Patent ID: 6089801
Filing Date: 2000-07-18
Classification: B25B,Y10T

Abstract:
A machine tool comprising:a base member;a table mounted on said base member having a workpiece support surface, a plenum and at least one port in said workpiece support surface communicating with said plenum;means communicable with said plenum for producing a vacuum therein;a check valve including a body disposable in one of a first orientation and a second orientation on said table in obstructing relation with said port, having a passageway therethrough intercommunicating said plenum and the exterior of said table when said body is disposed in said obstructing relation, and a valve element disposed in said body passageway displaceable between a first position under said first orientation obstructing said body passageway and a second position under said second orientation unobstructing said body passageway; anda tool operatively engageable with a workpiece supported on said table overlying said body passageway when said valve element is in said second position under said second orientation.