In order to adjust the tire internal pressure on landing to an appropriate internal pressure, the internal pressure and temperature of the tires when housed inside the aircraft in flight, the temperature and atmospheric pressure around the aircraft, and the altitudes and air temperatures at the takeoff and landing sites of the aircraft are obtained, and a target internal pressure at takeoff is calculated from information relating to the altitude and air temperature at the takeoff airport, after which an in-flight tire internal pressure whereby the tire internal pressure becomes a target internal pressure on landing is calculated from the temperature and atmospheric pressure around the tires of the aircraft, the air temperature and atmospheric pressure at the landing airport, and information relating to a load anticipated to act on the tires on landing, and subsequently the in-flight tire internal pressure is adjusted so that the obtained internal pressure of the tires housed inside the aircraft becomes the calculated in-flight tire internal pressure.

In order to adjust the tire internal pressure on landing to an appropriate internal pressure, the internal pressure and temperature of the tires when housed inside the aircraft in flight, the temperature and atmospheric pressure around the aircraft, and the altitudes and air temperatures at the takeoff and landing sites of the aircraft are obtained, and a target internal pressure at takeoff is calculated from information relating to the altitude and air temperature at the takeoff airport, after which an in-flight tire internal pressure whereby the tire internal pressure becomes a target internal pressure on landing is calculated from the temperature and atmospheric pressure around the tires of the aircraft, the air temperature and atmospheric pressure at the landing airport, and information relating to a load anticipated to act on the tires on landing, and subsequently the in-flight tire internal pressure is adjusted so that the obtained internal pressure of the tires housed inside the aircraft becomes the calculated in-flight tire internal pressure.

A valve-coupler system has a lever that extends under a length axis of the valve body to enable one-handed operation. The valve-coupler body has an opening that is configured over a valve stem and a seal actuator having a lever that can be rotated about a pivot with a single hand to create a seal around the valve stem. Additionally, a valve-coupler may have a gas inlet valve that can be activated by the same single hand to open the valve and allow gas to flow into the valve stem. The inlet valve may be configured in line with the lever whereby the inlet valve is opened when the lever is rotated about the pivot to contact the inlet valve. The inlet valve may be configured on the valve body for manipulation by a user's finger or thumb. The inlet valve may be on the top of the valve body.

A valve-coupler system has a lever that extends under a length axis of the valve body to enable one-handed operation. The valve-coupler body has an opening that is configured over a valve stem and a seal actuator having a lever that can be rotated about a pivot with a single hand to create a seal around the valve stem. Additionally, a valve-coupler may have a gas inlet valve that can be activated by the same single hand to open the valve and allow gas to flow into the valve stem. The inlet valve may be configured in line with the lever whereby the inlet valve is opened when the lever is rotated about the pivot to contact the inlet valve. The inlet valve may be configured on the valve body for manipulation by a user's finger or thumb. The inlet valve may be on the top of the valve body.

A portable inflator includes a housing having or including a compressor. The housing may also contain or include a handle and stand. The housing has an outer surface at least in part formed or constructed of a light reflective material. Suitable light reflective materials can include reflective plastic materials or the like.

The present invention relates to tire inflation tools, the Tire Air Extension according to one embodiment of the present invention comprise of; a tire air valve, a dual air chuck both made onto opposite ends of a piece of light hollow metal 30 length, with diameter. The present invention allows tire to be inflated from an upright, standing position. To inflate. Place dual air chuck onto tire air valve, then take air pump hose air chuck and place it onto the present invention tire air valve, then apply pressure. The air flows through the present invention objects and then into the tire.

The present invention relates to tire inflation tools, the Tire Air Extension according to one embodiment of the present invention comprise of; a tire air valve, a dual air chuck both made onto opposite ends of a piece of light hollow metal 30 length, with diameter. The present invention allows tire to be inflated from an upright, standing position. To inflate. Place dual air chuck onto tire air valve, then take air pump hose air chuck and place it onto the present invention tire air valve, then apply pressure. The air flows through the present invention objects and then into the tire.

A control system for an air maintenance tire system is provided. The control system includes a sensor unit that in turn includes a pressure sensor for measuring a pressure in the tire cavity and an antenna for transmitting pressure data. A processor receives the pressure data and includes a memory for storing a predetermined low-pressure threshold. Actuation means that are in communication with the processor and actuate and de-actuate operation of the air maintenance tire system. A first signal is transmitted from the processor to the actuation means to actuate operation of the air maintenance tire system when the measured pressure in the tire cavity is below the threshold. A second signal is transmitted from the processor to the actuation means to de-actuate operation of the air maintenance tire system when the measured pressure in the tire cavity is at or above the threshold.

A tire inflation pressure control device of this disclosure may be a handheld device temporarily connected to a valve stem of a tire and used to check, add, or reduce pressure as needed. One or more ports of the device may share these functions. In other embodiments, the device may be attached to a rim of the tire and include a toroidal-shaped pressure chamber. Pressure may be increased using an installed pressurizer or one that is temporarily connected when needed. In some embodiments, the pressurizer is a CO.sub.2, nitrogen, or nitrogen/argon gas cartridge. Likewise, a pressure gauge may be installed or temporally connected when needed, and used at the same time as the pressurizer.

An on-line wheel airtightness detecting device where a centering device centers a wheel above a roller bed, and a sixth cylinder causes arms to drive clamping jaws through a second gear, second racks, and fifth guide rails to clamp the wheel; a servo motor turns the wheel 90; a fifth cylinder drives the wheel to a support roller through a fourth guide rail; a second cylinder drives the wheel through first guide pillars; a first cylinder drives the wheel through a first guide rail and flush with a right rubber disc; the hydraulic cylinder drives a left rubber disc through second guide pillars; a motor drives a hollow shaft and the wheel to rotate through a small pulley, a large pulley and a synchronous belt; and compressed air is charged into the hollow shaft, to detect air tightness.