Fastening arrangement for open hose clamp

Claim 1

A clamp structure, comprising clamping band means having open ends, and means mechanically interconnecting the open ends of the band means including at least two outwardly extending hook means in an inner band portion operable to engage in aperture means in an outer band portion, at least one of the hook means being a cold-deformed support hook, characterized in that another one of the hook means is a combined guide and support hook, said combined guide and support hook having inclined guide and support surface means operable to initially engage with the corresponding aperture means in the outer band portion, the rear edge of said guide and support surface means sloping upwardly away from the free end of the inner band portion, as viewed in side view of the clamp structure so as to guide the inner and outer band portions with respect to one another while at the same time absorbing circumferentially directed tightening forces until the cold-deformed support hook becomes effective in absorbing tightening forces by engagement of its abutment surface means with the corresponding aperture means while the combined guide and support hook will continue to assist in the support function as it is able to absorb longitudinally directed forces without bending.