An inflation system for tubeless bicycle tires may include a valve, a sealant canister, a pump head, and/or a valve core adapter. The valve, sealant canister, and pump head may collectively facilitate sealant injection into a tire by a user. The valve has an external valve seat, and includes a valve body, a valve stem extending through the length of the valve body, and a retaining mechanism for the valve stem disposed interior to the valve body. The valve stem is configured to move relative to the valve body, such that a resilient seating surface disposed at a proximal end of the valve stem is displaced relative to a valve seat formed by an exterior surface of a proximal end of the valve body.

A tire monitoring system electronic unit suitable for being mounted either on the tire inflation valve or on the internal surface of the tire. The system includes electronics for managing the electronic unit including sensors for measuring parameters of the tire, a microprocessor and a supply battery, and an antenna configured to be mountable on the management electronics; a way of securing the antenna and the electronic managing device to each other; the management electronics thus forming a common base capable of being used with an antenna that can be adapted to the intended location of the electronic unit, either on the tire inflation valve or on the internal surface of the tire.

A mobile electronic device (102, 300), and a method, for obtaining a tyre pressure reading from a tyre pressure sensor module (700) fitted to a valve of a pneumatic tyre (106), a tyre pressure sensor module, a locating feature (304, 400) and a tyre pressure gauge system comprising the above. The mobile electronic device comprising: a transmitter (202) and a receiver (200) to transmit and receive telecommunications signals over a distance of up to 4 cm to obtain the tyre pressure reading; and a locating feature to indicate when the transmitter and/or receiver are located within 4 cm or less of the tyre pressure sensor module. The tyre pressure sensor module comprising an antenna to detect a telecommunications signal from a mobile electronic device over a distance of up to 4 cm, a transmitter (902), a receiver (904) and a pressure sensor (916) to measure tyre pressure.

A TPMS module includes a sensor body with two arcuate surfaces adjacent the opening. A tire valve includes two arcuate portions and a distal portion. A plurality of gripping teeth are disposed on the valve arcuate portions. The valve distal portion is provided in the sensor body opening and arranged such that the valve arcuate portions couple to the sensor body arcuate surfaces. The valve is coupled to the sensor body by the interaction of a seat and a grommet such that the gripping teeth interact with the sensor body arcuate surfaces to maintain an orientation of the valve with respect to the sensor body.

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.

According to one aspect of the present disclosure, a tire pressure sensor structure includes a housing, a tire pressure sensor, a valve connector and a molding body. The housing is with an opening and has a receiving portion and an assembly portion. The receiving portion is located on the inner surface of the housing, and the assembly portion is located between the receiving portion and the opening. The tire pressure sensor is placed into the receiving portion. The valve connector includes a base and a connecting port. The base fixes with the assembly portion for limiting the tire pressure sensor. The connecting port protrudes from the base to connect a valve of a tire. The molding body is formed on the surface of the base and adjacent to the connecting port to close the opening.

An inflation viewing device has a main body which is externally provided with a transparent viewing portion and internally provided with an inner passage where an air path assembly is arranged. An air entrance connector is operatively connected to an external air source and to a first end of the main body. An air exit connector is connected to a second, opposed end of the main body and to an inflation valve. A guide spacer is provided between the air entrance connector and the main body. The guide spacer has an inner passage having a wider section in communication with the inner passage of the main body and a reduced section defining a communication opening with the air entrance connector. A filter is arranged in the communication opening. A plunger, biased by a spring, is slidably arranged within the inner passage of the guide spacer and guide section of the main body inner passage.

A safety valve replaces a tire valve. The valve includes a generally elongate hollow main body having an upper portion, a lower flex hose connector, a side tubular branch having a valve seat with a ball valve, an electronics housing having a battery, motor and a drive pin for the ball valve. The lower flex hose connector is adapted for connection to a flex hose or valve stem of the vehicle tire. The side branch branches from the main body and communicates with the hollow interior of the main body. The side branch has a plurality of air exit apertures at its periphery. The valve seat includes a base with an aperture therein through which the drive pin can extend through to engage the ball valve. The ball valve sits in the base and is biased in the valve seat via a spring to cover the aperture.

A tire pressure gauge includes a first tube having a first end secured to a connector; a joining member having a first end secured to a second end of the first tube; a check valve in the joining member and including and air outlet and an air inlet configured to be in fluid communication between the first tube and the air outlet; a spring biased pressure relief device projecting out of the joining member; a second tube threadedly secured to a second end of the joining member; a plunger in a first end of the second tube; a compression spring in the second tube and biased between the plunger and a second end of the second tube; and a rod-shaped measuring device through the compression spring, the measuring device having a first end secured to the plunger and a second end extending out of the second tube.

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.