Patent ID: 7981194

Claim:
An air drying arrangement, comprising: a single air dryer body; a plurality of desiccant containing canisters in fluid communication with the air dryer body for drying compressed air received from the body; and a unitary coupling device positioned between and removably attached to the air dryer body and the plurality of desiccant containing canisters; the unitary coupling device including: a first and second fluid passage, each of the first and second fluid passages being in fluid communication with a respective one of the plurality of desiccant containing canisters, wherein compressed supply air flows in substantially the same direction at substantially the same time through each of the first and second fluid passages in substantially equal amounts; and an inner chamber in fluid communication with a purge air fluid passage, wherein the inner chamber is further in fluid communication with a third and fourth fluid passage for receiving the purge air in substantially the same direction at substantially the same time for regenerating the desiccant in the canisters.