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 control linkage movable about the pivot axis and positioned opposite the valve member relative to the pivot axis; and
a float and a counterweight connected to the valve member via the control linkage, at least the float being disengageable from the valve member to change an operation of the valve member from a normally open position above the inlet, in which, in response to a flow of water from the outlet toward the inlet, the valve member moves toward the closed position, to a normally closed position covering the inlet, in which, in response to a flow of water from the inlet toward the outlet, the valve member moves toward the open position, and wherein, in the normally closed position, at least the float is disengaged.
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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
9 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 control linkage movable about the pivot axis and positioned opposite the valve member relative to the pivot axis; and a float and a counterweight connected to the valve member via the control linkage, at least the float being disengageable from the valve member to change an operation of the valve member from a normally open position above the inlet, in which, in response to a flow of water from the outlet toward the inlet, the valve member moves toward the closed position, to a normally closed position covering the inlet, in which, in response to a flow of water from the inlet toward the outlet, the valve member moves toward the open position, and wherein, in the normally closed position, at least the float is disengaged. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification