Circumferential chock with lockable, concave clamping jaws

A circumferential chock comprising:

• jaw members each having a curved concave chocking wall for engaging a wheel;
• a bottom portion having a high-friction surface for preventing slippage of the chock;
• hinge means integrally joining said jaw members for providing movement of said jaw members in relation to each other between an open position for receiving the wheel, and a closed position circumferentially engaging said chocking walls with the wheel for braking the wheel against rolling and swiveling;
• and
• a clamp engaged through said hinge means, said clamp including means for positively but releasably locking said jaw members in said closed position and in a plurality of positions intermediate said closed position and said open position.

A circumferential chock comprising:

• jaw members each having curved concave chocking means having a radius and a slope for engaging a wheel and lever means for maneuvering said jaw members between an open position and a closed position, each said chocking means having a cutout portion for accommodating the lower portion of said wheel;
• a bottom portion having means for preventing slippage of the chock;
• hinge means integrally joining said jaw members for providing movement of said jaw members in relation to each other between said open position for receiving said wheel and said closed position circumferentially engaging said chocking walls with the wheel for braking said wheel against rolling and swiveling, including means for resiliently biasing said jaw members toward said closed position;
• and
• a clamp engaged through said hinge, said clamp including means for positively but releasably locking said jaw members in said closed position, said open position and in a plurality of positions intermediate said closed position and said open position.