Patent ID: 7789950

Claim:
An air dryer used in a compressed air system, the air dryer comprising: an oil coalescing element for agglomerating oil in compressed air passing through the oil coalescing element in a first direction during a charging cycle and passing through the oil coalescing element in a second direction during a purging cycle; a drying material, downstream of the oil coalescing element during the charging cycle and upstream of the oil coalescing element during the purging cycle, for reducing moisture in the compressed air during the charging cycle; a first oil separating element for reducing the agglomerated oil from the compressed air; a second oil separating element for reducing the agglomerated oil from the compressed air, wherein the first oil separating element is downstream of both the oil coalescing element and the second oil separating element during the charging cycle; a first compressing element contacting an end of the first oil separating element, which does not contact the oil coalescing element; and a second compressing element contacting an end of the second oil separating element, which does not contact the oil coalescing element; wherein the first and second compressing elements compress the oil coalescing element via the first and second oil separating elements, respectively.