BACKWATER VALVE WITH CONTROL LINKAGE
First Claim
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1. A backwater valve, comprising:
- a hollow valve body having an inlet and an outlet;
a valve member pivotally movable about a pivot axis between an open position in which the valve member is away from the inlet and a closed position in which the valve member directly engages and covers the inlet to prevent fluid flow through the inlet, the pivot axis being disposed above the inlet;
a movable pressure member positioned in the hollow valve body having a release position above the valve member that permits the valve member to pivot freely, and a locking position immediately adjacent to the valve member in which the pressure member exerts a force upon the valve member to secure the valve member in the closed position; and
a manual external locking activator accessible from outside of the hollow valve body that moves the pressure member between the release position and the locking position.
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Abstract
A backwater valve has a valve body, and a valve member pivotally movable about a pivot axis between an open position away from the valve body and a closed position covering the valve body. A control linkage is provided with at least one of a float or a counterweight in communication with the valve member via the control linkage to modify operation of the valve member.
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Citations
16 Claims
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1. A backwater valve, comprising:
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a hollow valve body having an inlet and an outlet; a valve member pivotally movable about a pivot axis between an open position in which the valve member is away from the inlet and a closed position in which the valve member directly engages and covers the inlet to prevent fluid flow through the inlet, the pivot axis being disposed above the inlet; a movable pressure member positioned in the hollow valve body having a release position above the valve member that permits the valve member to pivot freely, and a locking position immediately adjacent to the valve member in which the pressure member exerts a force upon the valve member to secure the valve member in the closed position; and a manual external locking activator accessible from outside of the hollow valve body that moves the pressure member between the release position and the locking position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification