Patent ID: 6513542
Filing Date: 2003-02-04
Classification: G01M,Y10T

Abstract:
A liquid supply or drain conduit system equipped with a leakage detector comprising:a first valve of the normal closed type having an inlet and an outlet, a first conduit for feeding a liquid into said inlet of said first valve, a second conduit of T-shape having a horizontal portion and a vertical portion, said horizontal portion of the second conduit being in fluid communication with said outlet of said first valve for flowing said liquid into a reservoir tank when said first valve is in an opened state, a second valve of the normal-open type except when said first valve is in an opened state having an inlet and an outlet, said inlet of said second valve being in fluid communication with said outlet of said first valve and situated under said first valve in such a way that said inlet of said second valve receives through said vertical portion of said second conduit a leaked flow of liquid by gravity when said first valve is supposed to be in a closed state but failed to close, and a leakage detector positioned under and in fluid communication with said outlet of the second valve for detecting a flow of liquid through said second valve, when said first valve is in a closed state and said second valve is in an opened state.