Patent ID: 7232120

Claim:
A workbench comprising: a frame; a table surface on said frame, said table surface including at least two members, at least one of said members movable with respect to the other member for enabling clamping of a workpiece between said at least two members; a mechanism for enabling movement of said at least one member; said mechanism comprising at least one drive member having a receiving tube and a crank tube, said receiving tube and crank tube coupled with one another for telescoping movement, one of said tubes having a threaded member and the other of said tubes having a thread engaging member; a mechanism for engaging and disengaging said thread engaging member in said threaded member such that when in an engaged position, said crank tube can be rotated in said receiving tube for screw type movement in said receiving tube and when in a disengaged position, said crank tube being freely slidable in said receiving tube.