US Patent 7302741 Hose clamp and spring liner

An improved hose clamp having an annular band with an inner face, tensioning means, and an annular spring liner. The spring liner includes an outwardly projecting circumferential ridge; an inwardly projecting circumferential ridge on each side of the outwardly projecting ridge; and a circumferential shoulder near each circumferential edge of the spring liner; and the shoulders are adapted to abut the inner face of the annular band in the absence of clamp tensioning forces. The outwardly projecting ridge may or may not abut the inner face in the presence of clamp tensioning forces.