| 主权项 |
1. In combination, a quick-release clamp assembly and a weightlifting bar, the weightlifting bar comprising a longitudinal axis and a cylindrical outer surface, and said clamp assembly comprising:
first and second clamp members pivotally connected together for rotation relative to each other about a pivot axis, said first and second members being pivotally movable about said pivot axis between an open position in which the clamp assembly can be placed on and removed from the weightlifting bar and a closed position in which the clamp assembly is clamped securely onto the weightlifting bar, said pivot axis and said longitudinal axis lying in the same plane when the clamp assembly is clamped onto the weightlifting bar, and said pivot axis being parallel to the longitudinal axis of the weightlifting bar when the clamp assembly is clamped onto the weightlifting bar; said first and second clamp members having first and second inner surfaces, respectively, facing inwardly toward the outer surface of said weightlifting bar when the clamp assembly is in said closed position; said first clamp member having first and second bar engaging structures spaced circumferentially along said first inner surface from said pivot axis; said second clamp member having third and fourth bar engaging structures, said third bar engaging structure projecting inwardly from said second clamp member for engagement with the outer surface of the weightlifting bar when the clamp assembly is clamped onto the weightlifting bar; and a bar engaging portion of said third bar engaging structure being arranged to move from one side of the plane containing said pivot axis and said longitudinal axis to another side of said plane when said first and second clamp members are moved from said open position to said closed position, thereby causing said third bar engaging structure to be held in an over-center condition when said first and second clamp members are in said closed position. |
