Patent ID: 7530379

Claim:
A tire inflation system in which tire pressure is continuously maintained during use for multiple tires, the system comprising: an air chamber secured to a hub of a wheel, the air chamber being operable to rotate with the wheel, the air chamber having a plurality of air paths, each air path configured to provide air to a corresponding tire; a shaft configured to remain stationary when the air chamber rotates with the wheel, the shaft having a proximal end and distal end, the proximal end of the shaft extending into the air chamber, the distal end of the shaft being operable to receive the air; an inlet valve configured to provide a continuous flow of air through the shaft into the air chamber, the inlet valve coupled to an air source that provides the air at a pressure above a predetermined maximum tire pressure; a plurality of pressure relief valves, each pressure relief valve disposed on a respective air path of the air chamber, each respective pressure relief valve configured to release air from the corresponding tire when tire pressure rises above an adjustable preset maximum value, the respective pressure relief valve having no effect on tires corresponding to other air paths; a plurality of check valves, each check valve disposed on a respective air path of the air chamber, each respective check valve configured to inject air into the corresponding tire when tire pressure drops below an adjustable preset minimum value, the respective check valve having no effect on tires corresponding to other air paths; and a plurality of pressure gauges, each pressure gauge disposed on a respective air path of the air chamber to provide air pressure for the corresponding tire, wherein each tire pressure is maintained within a range specified by the adjustable preset minimum value and the adjustable preset maximum value.