Patent ID: 6467343
Filing Date: 2002-10-22
Classification: G01F

Abstract:
A liquid level gauge for a tank holding a liquid, comprising:a first tube folded about an intermediate portion to define an inner section and an outer section extending downward from said intermediate portion, wherein said intermediate portion is adapted to be positioned at a top of said tank, said inner section is adapted to be generally positioned in said tank and said outer section is adapted to be generally positioned vertically outside said tank down to about a lower end of said tank; a flexible bladder attached to an inner end of said inner section of said first tube and adapted to be immersed in said liquid at a bottom of said tank; a transparent tube communicably connected to a lower end of said outer section of said first tube and extending upwardly toward said intermediate portion of said first tube; and an indicator fluid received in said bladder and said first tube, wherein said indicator fluid is free to flow into the transparent tube from said first tube, said indicator fluid automatically rising in said transparent tube to a level adapted to be about equal to a level of said liquid in said tank.