Patent ID: 6896018

Claim:
A vacuum valve for a vacuum flitch table, comprising a valve body having an axial passageway with two ends and a transverse passageway in one side of the body intersecting the axial passageway between the two ends, one end of the axial passageway being in communication with a vacuum source; a valve seat formed about the central axis of said axial passageway between said one end and said transverse passageway; a pressure-actuated piston/cylinder unit carried by the valve body at the other end of the axial passageway, the piston of said piston/cylinder unit having a cylinder-enclose end and a projecting end that is reciprocatable within the axial passageway along its central axis, said piston carrying at its projecting end a valve seat closure, the cylinder of said piston/cylinder unit having a pressure inlet on one side of the cylinder-enclosed end of the piston, whereby upon the application of pressure to said pressure inlet, the piston forces the valve seat closure against the valve seat.