A tire pressure monitor cap for monitoring and notifying tire pressure is disclosed. The tire pressure monitor cap comprises a housing and a pressure gauge provided in the housing. The pressure gauge comprises a pressure sensor used for measuring air pressure. The tire pressure monitor cap comprises a microprocessor provided in the housing. The microprocessor is communicatively coupled to the pressure sensor. The tire pressure monitor cap comprises a transceiver communicatively coupled to the microprocessor. The tire pressure monitor cap is coupled to a valve stem assembly. The valve stem assembly is provided in a tire. The pressure sensor monitors tire pressure and communicates to the microprocessor. The microprocessor is configured to notify an electronic device or a dashboard via the transceiver when tire pressure reaches below a predetermined threshold value.

An inflation/deflation system for a tire in tire systems such as those having an inner bladder and an outer ground engaging tire is provided in which the inflation/deflation system is adapted to inflate/deflate a tire, inflate a bladder, and inflate a tire utilizing pressurized air from the bladder. The system utilizes a specialized valve and passageway system which utilizes pressurized fluid to operate a timer wheel valve to inflate the tire and/or bladder without requiring electric power at the wheel and utilizes a low power function to inflate the tire from the bladder. The utilization of the bladder to provide a quick tire inflation is particularly useful in agricultural applications utilizing tire with large volumes.

A wheel assembly may comprise a wheel including a rim defining a radially outer surface and a radially inner surface. The wheel may comprise a radial protrusion and an aperture. The radial protrusion may extend radially outward from the radial outer surface. The aperture may extend radially through the radial protrusion to the radially inner surface. A fuse plug may be disposed in the aperture.

An onboard inflation system for a vehicle such as an agricultural vehicle is disclosed, including a tire mounted on a wheel to form a wheel and tire assembly. The tire includes a tread portion and a tire cavity including an inflation chamber adjacent the tread portion of the tire. A storage chamber is carried by at least one of the wheel and the tire. A compressor arrangement is communicated with both the storage chamber and the inflation chamber. The compressor arrangement is configured to transfer air between the storage chamber and the inflation chamber.

A rotary joint is configured to transfer a fluid between two entities, one of which is in rotary motion with respect to the other. The rotary joint comprises a cylindrical internal element, apt to be fixed to the entity in rotary motion, and a plurality of annular external elements. The external elements comprise at least two head elements, at least two housing elements of respective gaskets, two bearing elements, and at least one fluid inlet. The fluid inlet is placed between said two bearing elements. Housing elements of respective gaskets are arranged externally to the bearing elements, and head elements are arranged externally to the housing elements. The gaskets define an annular shaped sealed area. The sealed area is accessible on one side through said fluid inlet and on the other side through at least one fluid passage channel passing through the body of said internal element.

An in-wheel tire pressure system for use with a rim of a wheel of a vehicle that includes a fluid storage area formed in the rim for holding a quantity of compressible fluid suitable for inflating a tire mounted on the rim, and a micro-compressor mounted on the rim for pressurizing the fluid storage area with the compressible fluid. A wireless electrical charging subsystem may also be included for powering the micro-compressor. The wireless electrical charging system may incorporate a first component associated with the rim and rotatable with the rim, and a second component fixedly mounted to a portion of the vehicle closely adjacent the first component. The system may also include a control for enabling user control over the micro-compressor.

A custom valve stem is adapted to fit in a conventional valve stem opening in a tire rim. The valve stem has a primary air channel for a conventional Schrader-type valve. The valve stem also has a secondary air channel extending within the valve stem between a base of the valve stem and an outlet through the material of the valve stem to atmosphere outside of the valve stem. The outlet can have a screen as a debris air filter. An optional tire pressure monitoring system TPMS sensor couples to the primary air channel independent of the secondary air channel. The secondary air channel comprises an atmospheric hose coupled to an electric air compressor and rechargeable battery disposed within a pressure cavity of the tire for maintaining tire pressure. A motion activated power generator disposed within the pressure cavity recharges the rechargeable electric storage.

A tyre inflation pressure control system including a vehicle wheel having a tyre interior providing a first fluid chamber and an air reservoir providing a second fluid chamber. A first valve arrangement is installed remote from the wheel and is connectable to a pressurised fluid source. A second valve arrangement, suitably mounted on the wheel, is connected to the first valve arrangement by means of first and second fluid connections. The second valve arrangement is controllably operable to connect the first fluid connection to either fluid chamber. Controlled variation of fluid pressure in and between the fluid connections is provided by the first valve arrangement to control said second valve arrangement for operating the tyre pressure control system to connect the second fluid chamber to the first valve arrangement, and to connect the first and second fluid chambers.

The inflation system includes a pump and a dehumidifier fluidly connected between the pump and a reservoir, such as a tire.

An air induction system for filtering a compressible fluid to an electromechanical component mounted on a wheel of a vehicle. The system may make use of a first plurality of float valves arranged in series in a non-linear first flowpath path, with at least one of the float valves forming an inlet for intaking the compressible fluid into the first flowpath, and one being in communication with an inlet of the electromechanical component. Each of the float valves may have a buoyant float valve element therein which is responsive to change position when submerged in water, to close off its respective float valve depending on an angular orientation of the wheel, and thus an angular orientation of the float valve.