Workpiece holddown device

Abstract

A workpiece holddown apparatus is shown that includes a post, removably securable to a variety of work tables and benches by a bolt extending through a hole or slot in the work table or bench and received in a threaded bore in one end of the post. An arm assembly consisting of a tubular sleeve is radially disposed on the post for 360.degree. rotational and axial sliding movement thereon, and includes an arm radially extending from and attached to the tubular sleeve at an upward angle taken from a perpendicular of the axis of the post, the arm terminating with an internally threaded bushing in which is threaded a screw having an axis parallel to the post. The screw includes a handle portion and foot portion, the foot portion adapted to contact and press against a workpiece as the screw is tightened. In addition to the clamping force exerted on the workpiece by the screw, the threaded bushing holding the screw, and consequently the attached arm, is moved upwardly as tightening occurs, which creates a moment about the sleeve on the post. The sleeve, having a slight clearance between its inner surface and the post, is axially offset by the upward movement of the arm thus providing a binding action on the post. The workpiece is thus securely held between the work table or bench and the foot portion, in a variety of variable positions.

Dependencies are inferred from the claim text.