Patent ID: 8757232

Claim:
A system for adjusting gas pressure in a wheel tire comprising: a compressed gas tank comprising compressed gas at a pressure higher than atmospheric pressure; a hollow axle with an open end and a closed end, at least one hollow axle hole and an outer circumference; a fill-purge valve in air flow connection with the compressed gas tank; an axle air-port in air flow connection with the fill-purge valve and with the open end of the hollow axle; an axle sheath having an inner circumference at least partially around the outer circumference of the hollow axle and having at least one axle sheath hole in air flow connection with the at least one hollow axle hole; at least two static o-rings between the axle sheath and the hollow axle, with the at least one axle sheath hole and the at least one hollow axle hole located between the at least two static o-rings; at least two dynamic seals each having a inner lip around an outer circumference of the axle sheath, with the at least one axle sheath hole and the at least one hollow axle hole located between the at least two dynamic seals; a hub having an inner circumference in air-tight connection with the at least two dynamic seals and having; a radial trough in the hub inner circumference, with the radial trough in air flow connection with the at least one axle sheath hole; and a hub air-port in air flow connection with the radial trough and with a wheel tire.