Patent ID: 6766688
Filing Date: 2004-07-27
Classification: F17C,G01F

Abstract:
A tank liquid level or volume gauge for use with a tank defining a volume containing volatile materials that are stored as a liquid under pressure and released from the tank for use in gaseous form, comprising:a float member extending into the tank, the float member defining a float chamber configured to allow the float member to float in the liquid; a float magnet joined to the upper portion of the float member; a substantially linear rigid shaft positioned at an upper end of the tank, the upper portion of the float member being coaxially engaged with the shaft; a fluid impermeable, non-magnetic wall disposed between the upper portion of the float member and the shaft; and a liquid level indication magnet positioned to couple with the float magnet across the fluid impermeable wall for axial positioning of the shaft corresponding to axial positioning of the float member; the shaft being configured to transmit an axial force to a biasing member to indicate the tank liquid level by its axial positioning.