A boot can be fastened to a joint housing with a seal. The boot includes a first and a second fastening region, and a pleated region between them. The first fastening region comprises lobe regions and/or guide regions, and connecting regions and a connector seat region, which comprises at least two grooves in at least the lobe regions and/or the guide regions, starting from the connector seat region surface, said grooves being parabolic when viewed in the cross sections and having different depths inside the lobe regions and/or the guide regions.

A boot can be fastened to a joint housing with a seal. The boot includes a first and a second fastening region, and a pleated region between them. The first fastening region comprises lobe regions and/or guide regions, and connecting regions and a connector seat region, which comprises at least two grooves in at least the lobe regions and/or the guide regions, starting from the connector seat region surface, said grooves being parabolic when viewed in the cross sections and having different depths inside the lobe regions and/or the guide regions.

A sealing bellows for a ball joint having a housing-side sealing area, a stud-side sealing area, and an outlet opening arranged between the sealing areas and which penetrates a wall of the sealing bellows. The outlet opening is open in the unassembled state of the sealing bellows. The outlet opening is closed in the assembled state of a ball joint. The sealing bellows and/or the ball joint can be used for a multi-point link, particularly a two-point link.

A bellows including a cylindrical and corrugated side wall, extending about a longitudinal axis, the side wall including: an alternation of crests and of troughs, forming corrugations; flanks, each flank extending between a crest and a trough, each corrugation having a first flank and a second flank that are opposite, separated by a same trough; the bellows includes at least one elementary electrical circuit associated with a corrugation, the elementary electrical circuit includes a first conductive element and a second conductive element, extending along the first flank and/or the second flank, the first conductive element being separated from the second conductive element; a first conductive track and a second conductive track, linked respectively to the first conductive element and to the second conductive element, and the first conductive track and the second conductive track are configured to be connected, to a detector of closure of the elementary electrical circuit.

The invention relates to a disc brake (1) for utility vehicles, having a brake caliper, a brake disc (37), an actuating lever (4) arranged axially to a disc brake axis (A) of the brake disc (37), an adjusting device (36) comprising an adjusting spindle (12), a pressure collar (13) and an adjusting spindle head (27), wherein the adjusting device (36) is arranged at least partially within an interior (7) of the brake caliper (2), a primary seal (8) for sealing the interior (7) of the brake caliper (2), an annular space (10), which is delimited by an inner wall (6) of a through-opening (19) of the brake caliper (2) and the adjusting device, and a secondary seal (9) for at least partially sealing the interior (7) of the brake caliper (2), characterized in that the primary seal (8) and the secondary seal (9) are designed as a piston protection cap (14).

A boot for a constant velocity universal joint includes large- and small-diameter mounting portions to be mounted to an outer joint member and a shaft, respectively, with boot clamps, a bellows portion integrally coupling the large- and small-diameter mounting portions to each other, and a cylindrical shoulder portion formed at a bellows portion-side end of the large-diameter-side mounting portion, and connected to the bellows portion through two auxiliary crest portions and one auxiliary trough portion between the auxiliary crest portions. A radial distance between each of the auxiliary crest portions and the auxiliary trough portion is shorter than a radial distance between a crest portion and a trough portion. A diameter passing through a center of the radial distance between each of the auxiliary crest portions and the auxiliary trough portion is larger than a diameter of the cylindrical shoulder portion.

A boot for a shaft assembly joint and method of construction thereof are provided. The boot has a flexible hollow wall extending about a central axis between a first end and a second end. The first end has a skirt portion configured for snug engagement with an outer surface of a housing of the constant velocity joint and the second end has a neck portion configured for snug engagement with an outer surface of a shaft extending away from the constant velocity joint. At least one of the skirt portion and the neck portion has interior surface formed of a first material having a first coefficient of friction and an exterior surface formed of a second material having a second coefficient of friction, the first coefficient of friction being greater than the second coefficient of friction.

A rotationally symmetrical bellows has a first end ring and a second end ring with a smaller diameter, and multiple folds, which in a relaxed position each have two flanks running in opposite directions with respect to one another while forming a bend. The flanks extend approximately parallel to an axis of rotation of the bellows. The rotationally symmetrical bellows is designed such that in a relaxed position of the bellows, the second end ring is arranged at an axial distance to the first end ring.

A rotationally symmetrical bellows has a first end ring and a second end ring with a smaller diameter, and multiple folds, which in a relaxed position each have two flanks running in opposite directions with respect to one another while forming a bend. The flanks extend approximately parallel to an axis of rotation of the bellows. The rotationally symmetrical bellows is designed such that in a relaxed position of the bellows, the second end ring is arranged at an axial distance to the first end ring.

A sealing device includes a movable part which is fixed to a shaft penetrating a wall of a vessel and is movable with the shaft, the vessel being configured to include an interior space, a first bellows part which has a first end fixed to the vessel and a second end fixed to the movable part, for sealing a penetrated portion of the vessel by the shaft, a second bellows part which is disposed opposite to the first bellows part across the movable part, and has a first end disposed on a side of the first bellows part and fixed to the movable part, and a second end fixed to a stationary member, and a communication path for causing an interior space of the first bellows part and an interior space of the second bellows part to communicate with each other.