An axle assembly includes a first axle shaft. The first axle shaft includes a first conduit. A second axle shaft includes a second conduit. The first conduit and the second conduit are in fluid communication through a chamber. A differential is operatively connected to the first axle shaft and the second axle shaft. The chamber is at least partially disposed within the differential.

A tire pressure management system includes at least an axle, a hubcap supported by the axle and having an interior and an exterior, and a rotary union mounted to the hubcap. The rotary union includes at least rotary union housing providing a central bore, a fluid conduit having upstream and downstream ends, and a bearing in contact engagement with the fluid conduit via an inner race of the bearing, and in sliding engagement with a bearing sleeve via an outer race of the bearing. The bearing sleeve in pressing contact with the central bore; and a seal, is disposed between the bearing and the downstream end of the fluid conduit.

A tire inflation system safety valve includes at least an air line disposed between a rotary union and a tire communicating with an axle supporting a hubcap, the rotary union axially aligned with the axle and mounted to the hubcap. The air line facilitating pressurized air transferred between the rotary union and the tire. The tire inflation system safety valve including at least a valve housing providing a valve activation chamber, a fluid conduit, supported by the valve housing, having a downstream end and an upstream end and in fluid communication with the valve activation chamber, and a diaphragm disposed within the valve activation chamber and communicating with the fluid conduit. The diaphragm, in response to the pressurized air of a predetermined pressure, automatically precludes air transfer between the upstream end of the fluid conduit and the downstream end of the fluid conduit.

An assembly for a tire inflation system including a spindle having a fluid conduit. The spindle is coupled with a rotary joint spindle, and the rotary joint spindle includes a fluid conduit in fluid communication with the spindle fluid conduit. A fluid collector ring is located about the rotary joint spindle such that the fluid collector ring may rotate. The fluid collector ring is also in fluid communication with the rotary joint spindle fluid conduit.

A wheel end assembly includes a spindle having a passage formed therein. The wheel end assembly also includes a hub cap assembly. The hub cap assembly has an inner housing and an outer housing. The inner housing and outer housing are in fluid communication via an air passage. An air spindle has an inboard portion and an outboard portion. The inboard portion is disposed in the spindle and the outboard portion is disposed in the inner housing. Also, the air spindle has a fluid passage. The fluid passage is in fluid communication with the passage formed in the spindle and the air passage formed in the hub cap assembly. A rotary air seal is disposed around the air spindle. A rotary oil seal is disposed around the air spindle and is spaced apart from the rotary air seal.

A vehicle operational diagnostics and condition response system includes at least an axle supporting a vehicle frame, a suspension disposed between and secured to each the vehicle frame and the axle, a load detection device interacting with the suspension and communicating with a system controller, wherein the system controller is supported by the vehicle frame, and a vehicle operational lighting system supported by the frame and communicating with the system controller. The vehicle operational lighting system is activated by the system controller in response to load detection data received by the system controller from the load detection device.

The invention relates in particular to a device for transmitting pressurized media, in particular compressed air, or control and/or working pressures between a first fluid duct (4), which is received or formed at least in regions in the interior of a first, in particular transmission-side cardan shaft section (3), and a second fluid duct (6), which is received or formed at least in regions in the interior of a second, in particular wheel-side cardan shaft section (5) which is connected in an articulated manner to an end region of the first cardan shaft section (3), wherein the device has a line section (7) which is fluidically connected to, or can be brought into fluidic connection with, the first and the second fluid duct (4, 6) and the length of which is reversibly changeable.

An axle assembly includes a connection assembly having a stationary portion and a rotary portion. The stationary portion is configured to couple to an inlet airflow assembly configured to be non-movably coupled to a beam housing, the rotary portion is configured to couple to an outlet airflow assembly configured to be non-movably coupled to a steering knuckle, the stationary portion forms a cavity configured to facilitate flow of pressurized air from the inlet airflow assembly to the rotary portion, and the rotary portion forms an airflow path configured to facilitate flow of the pressurized air from the cavity to the outlet airflow assembly.

A steer axle spindle may have one or more channels formed therein. A rotary union may be mounted to a steer axle wheel end assembly. The rotary union may be sealingly connected to a pressurized fluid source through the channel, and sealingly connected to a vehicle tire.

A tire pressure management system for a truck or trailer having a first tire and a second tire, an air pressure supply sealingly connected to the first tire and to the second tire for communication of pressurized air therebetween, and an electronic pressure regulator configured to receive a signal from a load management system and automatically adjust the air pressure setting based on the signal so as to regulate the pressure of air passing from the air pressure supply to the first and second tires.