The twist axle assembly includes a cross beam that extends along a length between opposite ends, and a pair of trailing arms are fixedly attached with the opposite ends. A spindle plate is fixedly attached with each of the trailing arms. For each spindle plate and trailing arm combination, the spindle plate and trailing arm are provided with cooperating orbital adjustment features which allow an orientation of the spindle plate relative to the trailing arm to be adjusted prior to the spindle plate being fixedly attached with the trailing arm for allowing preselection of a camber angle, a caster angle, and a toe angle for a wheel to be coupled with the spindle plate.

The twist axle assembly includes a cross beam that extends along a length between opposite ends, and a pair of trailing arms are fixedly attached with the opposite ends. A spindle plate is fixedly attached with each of the trailing arms. For each spindle plate and trailing arm combination, the spindle plate and trailing arm are provided with cooperating orbital adjustment features which allow an orientation of the spindle plate relative to the trailing arm to be adjusted prior to the spindle plate being fixedly attached with the trailing arm for allowing preselection of a camber angle, a caster angle, and a toe angle for a wheel to be coupled with the spindle plate.

This axle beam is provided with a pair of horizontal plate sections separated vertically from and facing each other; and a vertical plate section extending vertically so as to connect intermediate sections, in a front-rear direction, of the pair of horizontal plate sections. The horizontal plate section on the upper side has a forwardly extending upper front plate section and a rearwardly extending upper rear plate section, and the horizontal plate section on the lower side has a forwardly extending lower front plate section and a rearwardly extending lower rear plate section. One of the upper front plate section, the upper rear plate section, the lower front plate section, and the lower rear plate section is set to have a smaller length in the front-rear direction than the other three plate sections, and among the other three plate sections, the two plate sections which are separated vertically from and facing each other are set to have substantially the same length in the front-rear direction.

This axle beam is provided with a pair of horizontal plate sections separated vertically from and facing each other; and a vertical plate section extending vertically so as to connect intermediate sections, in a front-rear direction, of the pair of horizontal plate sections. The horizontal plate section on the upper side has a forwardly extending upper front plate section and a rearwardly extending upper rear plate section, and the horizontal plate section on the lower side has a forwardly extending lower front plate section and a rearwardly extending lower rear plate section. One of the upper front plate section, the upper rear plate section, the lower front plate section, and the lower rear plate section is set to have a smaller length in the front-rear direction than the other three plate sections, and among the other three plate sections, the two plate sections which are separated vertically from and facing each other are set to have substantially the same length in the front-rear direction.

A semi-trailer wheel restraint system having at least one bearing or swivel, or a combination of bearing(s) and swivel(s), and one or more cable sections and one or more hub cab attachments for receipt into one or more wheel assemblies and through a hollow core of the trailer's axle. During a wheel bearing failure, the wheel restraint system keeps the loose wheel assembly near the end of the axle by anchoring it to the opposite-end's hub cap, thereby preventing a run-away wheel assembly and providing an operator of the truck an opportunity to safely stop the rig.

A semi-trailer wheel restraint system having a bearing swivel and one or more cable sections and hub cab attachments for receipt into and through a hollow core of the trailer's axle. During a wheel bearing failure, the wheel restraint system keeps the loose wheel assembly near the end of the axle by anchoring it to the opposite-end's hub cap, thereby preventing a run-away wheel assembly and providing an operator of the truck an opportunity to safely stop the rig.

A semi-trailer wheel restraint system having a bearing swivel and one or more cable sections and hub cab attachments for receipt into and through a hollow core of the trailer's axle. During a wheel bearing failure, the wheel restraint system keeps the loose wheel assembly near the end of the axle by anchoring it to the opposite-end's hub cap, thereby preventing a run-away wheel assembly and providing an operator of the truck an opportunity to safely stop the rig.

An axle kit apparatus for increasing the mobility of foldable sawhorse stands while allowing the tires used to be customizable. The invention consists of an axle that connects all of the pieces together. It is mounted with two fasteners that pass through the axle. Two spindles thread into the axle to allow them to be removable. Two objects with threaded apertures lock the spindles in place as well as provide the necessary preload to the bearing races of any tire used. The invention allows for any size spindle and tires to be used as long as the spindle can thread into the axle.

An axle/suspension system (1) has an axle (5) supported from the frame of the vehicle by a pair of rigid longitudinal beams (4) pivoted to frame hangers (3). Air springs (7) and shock absorbers (8) connect between the rigid beams (4) and the frame above to control suspension movement. The axle/suspension system is particularly suited as a mid-lift axle on the tractor of a tractor-trailer vehicle. A characteristic feature is the pivotal connection (21) between each hanger (3) and beam (4), which is through a resilient bush (6) having a compliance ratiobeing a ratio of the longitudinal spring rate to the vertical spring rateof at least 10:1.

An axle/suspension system (1) has an axle (5) supported from the frame of the vehicle by a pair of rigid longitudinal beams (4) pivoted to frame hangers (3). Air springs (7) and shock absorbers (8) connect between the rigid beams (4) and the frame above to control suspension movement. The axle/suspension system is particularly suited as a mid-lift axle on the tractor of a tractor-trailer vehicle. A characteristic feature is the pivotal connection (21) between each hanger (3) and beam (4), which is through a resilient bush (6) having a compliance ratiobeing a ratio of the longitudinal spring rate to the vertical spring rateof at least 10:1.