×

Tank-contents level measuring assembly

  • US 5,594,449 A
  • Filed: 06/20/1995
  • Issued: 01/14/1997
  • Est. Priority Date: 10/26/1993
  • Status: Expired due to Term
First Claim
Patent Images

1. A tank-contents level measuring assembly comprising a horn antenna which transmits short electromagnetic waves through an opening in the tank toward the surface of contents of the tank, which electromagnetic waves are reflected at the surface and received by the same horn antenna, characterized by the following features:

  • a) The level measuring assembly, including the horn antenna (1), is disposed outside an interior (3) of the tank at a tank wall (2) substantially along an axis of symmetry of the opening (4);

    b) the opening (4) is closed with a plate (5);

    c) a damping layer (9) is interposed between a microwave coupling element (18) of the level measuring assembly and a surface of the plate (5); and

    d) the damping layer (9) occupies such a position between the microwave coupling element (18) and the plate (5) that each radiated or reflected electromagnetic wave passing through the damping layer is attenuated.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×