Abstract: A valve stem cap to be coupled with the inlet/outlet end of a tire valve stem includes a connecting seat having a closed end fitted with a sealing washer and an open end having a threaded hole for coupling with the tire valve stem. An external thread is formed on an outer tubular surface of the connecting seat near the closed end for coupling threadingly with a threaded hole of a light penetrable cover and thereby enclosing a light-emitting unit in the light penetrable cover. The light-emitting unit includes first and second conductive plates electrically connected by a conducting element and at least one battery. When the tire valve stem, coupled with the valve stem cap, leaks, a light-emitting diode on a top surface of the first conductive plate emits light as an alert. Meanwhile, the valve stem cap stops the leak so as to maintain an acceptable tire pressure.

Abstract: A valve stem assembly for tire pressure detecting systems has a valve stem, a connector and a tire pressure detector. The valve stem is conductive. The connector is connected coaxially on the valve stem and is conductive and has a connecting section. The connecting section has an adjusting slot and a domical end. The adjusting slot is formed through the connecting section. The tire pressure detector has at least one tab and at least one conducting washer, the at least one tab protrudes from the tire pressure detector, corresponds to and is adjustably mounted on the connecting section. The at least one tab has a tab slot being formed therethrough. A bolt assembly is mounted in the tab slot and the adjusting slot to hold the tire pressure detector on the connector.

Abstract: A method and apparatus in accordance with embodiments of the invention includes a tire pressure detection device comprising an elongated casing having a first casing portion and a second casing portion, configured to house a pressure sensor and the battery therein. The elongated casing also includes a mounting hole for accommodating a connection member configured to connect the casing to a tire valve. The mounting hole is disposed, in one embodiment, and at approximately longitudinal center portion thereof. The first casing portion and the second casing portion are joined to each other by joint portions comprising a hook formed on one of the first casing portion and the second casing portion, and a hook hole formed in another of the first casing portion and the casing portion. The joint portions are located around the mounting hole and both longitudinal ends of the casing. The casing is configured such that a tire valve penetrates a rim of the tire wheel from an outside to an inside thereof.

Abstract: A tire pressure monitoring sensor includes resilient spring members to support and resist movement during rotation of the wheel.

Abstract: A valve stem assembly for tire pressure detecting systems has a valve stem, a connector and a tire pressure detector. The valve stem is conductive. The connector is connected coaxially on the valve stem and is conductive and has a connecting section. The connecting section has an adjusting slot and a domical end. The adjusting slot is formed through the connecting section. The tire pressure detector has at least one tab and at least one conducting washer, the at least one tab protrudes from the tire pressure detector, corresponds to and is adjustably mounted on the connecting section. The at least one tab has a tab slot being formed therethrough. A bolt assembly is mounted in the tab slot and the adjusting slot to hold the tire pressure detector on the connector.

Abstract: A valve stem with an adjustable tire pressure detector has a tire pressure detector, a valve stem body, a conducting member and a fastening assembly. The tire pressure detector has a guiding slot, a concave surface and a convex surface. The guiding slot is formed through the tire pressure detector and forms two openings. The concave surface and the convex surface are formed on the tire pressure detector respectively adjacent to the openings. The valve stem body is moveably mounted through the guiding slot and has a head being moveably mounted on the concave surface. The conducting member is mounted on the concave surface or the convex surface and is electrically contacted to the valve stem body and the tire pressure detector. The fastening assembly mounts the valve stem body on a rim securely.

Abstract: Tire sensor packaging capable of being installed on a standard snap-in tire valve stem is provided. The sensor package includes an attachment member capable of being disposed in the flexible bore of a snap-in tire valve stem, and of securely engaging with the inner wall of the flexible bore. The attachment member can be an integral part of the sensor package, or it can be a separate part that acts as an expansion device (e.g., an expansion nut) when engaged with the sensor package. Preferably, the attachment member includes features, such as barbs, to provide more secure engagement with the tire valve stem. Packages according to embodiments of the invention include a package passage (e.g., a channel or a bore) to permit the flow of air past the sensor, so that the tire can be inflated or deflated. Sensors can be attached to the tire valve stem before or after the tire valve stem is installed in the wheel.

Abstract: A system for air injection into tires, comprising a rotary air chamber secured to a hub cap wherein the rotary air chamber is configured to inject air into at least one tire when tire pressure drops below a first adjustable preset value and to release air from the at least one tire when tire pressure rises above a second adjustable preset value, an air shaft extending through the hub cap and into the rotary air chamber, an air line attached to the air shaft, and ball bearings affixed between the air shaft and the hub cap. A bracket can be fastened to the hub cap such that the rotary air chamber is fastened to the bracket. The hub cap and air shaft are fastened to the axle such that an air line extends from inside the axle through the air shaft to the rotary air chamber.

Abstract: Provided is a tire pressure monitoring system including: a tire pressure measurement sensor including a pressure detection means for detecting an air pressure in a tire, a connection pipe for connecting an air injection valve of the tire to the pressure detection means, a fixing means for fixing the connection pipe to the air injection valve of the tire, and an air injection means connected to the pressure detection means to inject air into the tire through the pressure detection means; and a display for showing the air pressure of each tire of a vehicle to a driver, wherein the tire pressure measurement sensor is mounted in the air injection valve of the tire and transmits a pressure value of the tire to the display through wireless communication.

Abstract: A tire pressure gauge for attachment to a valve stem includes a wall defining a chamber having a first port adapted to sealingly engage a valve stem, a probe being mounted in the first port so as to open a valve of a valve stem sealingly engaged by the first port, a pressure sensor in the chamber, a memory, a display physically supported on the device, a processor being operatively coupled to said display, pressure sensor and memory; and code being stored in the memory and operable by the processor to: retrieve at least one value indicative of a first threshold tire pressure from the memory, determine a pressure sensed by the pressure sensor, and, cause the display to present information indicative of a relative value of the sensed value to the first threshold tire pressure.

Abstract: A method and a device for detecting intrusion into or tampering with contents of an enclosure. According to the method at least one gas proof seal-barrier is provided in association with the enclosure and a first environment is produced within said gas proof seal-barrier. Said first environment is different regarding at least one characteristic feature from a second environment surrounding said gas proof seal-barrier. At least one detector is arranged within said gas proof seal-barrier for detecting a predetermined change of the characteristic feature of the said first environment. Said detector is transferred irrevocably from a first state to a second state when there is a predetermined change of the characteristic feature, and the state of the detector is supplied to a position outside said gas proof seal-barrier.

Abstract: A snap-in tire pressure monitoring system having a valve that deforms to form an annular sealing surface around an opening in a tire rim. A sensor housing having electronics components configured to sense conditions within the tire may be attached to the valve. Data collected by the components may be wireless transmitted for further processing.

Abstract: A tire pressure sensor including a body, a sealing member and a circuit and signal transmission apparatus is provided. The body includes a first casing, a first hole, a receiving portion and a second casing. The receiving portion connects with the first hole passing through the first casing. The sealing member includes a second hole that is set through the rubber component of and communicates with the first hole. The sealing member is located in the receiving portion. The circuit and signal transmission apparatus includes a circuit apparatus and a hole. The hole positioned on the surface of the circuit apparatus communicates with the first hole and second hole to form an air seal channel. The air pressure of the tire is injected through the air seal channel into the hole, and the tire pressure sensor can detect the pressure and temperature of the air of the tire.

Abstract: A valve stem installation system (10) includes a conveyor (24) for moving wheel rims (14). A detector (50) is comparable with the conveyor (24) to detect size of the wheel rim (14) and a location of an aperture (12) of the wheel rim (14) to receive various valve stems (16, 18). Two robots (110, 112) are adaptable for matably moving the valve stem (16, 18) to the wheel rim (14). A controller (60) is operably communicated with the robots (110, 112) and the detector (50) for receiving a signal from the detector (50) as the detector (50) identifies configuration of the wheel rim (14) and then transmitting the signal to the robots (110, 112) thereby directing the robots (110, 112) to selectively engage the valve stem (16, 18) to be inserted into the aperture (12).

Abstract: A fasten device for tire pressure alarm transmitter, which comprises a fasten base for fastening a valve core style transmitter, and a strip for binding the fasten base on wheel rim, wherein: the fasten base has a board shaped support portion, and a hole for accepting the strip to drill through is set on the support portion; a securing board is set on the middle portion of the support portion, and a position slot that matches with the valve core of the transmitter is excavated on the securing board; and a buckle that matches with the securing board is set on one end of the support portion to fasten the transmitter corporately. As the fasten base having a support portion, a buckle and a securing board with position slot are provided on the support portion.

Abstract: An attached tire pressure sensor and air nozzle assembly includes an air nozzle for installation in the rim of a vehicle wheel, an attached tire pressure sensor threadedly coupled with the air nozzle for sensing the tire pressure of the vehicle wheel, and an anti-loosing device sandwiched between the air nozzle and the attached tire pressure sensor. The anti-loosing device has a rigid base stopped against the air nozzle, and a curved spring washer stopped against the attached tire pressure sensor to provide a spring force to the air nozzle and the attached tire pressure for preventing the attached tire pressure sensor from loosing from the air nozzle upon receiving vibration or accidental impact of the vehicle wheel during running of the vehicle.

Abstract: A tire pressure indicator (TPI) (10) that provides a method by which the air pressure in vehicle tires can be easily and reliably checked to determine if the tires are optimally inflated. The TPI (10) is comprised of a valve core (12) that replaces a conventional tire-valve core that is inserted into a vehicle tire stem (170). The valve core (12) includes a diaphragm (64) that controls the vertical displacement of a plunger shaft (80) that controls the contact position of a switch (S1). From the switch (S1) a high or a low tire-pressure signal is transmitted to a tire pressure monitoring unit (160), from where an individual can observe and correct the tire pressure. The TPI (10) features a structure and a method by which false tire pressure signals caused by changes in ambient temperature and normal tire temperature fluctuations are eliminated.

Abstract: An electronic unit for measuring operating parameters of a vehicle wheel, includes an electronic box (1), an inflation valve (2) of the snap-in type composed of a valve body (3) made of an elastomer material provided with an axial bore housing a hollow tubular core (15), and elements for securing the electronic box (1) and the inflation valve (2). The elements for securing the electronic box (1) and the inflation valve (2) include a bushing (20) secured to the electronic box (1) and adapted to be slidably mounted around a portion of the tubular core (15) which extends as a continuation of the valve body (3) and into a position of the electronic box (1) where the latter extends as a direct continuation of the inflation valve (2), and members (13, 25, 26) for assembling the bushing (20) of the electronic box (1) on the valve body (3).

Abstract: A valve stem installation system (10) includes a conveyor (24) for moving wheel rims (14). A detector (50) is cooperable with the conveyor (24) to detect size of the wheel rim (14) and a location of an aperture (12) of the wheel rim (14) to receive various valve stems (16, 18). Two robots (110, 112) are adaptable for matably moving the valve stem (16, 18) to the wheel rim (14). A controller (60) is operably communicated with the robots (110, 112) and the detector (50) for receiving a signal from the detector (50) as the detector (50) identifies configuration of the wheel rim (14) and then transmitting the signal to the robots (110, 112) thereby directing the robots (110, 112) to selectively engage the valve stem (16, 18) to be inserted into the aperture (12).

Abstract: A tire pressure monitoring apparatus includes a pressure transducer and a valve stem. A spring member connects the pressure transducer to the valve stem. The spring member facilitates relative movement between the pressure transducer and the valve stem.

Abstract: A tire pressure detector includes an electrically conductive housing having a housing body and a protruding annular body; a cover having a sleeve portion connected to the protruding annular body, an airtight chamber defined by the cover and the housing for receiving a battery device, a PCB and a first electrically conductive resilient member, the housing body or the cover being disposed with an air intake mouth; and the PCB having a pressure and temperature detecting device. The air intake mouth guides air inside the tire to flow into the airtight chamber. The pressure and temperature detecting device detects the pressure and temperature of the air inside the tire and transmits data to the microprocessor for processing. The microprocessor controls the transmitter to transmit a signal. A receiver disposed near a driver's seat receives and processes the signal and then displays the tire pressure and temperature value on a display.

Abstract: A vehicle tyre data monitoring system has a wheel mounted sensor means that is adapted to transmit one or more of pressure, temperature, angular velocity, and force vector data for a tyre as a digital serial datagram through a two-wire communication channel to a chassis mounted reader means. The communication channel is adapted to simultaneously supply power to the sensor means and receive the data for processing and subsequent display to a user of the system.

Abstract: A tire and wheel rim assembly includes a tire supporting rim having an outward facing mounting surface; a tire mounted to the rim positioning an internal tire cavity over the rim mounting surface; a passageway extending through the rim for communicating air pressure between the tire cavity and a side of the rim opposite the tire cavity; and means for controllably regulating the flow of air through the passageway. A connecting member such as a bolt may extend through the rim outside mounting surface to affix a tire pressure monitoring housing to the rim and the axial passageway through the rim may be an axial bore through the bolt. Regulation of air flow through the passageway may be effected by setting the diameter of the passageway sufficiently small; or incorporating a needle orifice in the passageway; or incorporating a porous insert body into the passageway. The insert body may be composed of sintered metal and may be fused to the internal sidewalls of the bolt.

Abstract: A tire pressure detecting valve stem has a case, a body and a tire pressure detector. The case is rectangular and has an inner surface. The body is a valve stem and is integrally and transversely mounted on the case and has an inner section and a center pin. The inner section is integrally mounted in the case. The center pin is conductive, is coaxially mounted in the inner section and protrudes from the inner surface of the case. The tire pressure detector corresponds to and is mounted on the inner surface and is electronically connected to the center pin. Because the case is integrally and compactly mounted on the inner section of the body, the case will be mounted on and stay close to a rim when the body is mounted through the rim.

Abstract: A first trigger unit and a second trigger unit output trigger signals to transceivers disposed for the four wheels of a vehicle. The first and second trigger units are attached to wall surfaces of tire housings corresponding to the left front and left rear wheels respectively. Each of the first and second trigger units is arranged in a position of the wall surface having an angle from 5 to 25 degrees with respect to the side of the corresponding wheel. Transceivers attached to a right front and right rear wheels are thus located farther from the trigger units than the left front and left rear wheels, respectively. Such arrangement allows the transceivers attached to the right front and right rear wheels to receive the outputted trigger signals with sufficient accuracy due to high field strength.

Abstract: The tire pressure detector and valve stem assembly has a valve stem, a wireless pressure detector and a fastener. The valve stem has an outer section and an inner section. The inner section is integrally and coaxially formed on the outer section and has a distal end, an outlet hole, a sidewall and at least one clamping surface. The at least one clamping surface is flat and is tangentially formed on the sidewall. To assemble, only a regular tool such as a clamp or a spanner is necessary to clamp the inner section on the clamping surface when mounting or dismounting the valve stem onto or from a rim.

Abstract: A tire pressure gauge with a valve cap wrench is disclosed. A bore at one end of the tire pressure gauge may be used to grip and remove a valve cap mounted on a valve stem of a tire. A port at the other end of the tire pressure gauge may be used to measure air pressure in a tire. The measured air pressure may be displayed on a display on the pencil gauge. The cap wrench may have a collet to hold a valve cap and a switch to tighten and loosen grip on a valve cap. The cap wrench may also have a plunger to push a valve cap out of the pencil gauge.

Abstract: A tire pressure monitoring apparatus includes a pressure transducer having a housing and a valve stem secured to the housing. The valve stem projects through an opening in a wheel for holding the tire. A retention clip is secured to the valve stem. The retention clip includes a plurality of spring retention members for engaging the opening in the when the valve stem projects through the opening. The retention members are deflected when the valve stem projects through the opening and have resilient properties that spring bias the retention members against the wheel to help retain the tire pressure monitoring apparatus on the wheel.

Abstract: A tire sensor that communicates to a remote interrogator in one of two modes depending on the nature of the interrogation. The interrogator may be distributed throughout a vehicle if needed for design options. Further, the interrogator only interrogates the transponder when the interrogator has reason to believe that the transponder is in range of the interrogator. The interrogator and transponder may be configured to operate in different modes for communication during operation of the tire on a vehicle and during non-operation. The transponder may communicate tire condition information to the interrogator concerning environmental or other information sensed about the tire.

Abstract: A vehicle protection device includes a wiper externally mounted on the wheel rim as fastened by an inflation valve fixed in the wheel rim, and a sensor holder engaged with the inflation valve and positioned inside the wheel rim for holding a tire pressure sensor within the wheel rim and within a tire; whereby the sensor will sense the tire pressure for safely monitoring the tire pressure; and the wiper will scrape the rain water (or snow) outwardly from the wheel for enhancing driving safety.

Abstract: A vehicle protection device includes a wiper externally mounted on the wheel rim as fastened by an inflation valve fixed in the wheel rim, and a sensor holder engaged with the inflation valve and positioned inside the wheel rim for holding a tire pressure sensor within the wheel rim and within a tire; whereby the sensor will sense the tire pressure for safely monitoring the tire pressure; and the wiper will scrape the rain water (or snow) outwardly from the wheel for enhancing driving safety.

Abstract: A tire pressure indicator that is combined with a fill valve. The indicator and the fill valve are coaxial or concentric. The invention may be screwed onto a tire valve stem. The indicator has three bands or sections, each of which is a different color, for indicating whether tire pressure is within a predetermined range, above that range, or below that range. The colors are viewed through a lens, aided by a mirror. A diaphragm pushes the indicator up when pressure rises, while a spring pushes the indicator down when pressure drops. A tire may be inflated or deflated while the invention is mounted on a tire stem. During inflation, the pin in an air chuck at the end of an air hose may depress a valve pin assembly to open the fill valve. A user may deflate the tire by manually depressing the valve pin assembly to release air.

Abstract: A SAW based tyre pressure sensor assembly comprising a body having a tubular stud 1 formed on an end thereof which is engageable in an inflation tube formed in a tyre inflation valve 3 so as to fasten the body to the valve 3. A through passage extends through the stud 1 into said body and is in fluid communication with the atmosphere surrounding the assembly by means of apertures 2 in the sides of the body, thereby providing a fluid coupling between an inflation duct of the inflation valve 3 and the atmosphere surrounding the body. A SAW based pressure sensor is mounted within said body so as to be in fluid communication with the atmosphere surrounding the body, and an antenna 4 is connected to the sensor to enable remote interaction therewith. A grounding plate 5 connected to the antenna is sandwiched between the assembly and has arms which engage against the inner surface of the wheel so as to enhance the sensor antenna earth.

Abstract: An electronic unit for measuring operating parameters of a vehicle wheel, includes an electronic box (1), an inflation valve (2) of the snap-in type composed of a valve body (3) made of an elastomer material provided with an axial bore housing a hollow tubular core (15), and elements for securing the electronic box (1) and the inflation valve (2). The elements for securing the electronic box (1) and the inflation valve (2) include a bushing (20) secured to the electronic box (1) and adapted to be slidably mounted around a portion of the tubular core (15) which extends as a continuation of the valve body (3) and into a position of the electronic box (1) where the latter extends as a direct continuation of the inflation valve (2), and members (13, 25, 26) for assembling the bushing (20) of the electronic box (1) on the valve body (3).

Abstract: A tire valve unit is secured to a securing hole provided in a rim of a wheel of a vehicle. The tire valve unit includes a tire valve and a tire sensor. The tire valve includes a valve stem and an elastic cylindrical member encompassing the valve stem. The elastic cylindrical member has an annular securing groove in an outer circumferential surface of the elastic cylindrical member. A portion of the rim around the securing groove is fitted in the securing groove when the elastic cylindrical member is passed through the securing hole. The tire sensor is fixed to the valve stem. The tire sensor is arranged in the interior of a tire attached to the rim and capable of detecting the condition of the tire when the tire valve unit is secured to the rim. The elastic cylindrical member defines an annular space around the valve stem. The annular space extends from a position corresponding to the securing groove in an axial direction of the valve stem to communicate with the interior of the tire.

Abstract: A miniature pressure sensor assembly is provided for fitting within the valve stem of a vehicle tire. The pressure sensor assembly typically includes a reference device for temperature compensation and a measurement device for pressure measurement. Each device includes a substrate assembly defining a plurality of holes. A deflectable membrane is mounted to the substrate assembly to define a first chamber. A cap is mounted to the membrane to form a second chamber.

Abstract: A fluid sensor is provided for determining a fluid characteristic, having an electronic sensor element that has an active surface for determining the fluid characteristic, having a mounting plate associated with the sensor element, and having a filter device associated with the sensor element for filtering the fluid, in which the active surface of the sensor element is oriented toward the mounting plate and in which the mounting plate is provided with an opening opposite from the active surface of the sensor element. According to an embodiment the invention, an end region of the filter device is accommodated in a sealed fashion in the opening of the mounting plate. Furthermore, the fluid sensor can be used for tire pressure measurement.

Abstract: A tire pressure monitoring device includes a housing unit, a tire inflating unit, and a tire pressure monitoring unit. The housing unit includes: a tubular body confining an air chamber; a tire coupling seat adapted to couple the tubular body to a tire such that the air chamber is in fluid communication with an interior of the tire; and a cap body formed with an outwardly extending annular flange to engage a retainer part of the tubular body. The tire inflating unit includes an inflating tube connected at one end to the tubular body and in fluid communication with the air chamber, and an inflating valve. The tire pressure monitoring unit is disposed in the tubular body and is covered by the cap body.

Abstract: A tire pressure mounting apparatus is provided including a pressure sensor for sensing the pressure in a tire. The pressure sensor has a housing. A threaded fastener is secured to the housing and forms a first valve portion. A tire valve stem projects through a first opening in a rim for holding the tire. The tire valve stem carries a second valve portion therein. The first valve portion and the second valve portion form a valve when screwed together.

Abstract: A vehicle monitoring system comprises a tire pressure sensor, a transmitter coupled to the tire pressure sensor for wirelessly transmitting a signal indicative of a tire pressure; and a receiver for receiving the signal indicative of the tire pressure and for receiving a signal of a remote keyless entry device. The system further comprises a controller coupled to the receiver for processing the signal indicative of the tire pressure and outputting a status signal, and a status indicator for receiving the status signal and indicating a tire pressure status according to the status signal.

Abstract: Tire sensor packaging capable of being installed on a standard snap-in tire valve stem is provided. The sensor package includes an attachment member capable of being disposed in the flexible bore of a snap-in tire valve stem, and of securely engaging with the inner wall of the flexible bore. The attachment member can be an integral part of the sensor package, or it can be a separate part that acts as an expansion device (e.g., an expansion nut) when engaged with the sensor package. Preferably, the attachment member includes features, such as barbs, to provide more secure engagement with the tire valve stem. Packages according to embodiments of the invention include a package passage (e.g., a channel or a bore) to permit the flow of air past the sensor, so that the tire can be inflated or deflated. Sensors can be attached to the tire valve stem before or after the tire valve stem is installed in the wheel.

Abstract: A tire pressure monitoring system (TPMS) sensor grommet tool has a U-shaped portion adapted to be inserted between a grommet disposed on the stem of a TPMS sensor and a seat at the base of the stem in which the grommet resides to separate the grommet from the seat for removal of the grommet from the TPMS sensor. The tool might also include an installation opening adapted to be disposed about the stem to guide and/or push a new grommet down the stem and into the seat. The leading edge of the tool, and/or and the U-shaped portion, may be beveled, to facilitate insertion of the U-shaped portion between the grommet and the seat. A flat side or ledge of the U-shaped portion may be adapted to separate the grommet from the seat, such as by levering against the seat to lift the grommet from the seat for removal.

Abstract: A tire pressure gauge includes a housing, a tire pressure detection unit, an air valve, and at least two limit members. The housing has a lateral side and a chamber. The tire pressure detection unit is mounted in the chamber. The air valve is mounted to the housing, extending out of the chamber from the lateral side of the housing. The at least two limit members are mounted to the lateral side of the housing and located bilaterally at the air valve, each having an end surface to which the air valve is perpendicular. Accordingly, when the tire passes through the rough roadbed to be violently shocked or impacted, the tire pressure gauge of the present invention remains in original position because of positioning efficacy of the two limit members.

Abstract: A multiple-function valve cap is disclosed for mounting on a valve stem of a tire for indicating a safe pressure condition or a low pressure warning. The multiple-function valve cap includes a pressure indicator assembly having a piston including a safe pressure indicator, and an internal bore. A warning indicator is seated within the internal bore of the piston. A biasing spring is fitted between the low pressure warning indicator and the safe pressure indicator, and acts to urge them apart, such that the warning indicator is displayed when low pressure is applied to the piston. When a safe level of air pressure is applied to the piston, the piston is moved against the force of the biasing spring to surround the warning indicator, and the safe pressure indicator is displayed.

Abstract: An electronic unit for measuring operating parameters of a vehicle wheel, including an electronic module (1) and an inflation valve (2) comprising a body (6, 7) designed to extend through an orifice arranged in a wheel rim, and an assembly head (4) separated from the body by a shoulder forming a face for locking the inflation valve against the rim. The electronic module (1) includes an outer wall (13, 14) defining a lateral housing for the assembly head (4) of the inflation valve (2), delimited by a metal plate (11) made in one piece with the electronic module, for pressing of the locking face of the assembly head, and furnished with a notch for the body (6, 7) of the inflation valve to pass through.

Abstract: A method of detecting a rapid leak of gas contained in an automobile tire based on periodic measurements of a pressure Pa and a temperature Ta of the gas. The method includes determining a reference pressure Pcref, calculating an alarm threshold pressure Sref from the reference pressure Pcref, calculating a temperature-compensated pressure Pc at each measurement acquisition period, and comparing the compensated pressure Pc with the alarm threshold pressure Sref, wherein the leak is detected if the compensated pressure Pc is less than the alarm threshold pressure Sref.

Abstract: A pressure gauge assembly for a bicycle tire includes a gauge portion having an indicator, a shaft, and a lower portion. The shaft includes a recess and a channel portion which is in communication with the recess and the gauge portion. A button is mounted in the recess. The lower portion defines a compartment in communication with the channel portion. Two bushings, respectively, engage two ends of the compartment, and a drive member mounted with an O-ring is included in the compartment. Two holes, respectively, defined on two ends of the drive member are not in communication with each other. A protruding end is defined on an end and a insert end included in another end of the drive member. The drive member is moveable in the compartment.

Abstract: A tire pressure warning assembly includes a tire valve with a switch received therein, which had a conductive member, a movable member and a biasing member. The movable member is located at a distance from the conductive member and one end of the movable member is exposed to the air in the valve and the other end of the movable member is in contact with the biasing member, which exerts a force to the movable member. The tire pressure compresses the biasing member. When the tire pressure is less than the biasing force of the biasing member, the biasing member pushes the movable member to contact the conductive member to form a circuit so that the warning device sends a signal to the driver.

Abstract: A tire monitor radio circuit includes a control circuit delivering a binary digital baseband signal, a modulation circuit having an oscillation circuit generating a carrier wave and switched between an oscillatory and a non-oscillatory states, an antenna resonance circuit having a coil and a capacitor both connected together, a resistance damping circuit having a switching element and a resistance and connected to the antenna resonance circuit, the resistance damping circuit being switchable between an operative and an inoperative states, and a compensation circuit putting the resistance damping circuit into the operative state when the modulation circuit is switched to the non-oscillatory state, the compensation circuit returning the resistance damping circuit to the non-operative state when or before the modulation circuit has been or is switched to the oscillatory state.

Abstract: The inventor discloses and claims a device for signaling the inflation condition of tires, as externally visible or as may be registered by remote audio or visual cues. The device generally is adapted to be attached to the stem valve of a tire without causing substantial loss of air pressure in the tire. The device may be loaded to register the inflation condition of the tire, following which loading the device may continue to register the inflation condition, without causing substantial loss of pressure in the tire.