Patent ID: 6591860
Filing Date: 2003-07-15
Classification: F16K,Y10T

Abstract:
An apparatus for controlling the level of a fluid in a pit comprising:a float means for tracking the level of said fluid in said pit, wherein said float means comprises a float ball attached to a float rod, said float ball adapted to rise and fall with the level of said fluid in said pit, and a flapper disc assembly fixedly attached to the upper end of said float rod thereby rising, falling and rotating with said float means, said upper end and said flapper disc assembly always remaining at an elevation higher than said pit and said fluid level; means for determining when said fluid level reaches a selected set point level in said pit; and a pneumatic switch for signaling when said fluid rises to said selected set point level in said pit and when said fluid falls below said selected set point level in said pit, wherein said pneumatic switch comprises a nozzle for receiving and expelling a gas therethrough and sealing means on said flapper disc assembly for sealing said nozzle, thereby preventing the flow of gas therethrough, when said fluid level in said pit is at least as high as said selected set point level.