Patent ID: 8459624

Claim:
A clamp head comprising an arched body having upper and lower faces, a vertex and opposing unequal length arms, the body further having a through aperture for a bolt or like threaded fastener extending between the upper and lower faces in the region of the vertex, the aperture in the upper face being oval and tapering outwardly through the body in the direction of the lower face, wherein the arms comprise a reaction arm having at its distal end a reaction portion and a clamping arm having at its distal end a clamping portion, the reaction and clamping portions having formations formed therein and thereby being provided with respective integral formations, and wherein the formations of the reaction arm extend in a direction which is substantially perpendicular to the direction of the formations of the clamping arm, wherein the reaction portion of the reaction arm is rounded and the formations of the reaction arm comprise at least one ridge and at least one trough which extend across the reaction portion of the reaction arm from one side of the reaction arm to the other, and wherein the formations of the clamping portion of the clamping arm comprise a plurality of teeth.