Work-holding clamp with pivotable and slideable clamping screws

A clamp comprising:

• two C-shaped plates, aligned and arranged in planes parallel to each other;
• support means for assuring uniform separation between said plates throughout their length;
• two screws for applying clamping pressure, each of which is pivotably attached to said two plates, one screw at each end of the C-shape of said plates;
• and
• a third screw for applying clamping pressure, which is slidably attached to said two plates, between the ends of the C-shape of said plates;
• removable bearing faces, one attached to one end of each of said first two clamping screws and one to the end of said third clamping screw pointing toward the center of the C-shape, which bearing faces, when removed, allow removal of the corresponding clamping screw for replacement;
• said support means including two blocks pivotably attached between said two plates, one attached at each end of the C-shape, each of said first two clamping screws being threaded through said blocks such that when said blocks pivot about their point of attachment said screws also pivot about the same point, and a third block slidably attached between said two plates and between said first two blocks, said third clamping screw being threaded through said third block such that as said third block slides along the C-shape of said plates, the angle of said third screw with respect to said plates changes;
• and wherein the opposite end of each of said first two clamping screws terminates in a hook-shaped portion, and the opposite end of said third clamping screw terminates in an enlarged knob, such that said clamp can also be employed as a gear puller.