameter mounting member (12) side is not more than a length (L2) between the inner peripheral position of the bottom (111b) and an end portion (21b) of an outer ring (21) at the rotating shaft (23) side, and a first valley portion (112) adjacent to the first mountain portion (111) is positioned at the rotating shaft (23) side from the end part (21b).

Abstract: A transmission joint consists of two drive shafts connected by an articulated mechanical connection. This connection is protected by an elastic socket, such as a sealing bellows, connecting the shafts. One end of this socket is multilobed to cover upon contact a multilobed element of the articulated mechanical connection and works with a tightening element of the collar type that surrounds the multilobed end of the socket. The multilobed end of the protective socket has, to the right of the zones of greater thickness of the multilobed wall, a reinforcement of the thickness to obtain an external radial bulge of the wall of the socket, at least when mounted on the multilobed connection element. The bulge works with the collar type tightening element to balance the tightening forces between the thin and reinforced portions of the multilobed wall.

Abstract: In a joint boot to be mounted on an outer housing having a non-circular outer peripheral configuration, the invention is designed for ensuring a high sealing capability without impairing the moldability. To that end, its large-diameter attachment part to be attached to the outer housing is configured, in its internal peripheral contour, to bulge radially inwardly in plural circumferential places thereof so that bulging portions each include an inner wall portion radially inwardly bulging in a curved form, an arc-like outer wall portion constituting part of an outer peripheral face of the large-diameter attachment part, a radially extending central strut wall linking these inner and outer wall portions in peripheral centers of both, and lateral strut walls linking on both sides of the central strut wall the inner and outer wall portions. The lateral strut walls are slanted such that their outward parts approach the central strut wall.

Abstract: In a universal joint boot including a bellows part, a ring-shaped mounting part that is formed at one end of the bellows part and into which a cup for receiving one member of two members moving relatively to each other is inserted; and a seal that is formed toward the peripheral direction of the inner peripheral surface of the mounting part to which the cup is mounted, the inner peripheral surface has protrusions protruding toward the axial center of the ring-shaped mounting part and the height of the seal lip becomes lower from the bottom of the protrusion to a peak and width of the seal lip becomes wider from the bottom of the protrusion to the peak, whereby sealing performance can be improved.

Abstract: A power transmission shaft includes a swaged boot-engaging groove on an outer circumference of thereof. Further, the power transmission shaft includes a reduced diameter portion provided in the vicinity of the boot-engaging groove. The reduced diameter portion is formed by swaging at the same time as the boot-engaging groove is formed.

Abstract: To make a bellows section (1) of a boot to be flexibly and repeatedly deformable without deterioration in durability, to thereby reduce rotational resistance when a joint angle is large, the boot has the bellows portion (1) where three or more circumferentially extending crest portions (111-113) and root portions (121-122) therebetween are alternately formed; a large-diameter attaching portion (2) formed at one end of the bellows portion; and a small-diameter attaching portion (3) formed at the other end, a rising wall (1a) closest to the large-diameter attaching portion (2) and a rising wall (1f) closest to the small-diameter attaching portion (3) have smaller wall thickness than other portions of the bellows section (1), and the ratio (t1/t2) of the thickness (t1) of the rising walls (1a, 1f) to the thickness (t2) of the other portions of the bellows portion (1) is set to 0.6?t1/t2<1.0.

Abstract: A direct torque flow constant velocity joint connector includes an outer joint part having outer ball tracks and an outer surface, an inner joint part with inner ball tracks, a cage, a plurality of balls held in the cage and engaging the inner and outer ball tracks, and a boot. The boot includes a first end and a second end, wherein the first end is axially secured to the outer surface of the outer joint part while providing rotational freedom between the boot and the outer joint part, and the second end is selectively attachable to a supplied drive unit.

Abstract: A flexible section is provided between a small-diameter tube section and a bellows section of a boot for a joint, and the flexible section has a greater flexibility than the small-diameter tube section. When a spline shaft is displaced so as to incline relative to a constant velocity joint, deformation stress acting in the boot is relaxed by allowing the flexible section to deflect (bend). This inhibits the inner wall surface of the small-diameter tube section from separating from the sidewall surface of the spline shaft.

Abstract: A power transmission device includes a housing, first and second shafts and a generally tubular boot. The housing has an aperture that at least the first shaft passes through. The first and second shafts are coupled together through a splined connection causing the shafts to rotate with one another while allowing axial translation between the shafts. The boot includes a first end engaged with the first shaft and a second end engaged with the second shaft. The first end of the boot includes a flange having an insert located therein. A portion of the first end biasedly engages the first shaft thereby eliminating the need for a clamp previously required.

Abstract: A resin boots for constant velocity universal joint, including: a resin bellows including an approximately conical bellows-shaped portion with its inner hollow part, a small diameter end portion communicated with an inner space of the bellows-shaped portion and arranged at one end, and a large diameter side end portion communicated with the inner space of the bellows-shaped portion and arranged at the other end; a large thickness portion formed in an inner surface of a large diameter side end portion of the resin bellows in accordance with an injection molding, protruded in the vertical direction to the center of the large diameter side end portion and arranged in the circumferential direction at regular intervals; and a small thickness portion arranged between the large thickness portions and formed thinner in the diametrical direction compared with large thickness portion.

Abstract: A universal joint boot having a boot body including a bellows part and an opening portion which is formed in one end of the bellows part and into which a case for receiving one member of two members moving relatively to each other is inserted. An annular adaptor is mounted on the inner peripheral surface of the opening portion and has an outer peripheral surface formed nearly in the same shape as the inner peripheral surface. The adaptor has a fixing portion that is pressed by the inner peripheral surface of the opening portion of the boot body, thereby being fixed to the case. A reversing portion is located opposite to the fixing portion with the opening portion between them and sandwiches the opening portion together with the fixing portion. A folding portion is located where the reversing portion is folded back to the outside. Hence, the universal joint boot can be easily assembled.

Abstract: A rotation drive force transmission mechanism has tripod constant-velocity joints coupled to respective ends of a shaft in opposite phase. Outer members of the tripod constant-velocity joints and portions of the shaft are covered with boots. When the large-diameter tube of each of the boots is fastened to the corresponding outer member by a first fastening band, a band crimping ratio is managed so as to fall within a predetermined range. Each of the outer members has a boot mount whose shape is selected to satisfy predetermined equations.

Abstract: A boot for a universal joint including a first sleeve portion defining a first circular opening and a second sleeve portion spaced from the first sleeve portion along a boot axis, the second sleeve portion defining a second circular opening having a smaller diameter than the first circular opening, the boot also including a plurality of convolutions defined along the boot axis between the first sleeve portion and the second sleeve portion by a plurality of roots extending radially inward toward the boot axis and by a plurality of crests extending radially outward away from the boot axis, the plurality of roots including a first root and a second root immediately adjacent to one another, the first root being closer than the second root to the first sleeve portion, the first root extending radially further than the second root toward the boot axis.

Abstract: A smaller cylindrical portion having a clamp groove formed on an outer peripheral surface thereof has a cylindrical surface portion which extends straight in an axial direction, an inclined surface portion which extends, while being inclined, radially outwardly from an end portion of the cylindrical surface portion and a vertical wall surface portion which extends straight radially outwardly from an end portion of the inclined surface portion, the cylindrical surface portion, the inclined surface portion and the vertical wall surface portion being formed continuously sequentially in that order from a side wall surface of the clamp groove. A stress concentration on a specific location on the smaller cylindrical portion can be suppressed by virtue of the stress alleviating action of these cylindrical surface portion, the inclined surface portion and the vertical wall surface portion.

Abstract: A sealing sleeve (11) of the rolling boot type having a first larger, substantially cylindrical collar (12), a second smaller, substantially cylindrical collar (13), as a well as a wall portion (14) which is positioned between the collars (12, 13) and which forms at least one axially open annular fold (15) with circumferentially distributed indentations (18) in the convex curvature of the axially open annular fold (15), or with radial ribs (21) in the concave inner curvature of the axially open annular fold.

Abstract: A boot includes a major-diameter fastener, a first bellows, a second bellows, a minor-diameter-side bellows, and a minor-diameter fastener. The major-diameter fastener is to be fastened to a mating major-diameter member. The first bellows is disposed continuously from the major-diameter fastener. The second bellows is disposed continuously from the first bellows. The minor-diameter-side bellows is disposed continuously from the second bellows. The minor-diameter fastener is disposed continuously from the minor-diameter-side bellows, and is to be fastened to a mating minor-diameter member. The first bellows exhibits an averaged first axial rigidity. The second bellows exhibits an averaged second axial rigidity. The minor-diameter-side bellows exhibits an averaged third axial rigidity. The averaged first axial rigidity and the averaged third axial rigidity are lower than the averaged second axial rigidity.

Abstract: The invention relates to a homocinetic joint (1, 1?) comprising an inner hub (2, 2?) and an outer hub (3), wherein several pathways (4, 5) are associated together in pairs, wherein balls (6) which are guided in a cage (7) are received in order to transmit torque between the inner hub and the outer hub. A sealing arrangement (10, 11, 16) comprising a set of bellows (11, 16) is provided in order to seal the homocinetic joint. The radially outer edge (11b 16b) of the set of bellows is coupled to the outer hub (3) and/or to a carrier housing (9, 9?) engaging therewith. The radially inner edge (11a, 16a) is secured in a stationary manner on the inner hub (2, 2?).

Abstract: One end of a resilient sleeve is fitted on a tubular projection of the bell of a constant velocity joint. The sleeve covers a radial slot formed in the projections and the arms of a spring locking ring for axially removably securing the joint bell to a toothed driving ring fixed on a rotatable hub. The other end of the sleeve has a radially inwardly projecting flange which is sealingly axially clamped against a rigid annular part secured to or integral with the hub.

Abstract: Shifting prevention and sealing property between a boot for a constant velocity universal joint, having a thick portion on the inner peripheral surface of a large-diameter-side end portion and the outer peripheral surface of a tripod joint casing are enhanced, costs for preparing the casing are reduced, and the preparation is facilitated. One or a plurality of seal lips are disposed in the form of protrusions over the whole periphery in a peripheral direction of the inner peripheral surface of the large-diameter-side end portion of the boot for the tripod joint, into which the casing of the tripod joint is inserted, shift preventive walls are disposed on opposite sides of an axial direction via the seal lip, and inner diameters of the shift preventive walls are formed to be smaller than those of base portions of the seal lips. The shift preventive walls and the seal lips are disposed right under a band fastening portion.

Abstract: A coupling device for a dishwasher pump with a synchronous motor and external stator, comprising a first tang connected to the delivery tube of the pump, a second tang connected to the suitable pipeline of a washing tank and a connection mean part. The connection mean part comprises a frustum of cone-shaped section, intermediate between said first and second tang and a flexible annular lip formed between said second tang and the smallest base of the frustum of cone-shaped section. Advantageously, the external part of the frustum of cone-shaped section is reinforced with annular ribs.

Abstract: A power transmission device includes a housing, first and second shafts and a generally tubular boot. The housing has an aperture that at least the first shaft passes through. The first and second shafts are coupled together through a splined connection causing the shafts to rotate with one another while allowing axial translation between the shafts. The boot includes a first end engaged with the first shaft and a second end engaged with the second shaft. The first end of the boot includes a flange having an insert located therein. A portion of the first end biasedly engages the first shaft thereby eliminating the need for a clamp previously required.

Abstract: A grease composition to be encapsulated in a boot made from TPC for use in a tripot type constant velocity joint having a base oil, a thickener of a urea based compound, a solid molybdenum dithiocarbamate and an alkali metal borate hydrate, wherein the liquid component in the grease composition has a sulfur content of 0.6 mass % or less relative to the total amount of the liquid component.

Abstract: A boot for a joint, wherein an equal-diameter part and thick-walled parts are formed on the inner peripheral wall of a large diameter tube part. A first tapered part extending from the equal-diameter part is continued with a second tapered part formed at the thick-walled parts in the circumferential direction. The diameter reducing ends of the first tapered part and the second tapered part are located at the same position, and a thin-walled part engaged with an annular groove formed in the outer member of a constant-velocity joint is continued with the diameter reducing end.

Abstract: An apparatus and method that can be applied, for example, to seal a constant velocity joint. In a first aspect, a primary boot having a body defining a substantially smooth interior surface and a secondary boot associated with the primary boot and spaced from the interior surface. In a second aspect, a constant velocity joint having an outer joint member, an inner joint member positioned in the outer joint member, a plurality of ball members positioned between said outer and inner joint members, and a shaft engaged with and extending from the inner joint member. The primary boot is fixedly associated with respect to the outer joint member and slidably associated with said shaft.

Abstract: A boot for a constant velocity universal joint, having an inner surface that is prevented from contacting an edge portion of an outer housing of a constant velocity universal joint regardless of the bend of the boot. The boot includes a large end portion, a small end portion, and a bellows formed between the large and small end portions. The large end portion has an annular face portion facing the end face of a tip portion of the outer housing of the constant velocity universal joint, and defining a concave face portion dented to define an annular gap with the peripheral edge portion.

Abstract: In a joint boot to be mounted on an outer housing having a non-circular outer contour, intended to axial positioning without impairing the mountability to the outer housing. The joint boot (10) comprises a boot body (18) including a large-diameter attachment part (12), a small-diameter attachment part (14) and a bellows part (16), and a bushing (20) interposed between the outer housing and the large-diameter attachment part. The bushing assumes on its outer peripheral surface a circular form in cross-section and is provided, on its inner peripheral part to be externally fitted and fixed to the outer housing, with plural lobe portions (26) in a circumferentially distributed manner. On the inner peripheral surface of the bushing, protrusions (56) mating with circumferentially extending grooves (54) formed on the outer peripheral surface of the outer casing are provided in a position deviating from an external fitting area (Q) by the large-diameter attachment part in the axial direction of the bushing.

Abstract: A constant velocity joint and a boot for a constant velocity joint are disclosed. The boot generally includes a first channel and a second channel. The first channel is in fluid communication with a joint chamber of the constant velocity joint. The first channel is also in communication with the second channel and generally allows airflow therethrough while resisting clogs from lubricant. Additionally, the second channel generally allows airflow therethrough to the atmosphere while resisting passage of foreign contaminants therethrough.

Abstract: Positioning projections for engaging recesses in an outer peripheral surface of a mating member project from an inner peripheral surface of a grommet, and the position of a minimum inside diameter portion of each positioning projection after being fitted to the mating member is offset from interference of a jointing member. In a case where the positioning projections are formed in front of a sealing projection, a larger cylindrical portion is absent around their outer peripheries. Therefore, the enlargement of the diameter of the grommet during fitting to the mating member is not restricted, resistance during fitting is alleviated, and the positioning projections are engaged in the recesses with large elastic reaction force. Hence, a click feel is excellent.

Abstract: A power transmission device includes a housing, first and second shafts and a generally tubular boot. The housing has an aperture that at least the first shaft passes through. The first and second shafts are coupled together through a splined connection causing the shafts to rotate with one another while allowing axial translation between the shafts. The boot includes a first end engaged with the first shaft and a second end engaged with the second shaft. The first end of the boot includes a flange having an insert located therein. A portion of the first end biasedly engages the first shaft thereby eliminating the need for a clamp previously required.

Abstract: A boot for a constant velocity universal joint includes a minor-diameter cylinder, a major-diameter cylinder, and a bellows. The major-diameter cylinder includes a sealing protrusion rim, a plurality of flanges, and positioning protrusions. The sealing protrusion rim is formed on an inner peripheral surface of the major-diameter cylinder. The flanges are disposed at intervals in a peripheral direction of the major-diameter cylinder, and extend axially outward from an opposite end surface of the major-diameter cylinder. The positioning protrusions protrude from the flanges radially toward an inner peripheral side of the major-diameter cylinder, and are to be engaged with concavities formed in an outer peripheral surface of the mating member. The boot maintains the sealing ability high, and at the same time can reduce the resistance during its fitting around a mating member, and can furthermore produce a fitting completion feeling when the fitting is completed.

Abstract: In a resin joint boot installed on an outer housing having a non-circular outer configuration as in a tripod constant velocity joint, assembling properties of its large-diameter attachment part are improved. The large-diameter attachment part of the joint boot assumes at its outer peripheral face a circular form in cross-section and has on its inner periphery plural lobe portions projecting radially inwardly provided in a circumferentially distributed manner. The large-diameter attachment part is formed, at least in circumferentially one place on its opening edge face, integrally with a tongue-like piece in a projecting manner. And on its inner peripheral face, a faying inner peripheral portion of a smaller diameter than that of the outer housing is provided, and at its opening extremity, an upset inner peripheral portion in a straight hole form of a larger diameter than that of the outer housing is provided on the inner peripheral face.