Tonneau cover system and clamp

A tonneau cover system for a cargo box of a pickup truck, the cargo box comprising a ledge and a flange extending downwardly from the ledge, the tonneau cover system comprising:

• a tonneau cover for covering the cargo box;
• and
• a clamp for securing the tonneau cover to the cargo box, the clamp comprising:
• a first clamp member pivotably coupled to the tonneau cover at a proximal end and having a distal end;
• a second clamp member having a proximal end pivotably coupled to the distal end of the first clamp member, and the second clamp member having a distal end comprising a portion extending at an angle relative to the proximal end of the second clamp member and toward the tonneau cover;
• and
• an elongate member coupled to the proximal end of the first clamp member and extending through an opening intermediate the proximal and distal ends of the second clamp member;
• wherein sliding movement of the second clamp member along the elongate member causes the first and second clamp members to pivot relative to each other between an unclamped position and a clamped position in which the distal end of the second clamp member extends adjacent the flange and engages a first clamping surface of the distal end of the second clamp member against an interior surface of the ledge.