Air pump pressure control system for inflating pairs of automotive tires

Claim 1

An air pressure control system for verifying and adjusting air pressure simultaneously in a pair of vehicle tires, said system comprising a pair of air conduits having valve connectors at a free end thereof for connecting said conduits to a respective one of a pair of vehicle tires, said conduits being interconnected together at a junction to equilibrate air pressure in said pair of tires, an air pressure reservoir having air under pressure stored therein, a compressor feeding said reservoir, said compressor being operated by a pressure switch connected to said reservoir when air pressure in said reservoir drops below a predetermined level, a purge valve connected to said reservoir to evacuate water condensate within said reservoir, said purge valve being operated momentarily by switch means connected to said compressor actuated each time said compressor is operated, valve means connecting said air pressure reservoir to said junction in an inflating mode to inflate said tires and to evacuate air from said tires in a deflating mode, said valve means being comprised of a first normally closed valve interconnected between said junction and said pressure reservoir to direct air pressure to said junction and both said tires of said pair of tires, and a second normally closed valve interconnected between said junction and outside atmosphere to evacuate air from said junction and said pair of tires, and pressure sensing means in the form of a transducer and connected to a conduit between said first and second valves, connected in association with said valve means and said junction to convert pressure sensed at said junction into an electrical signal to be representative of the air pressure equilibrated between said pair of tires, display means connected to said transducer to visually indicate said equilibrated pressure at said junction to determine if said valve means should be actuated and in which mode it should be placed at.