A boot seal is detachably attached to a joint including: a drive link and link members; and a ball joint for linking them to be relatively rotatable or swivelable. The ball joint includes a ball shank having a shaft section fixed to the drive link and a ball section provided on one end of the shaft section and a holder that is fixed to an end section of each of the link members and that has a ball-receiving section for supporting the ball section in a state where the ball section is surrounded. A cover main body that covers the gap between the ball shank and the holder and that is formed of a flexible material includes through-holes through which the shaft section is made to pass, a slit that continuously extends between the through-holes, and a fastener opening and hermetically closing the slit along the entire length thereof.

Provided are a ball joint and a dust cover that make it possible to suppress contact of a body portion of the dust cover with the vicinity of a flange portion of a ball stud. A dust cover integrally includes: a deformable bellows-shaped body portion made of an elastic body; a fixed portion made of an elastic body and provided on one end side of the body portion; and a sealing portion made of an elastic body and provided on the other end side of the body portion. The sealing portion includes: an inner peripheral sealing portion configured to be slidable on a part of a shank portion on the opposite side of the shank portion from a spherical portion with respect to a flange portion; and a cover portion that continuously covers, in an outer wall surface of the flange portion, a radially outward tip end portion and a part of a portion that decreases in diameter from the tip end portion toward the spherical portion side.

A vehicle drivetrain includes a driveshaft, a driveshaft joint and a boot. The driveshaft joint is configured to be coupled to an end of the driveshaft. The boot is disposed over the driveshaft joint. The boot has an inner wall and an outer wall. The inner and outer walls are separated by an empty space.

A constant velocity universal joint includes a body which encloses the constant velocity joint components and provides a smooth outer surface. A semi-rigid plastic boot has a spherical surface sized to generally match the outer surface of the body. The material of the boot is sufficiently elastic to allow the boot to fit over the body, yet sufficiently resilient to snap the open end closed after the boot is placed over the body to provide a substantial seal preventing entry of debris under the seal. A retaining ring is positioned on the boot near the truncated end, the ring establishing the location of an elastic seal that contacts the outer surface of the body.

A bicycle frame sealing means includes a frame-side sealing element adapted to be sealingly connected with a saddle tube of a bicycle frame. A saddle post-side sealing element is adapted to be sealingly connected with a saddle post. Both sealing elements are interconnected by means of a flexible connecting elements, so that relative movements can occur between the two sealing elements or between the saddle tube and the saddle post, while a good tightness is still ensured.

The present disclosure relates to an electric power steering apparatus including a rack housing extending in length along a lateral direction of a vehicle and opened by a hollow formed along its longitudinal direction to wrap a rack bar with both ends connected to tires, respectively, bellows connected to both ends of the rack housing, respectively, and formed to be flexibly stretched or contracted in an axial direction, a steel band provided to surround an end of the bellows connected to the rack housing to fix a connection of the rack housing and the bellows, and a coupler provided at the both ends of the rack housing and the end of the bellows and configured to couple the rack housing and the bellows so that, when the rack housing and the bellows are connected, the bellows is not separated from the rack housing and maintained connected thereto.

Provided are a ball joint and a dust cover of which a seal part can be prevented from being impacted due to great swings of a ball stud. A dust cover 100 includes a deformable body part 110, a fixed part 120 provided to the body part 110 on one end side and fixed to the socket 200, and a seal part 130 provided to the body part 110 on another end side, the seal part 130 has an elastic body part provided integrally with the body part 110 and having an inner peripheral seal part 131 which is configured to slide on the outer peripheral surface of the shaft 310 and a reinforcement ring 150 embedded in the elastic body part, and a tip end surface of the reinforcement ring 150 on a knuckle 400 side is at least partly exposed from the elastic body part and is in contact with the knuckle 400.

Disclosed is a steering system comprising a housing, a steering rack which is movably arranged and extends out, of a housing end section of the housing on at least one side of the housing with a steering rack end portion, at least one tie rod attached to the steering rack with a ball joint, at least one bellows covering the steering rack end portion of the steering rack, the ball joint and a section of the tie rod adjacent to the ball joint, the bellows having a first end and a second end, the first end being attached to the housing end section and the second end being attached to the tie rod at a tie rod attachment section, wherein a rolling diaphragm is arranged inside of the bellows, wherein a first end of the rolling diaphragm is attached to the housing end section and a second end of the rolling diaphragm is attached to the ball joint or the steering rack end portion, and wherein a rolling bend of the rolling diaphragm is movable between the housing and the second end of the bellows.

One aspect of this disclosure is directed to a Steering system comprising a housing in inch a steering rack is movably arranged and extends out of the housing on at least one side of the housing with a steering rack end portion. The steering rack being connected to a tie rod with a ball joint. At least the sections of the steering rack extending outside of the housing and the ball joint are covered by at least a protective bellows defining a central axis and the bellows further comprising a first bellows end defining a first bellows opening around the central axis and a second bellows end defining a second bellows opening around the central axis. The bellows is arranged inside a puncture resistant cover. The cover comprises a first cover end defining a first cover opening around the central axis and a second cover end defining a second cover opening around the central axis. At least one of the cover ends comprises at least one loop at least partially extending around the least one cover end and in which loop a clamp to fasten the cover end is arranged. The first bellows end and the second bellows end are arranged between the first cover end and the second end. Another aspect of this disclosure is directed to a puncture resistant cover with an elongated tubular shape along a central axis. The cover comprises a first cover end defining a first cover opening around the central axis and a second cover end defining a second cover opening around the central axis. At least one of the cover ends comprises at least one loop at least partially extending around the least one cover end and in which loop a clamp to fasten the cover end is arranged.

A piston boot has an annular fixing part that is formed on one end side of a stretchable part and abuts against an inner peripheral side of the cylinder. An outer peripheral surface of the annular fixing part is provided with a first region that abuts against an inner peripheral surface of the cylinder and a second region that is disposed closer to a bottom side of the cylinder than the first region in a piston axial direction. The outer diameter of the first region is larger than the inner diameter of the region of the inner peripheral surface of the cylinder that faces the second region.