Patent ID: 6427848
Filing Date: 2002-08-06
Classification: B01D,B23H,C02F

Abstract:
A dual fabrication liquid circulatory system for an electric discharge fabrication machine comprising:a) a water storage tank; b) an oil storage tank; c) an oily-water mixture filtration tank located above the water and oil storage tanks and adapted to receive an oily-water mixture therein, the oily-water mixture filtration tank including: a water discharge pipe having a water inlet within the oily-water filtration tank and communicating with the water storage tank; and an oil discharge pipe having an oil inlet within the oily-water filtration tank and communicating with the oil storage tank, wherein the oil inlet is located higher than the water inlet; d) a valve located in the water discharge pipe; and, e) high and lower water level sensors located within the oily-water mixture filtration tank, the low water level sensor located adjacent to and above the water inlet and the high water level sensor located adjacent to and below the oil inlet, the water level sensors controlling the valve such that the valve is closed when a water level in the oily-water mixture filtration tank is below the low water level sensor and remains closed until the water level reaches the high water level sensor, at which time the valve opens and remains open until the water level reaches the lower water level sensor, at which time the valve is closed.