A fastening shackle for fastening a leaf spring to a vehicle body of a vehicle includes: a first bearing end which can be fastened to the vehicle body, a second bearing end, and a shackle body connecting the first bearing end and the second bearing end. The first bearing end has an outer sleeve, an inner sleeve and a sleeve-shaped plastic plain bearing, the sleeve-shaped plastic plain bearing being arranged in the outer sleeve and being slidably mounted in the outer sleeve, and the inner sleeve being affixed to the sleeve-shaped plastic plain bearing. The leaf spring is mountable at the second bearing end.

A fastening shackle for fastening a leaf spring to a vehicle body of a vehicle includes: a first bearing end which can be fastened to the vehicle body, a second bearing end, and a shackle body connecting the first bearing end and the second bearing end. The first bearing end has an outer sleeve, an inner sleeve and a sleeve-shaped plastic plain bearing, the sleeve-shaped plastic plain bearing being arranged in the outer sleeve and being slidably mounted in the outer sleeve, and the inner sleeve being affixed to the sleeve-shaped plastic plain bearing. The leaf spring is mountable at the second bearing end.

An interface apparatus including a load bearing member configured for coupling to a structure, and an attachment member coupled to the load bearing member, wherein the load bearing member is configured to react loads, from the attachment member to the structure, in at least a first direction while simultaneously providing free movement of the attachment member in at least a second direction.

An interface apparatus including a load bearing member configured for coupling to a structure, and an attachment member coupled to the load bearing member, wherein the load bearing member is configured to react loads, from the attachment member to the structure, in at least a first direction while simultaneously providing free movement of the attachment member in at least a second direction.

A sliding component includes a pair of sliding parts each having an annular sliding face to relatively slide on each other. At least one of the sliding faces has a plurality of dimples disposed thereon. The dimples have substantially the same opening diameter, and are provided independently of each other. The ratio between the depth h and the diameter D of the dimples is set in a range of 1/500 to 1/10. The dimples are arranged randomly such that the area ratio of the dimples within a 120 unit angle in a circumferential direction of a sliding face is in a range of 8% to 50%.

A chain joint assembly includes a pin integral with at least one respective first chain link and a bushing, integral with at least one respective second chain link. The pin and the bushing are coaxial. The bushing has a constant inside diameter. At least one elastic ring is interposed between the pin and the bushing. The at least one elastic ring is substantially aligned with the portion of bushing which is coupled to a respective second chain link.

A chain joint assembly includes a pin integral with at least one respective first chain link and a bushing, integral with at least one respective second chain link. The pin and the bushing are coaxial. The bushing has a constant inside diameter. At least one elastic ring is interposed between the pin and the bushing. The at least one elastic ring is substantially aligned with the portion of bushing which is coupled to a respective second chain link.

An interface apparatus including a load bearing member configured for coupling to a structure, and an attachment member coupled to the load bearing member, wherein the load bearing member is configured to react loads, from the attachment member to the structure, in at least a first direction while simultaneously providing free movement of the attachment member in at least a second direction.

Provided are a polyurethane elastomer composition excellent in the abrasion resistance and swelling resistance, and a bearing material formed of the polyurethane elastomer composition. The polyurethane elastomer composition contains a polyurethane elastomer of 100 parts by mass, polyethylene wax of 325 parts by mass, and paraffin wax of 110 parts by mass. Further, preferably the polyurethane elastomer composition contains a cobalt based compound of 0.110 parts by mass.

A proprotor system for a tiltrotor aircraft having a helicopter flight mode and an airplane flight mode. The proprotor system includes a yoke having a plurality of blade arms with inboard pockets. A centrifugal force and shear bearing assembly is disposed in each of the inboard pockets of the yoke. Each of a plurality of proprotor blades is coupled to the yoke by one of the bearing assemblies such that each proprotor blade has a pitch change degree of freedom about a pitch change axis and a tilting degree of freedom about a focal point. Each bearing assembly includes a centrifugal force bearing coupled to the yoke, a shear bearing coupled to the yoke and an inboard beam coupled between the centrifugal force bearing and the shear bearing. Each inboard beam is coupled to a respective proprotor blade.