Patent ID: 7559342

Claim:
A flexible hose, comprising: a hose body having an inner passageway and an outer circumferential surface with a substantially uniform diameter; and a plurality of pleats formed on the outer circumferential surface of the hose body in predetermined intervals and adapted to give flexibility to and reduce noise within the flexible hose, wherein at least one of the plurality of pleats comprises: an entering portion inclined with respect to the outer circumferential surface of the hose body, the entering portion being in fluid communication with the inner passageway of the hose body when in an open position, and the entering portion being in the open position when the hose body is expanded lengthwise and in a closed position when the hose body is compressed lengthwise, and a pair of sidewalls extending substantially vertical to the outer circumferential surface of the hose body, and a head portion formed between the pair of sidewalls, the head portion being in fluid communication with the inner passageway of the hose body via the entering portion when the entering portion is in the open position and the head portion not being in fluid communication with the inner passageway of the hose body when the entering portion is in the closed position.