Patent ID: 8181518
Filing Date: 2012-05-22
Classification: G01F

Abstract:
1. A magnetic float for a level indicator system, said float comprising a hollow tube comprising a carbon fiber reinforced cured resin matrix, said tube having a first end and a second end and a longitudinal axis extending between the ends, a polymeric first domed endcap sealing the first end of the hollow tube, a polymeric second domed endcap sealing the second end of the hollow tube, the inside of said float being hermetically sealed from the outside by the domed endcaps, at least one polymeric reinforcing ring mounted inside of a midsection of the hollow tube between the first end and the second end to resist radial inward collapse of the tube, and a magnet assembly mounted in the tube near the first end cap, said magnet assembly comprising a plurality of longitudinally elongated magnets positioned adjacent the inside wall of the hollow tube near the first end of the hollow tube, each magnet having a longitudinal axis positioned parallel to the longitudinal axis of the hollow tube and being circumferentially spaced apart from the other magnets of the plurality, said float having an apparent density of less than 0.5 with respect to water.