Patent ID: 6253611
Filing Date: 2001-07-03
Classification: G01F

Abstract:
A liquid level indicator which comprises:an upright cylindrical tube of non-magnetic material,a cylindrical, permanent first magnet element aligned with, and movable coaxially within, the tube,a float, andan annular, permanent second magnet element aligned with, and movable coaxially outside, the tube, whereinsaid first and second magnet elements have magnetic fields in alignment with one another, and whereinone of said first and second magnet elements is carried by the float while another of said first and second magnet elements is not carried by the float, and whereinsaid first and second magnet elements are axially spaced relative to one another such that said one of said first and second magnet elements carried by the float supports by magnetic attraction said another of said first and second magnet elements not carried by the float.