A system for detection of non-pneumatic tire loading includes a non-pneumatic tire. The non-pneumatic tire includes a ground-contacting annular tread, a central rim, and at least one spoke disk disposed between the rim and the tread. The spoke disk includes an inner ring mounted on the central rim, an outer ring, and spokes extending radially between the inner ring and the outer ring. A shear band is disposed between the outer ring of the spoke disk and the tread. A flange is disposed on an outboard surface of the spokes of the spoke disk. Indicating means are formed on the outboard surface of the plurality of spokes of the spoke disk radially outwardly of the flange. The flange interfaces with the indicating means when the tire is in an overloaded state or is in need of replacement.

A tire pressure management system includes at least an axle enclosing a pressurized fluid, a hubcap supported by the axle and having an interior and an exterior, a rotary union axially aligned with the axle and 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, a first bearing and a second bearing. Each of the bearings are in contact engagement with the fluid conduit via an inner race, and in pressing engagement with a bearing sleeve via an outer race, the bearing sleeve in pressing contact with the central bore; and a first and second seal, the first seal is disposed between the first bearing and the downstream end of the fluid conduit, and the second seal is disposed between the second bearing and the upstream end of the fluid conduit.

A hubcap and rotary union, the hubcap having the outer face forming a smooth-bore at the center of the face, and a rotary union body having a smooth lug, the smooth lug being rotatably disposed in the bore.

A rotary union for a tire inflation system includes a body having a first end and a second end, the first end comprising threads for threaded coupling to a hubcap, the body forming a fluid channel extending from the first end to a surface of the body; a sleeve rotatably disposed on the body, the sleeve comprising a hose connection port, the sleeve being sealed to the body such that fluid may flow along a sealed path from the fluid channel to the hose connection; and a tubular member having a first end sealingly disposed in the fluid channel at the first end of the body.

An air inflation system is provided for a vehicle including an axle that supports a wheel and an air supply structure. The air inflation system includes a rotary coupler having a tubular member for communicating with the air supply, a sleeve member connected to an end portion of the tubular member, a bearing receiving the sleeve member, a housing body having a passageway therethrough, wherein the tubular member is received in the passageway, and a housing cap attached to the housing body, wherein the housing cap is provided for communicating with at least one air connection element in communication with the wheel. A first seal for sealing an area between the tubular member and the housing body, and a second seal for sealing an area between the housing body and the housing cap are included. The rotary coupler is provided for supplying air from the air supply to the wheel.

A system for detection of non-pneumatic tire loading includes a non-pneumatic tire. The non-pneumatic tire includes a ground-contacting annular tread, a central rim, and at least one spoke disk disposed between the rim and the tread. The spoke disk includes an inner ring mounted on the central rim, an outer ring, and spokes extending radially between the inner ring and the outer ring. A shear band is disposed between the outer ring of the spoke disk and the tread. A flange is disposed on an outboard surface of the spokes of the spoke disk. Indicating means are formed on the outboard surface of the plurality of spokes of the spoke disk radially outwardly of the flange. The flange interfaces with the indicating means when the tire is in an overloaded state or is in need of replacement.

A hub cap assembly with a retaining device (100), and at least one housing portion (34) with an annular recess (98) in an inner surface with a sight glass (12) disposed in the annular recess and positioned axially between the retaining device and the housing portion. The hub cap assembly can be part of a wheel end assembly for use with a central tire inflation system (CTIS).

An on-board centralized system for regulating pressure of tyres of a vehicle includes a pressurized air source, a circuit communicating the source with a plenum of each wheel, and an arrangement for connecting the plenum of each wheel to the inner chamber of the respective tyre that includes first and second connection lines for deflation and inflation, respectively, of the tyre, and first and second one-way valves interposed, respectively, in the first and second connection lines to allow only a flow of air respectively from and to the inner chamber. The first valve includes a spring having a pre-set load so as to isolate the inner chamber from a part of the circuit upstream of the first valve when said upstream part is at atmospheric pressure, and to guarantee a pre-set minimum value of pressure in the inner chamber when the upstream part is at a pressure lower than atmospheric pressure.

A pressure equalization valve assembly may include a valve body forming fluid chamber configured to receive pressurized fluid from a fluid pressure source, a first port configured for sealed communication with a first vehicle tire, and a second port configured for sealed communication with a second vehicle tire; a first one-way valve disposed in the valve body between the fluid chamber and the first port so as to allow one-way fluid communication from the fluid chamber to the first port when the first one-way valve opens; a second one-way valve disposed in the valve body between the fluid chamber and the second port so as to allow one-way fluid communication from the fluid chamber to the second port when the second one-way valve opens; and a two-way valve disposed in the valve body between the first port and the second port so as to allow two-way fluid communication between the first port and the second port when the two-way valve opens.

An assembly for an ATIS that includes a tire inflation valve and a tire deflation valve, and further includes a safety valve that is configured to receive the tire pressure, deflate a tire when tire pressure is too high such as due to braking heat, road friction, ambient temperature, or other reasons. The safety valve prevents deflation of the tire through the deflation valve in the case of low source pressure, such as the pressure source fails or a leak in the source pressure system lines. The assembly is designed to be quickly serviced in the field, where the serviceable parts are very inexpensive. Multiple devices can be installed in parallel with the others, with one device per tire or tire set. The assembly can be a block configured to be attached to a hub cap of a vehicle. It also enables a sensor placement on the hub cap for hub temperature sensing as well as tire pressures sensing and reporting.