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Low profile overbalanced backwater valve

  • US 9,903,106 B2
  • Filed: 10/21/2014
  • Issued: 02/27/2018
  • Est. Priority Date: 10/21/2013
  • Status: Active Grant
First Claim
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1. A backwater valve, comprising:

  • a hollow valve body having an inlet defined by a vertical surface, an outlet, and a bottom;

    a pivoting valve member pivotally movable about a pivot axis that is positioned below the inlet between a normally open position along the bottom of the valve body and a closed, vertical position sealing the inlet, the pivoting valve member having a peripheral edge comprising a hinge end, a remote end, and opposed sides, the pivot axis being positioned at the hinge end, the pivoting valve member carrying a float; and

    an overbalancing member carried by the pivoting valve member that biases the pivoting valve member toward the closed position, the overbalancing member comprising at least one of a counterweight and a magnetic element, the overbalancing member being positioned at the hinge end and spaced from the pivot axis such that the overbalancing member is vertically aligned with and above the pivot axis when the pivoting valve member is in the open position and horizontally aligned with and over from the pivot axis when the pivoting valve member is in the closed position, wherein, in each of the open and closed positions the pivoting valve member extends from the pivot axis along a first axis and the overbalancing member extends from the pivot axis along a second axis, the second axis being perpendicular to the first axis and intersecting the first axis at the pivot axis.

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