Patent ID: 6502809
Filing Date: 2003-01-07
Classification: B25B

Abstract:
A fixture for holding workpieces on a machine tool table, said fixture including:a base plate for placement upon table rails of said table, said base plate including an upright center block and releasable locking means to lock said base plate to said table rails said locking means including a locking plate on the underside of said base plate, said locking plate rotatable in a horizontal plane between a locking position in engagement with said table rails, and an unlocked position clear of said table rails and to unlock said base plate for sliding movement along said table rails; a slide block mounted on said base plate and slidable therealong toward and away from said center block, said slide block including releasable clamping means to clamp said slide block to said base plate and to release said slide block for sliding movement along said base plate, said clamping means including a clamp screw extending down through said slide block and said base plate, and means to tighten and loosen said screw relative to the underside of said base plate; and a fluid-operated piston mounted on said slide block for reciprocal movement toward and away from said center block said piston including a cantilevered pusher facing said center block to releasably clamp a workpiece thereagainst.