Abstract: Clamp apparatus comprising a base, a rocker arm mounted at a location intermediate first and second portions thereof to the base for pivotal movement in opposition to the base, a first clamp element carried by the first portion, power transfer structure supported movably by the base and having drive and driven ends, a second clamp element carried by the driven end in substantial opposition to the first clamp element, and carried adjacent the second portion, a drive element responsive to application of a first force for exerting a second force to the drive end for pivoting the rocker arm to force the first clamp element against a work piece positioned between the first and second clamp elements, and for moving the power transfer structure to force the second clamp element against the work piece.

Abstract: A clamping member is urged to move in a first direction along a path substantially parallel to a work supporting surface in response to the application of a single linear force, such as a fluid actuated motor. Stop means limit the travel of the clamping member in the first direction. In response to continued force applied by the fluid motor, the clamping member is caused to move in a second direction anchoring a workpiece to the work supporting surface.

Abstract: A stationary base includes a planar surface and a bore having an axis lying in a plane parallel to the planar surface. A slide element having a planar surface slidably disposed against the planar surface of the base, is attached to a reciprocally movable shuttle slidably disposed within the bore.