Patent ID: 6764243
Filing Date: 2004-07-20
Classification: F16J,Y10T

Abstract:
A boot comprising:first and second mounting parts formed at two axial ends, a bellows part extending between the first and second mounting parts, and a longitudinally extending open part having first and second split end parts and extending between the two axial ends, the first and second split end parts of the open part being mutually opposed, the first and second split end parts of the open part having a protruding part and a recessed part, respectively, extending between the two axial ends, the protruding part having a step-shaped hook, and the recessed part having a step-shaped hook corresponding in shape to the step-shaped hook of the protruding part so that the step-shaped hook of the protruding part is locked by the step-shaped hook of the recessed part in an unjoining direction in a hook position after the protruding part is positioned in the recessed part, whereby, after they are hooked to each other, unhooking them in the unjoining direction is avoided, an overlapping extending part protruding from the recessed part so that the overlapping extending part guides the protruding part when the protruding part is inserted into the recessed part, the step-shaped hook of the protruding part being within the recessed part when the step-shaped hook of the protruding part is locked by the step-shaped hook of the recessed part, wherein, when the step-shaped hook of the protruding part is locked by the step-shaped hook of the recessed part, the overlapping extending part covers the recessed part and the protruding part, the protruding part and the overlapping extending part being formed only at each inner peripheral side of the first and second split end parts so that, when the step-shaped hook of the protruding part is locked by the step-shaped hook of the recessed part, the inner peripheral side bulges inwardly, but an outer peripheral side of each of the first and second split end parts does not bulge outwardly, the outer peripheries of the first and second split end parts being arranged at a same level in the hook position, wherein all of the first and second mounting parts, the first and second split end parts, the bellows part and the overlapping extending part are integrally made of a same material.