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US 10,865,536 B1Granted
Scissors gate valve and system water management system
OwnerKeith D. Olsoninventor
Life of this patent
Estimating the term…
Abstract
A gate valve for use in controlling the level of a dam has a first plate with an aperture on an upstream face of the dam and a movable plate on the upstream side of the fixed plate, with apertures sized and dimensioned to operate as a scissors when the movable plate is urged in a linear motion parallel to fixed plate. One or more edges of the apertures in the plates are provided with a sharp edge or a serrate edge oriented to sever obstructing object present in the apertures when the valve is transitioning from an open position to a closed position.
Claims15
A valve structure, comprising:
- a fixed plate having a first aperture therein adapted to be mounted to an upstream face of a water-retaining structure with the aperture locatable so as to oppose a second aperture in the water-retaining structure;
- a movable plate slidably captivated to the fixed plate and having a third aperture therein, a face of the moveable plate positioned so as to oppose a face of the fixed plate;
- an actuator coupled to the movable plate urging the movable plate so that a position of the third aperture with respect to the first aperture is controllable between an open position where the third aperture does not obstruct the first aperture and a position where the movable plate completely obstructs the first aperture, and,
- wherein the face of the movable plate is urged against the face of the fixed plate by a head of water acting on another face of the movable plate;
- and one of the first aperture or the third aperture is substantially rectangular in shape and with an axial ratio greater than or equal to 3:1.
2 more elements
A method of controlling flow from a dam, comprising:
- providing a first aperture extending though the dam from an upstream face to a downstream face;
- providing a fixed plate on the upstream face of the dam covering the first aperture and having a second aperture therein;
- providing a movable plate on the upstream side of the fixed plate having a third aperture therein, sized and oriented with respect to the second aperture to progressively obscure the second aperture when the movable plate is moved in a linear motion;
- providing a sharp edge on one of the second aperture or the third aperture, having an orientation making an acute angle with respect to an edge of another of the second aperture or the third aperture, configured to act as a scissors;
- moving the movable plate with respect to the fixed plate to open or close a path for a liquid between the upstream face and the downstream face of the dam.
2 more elements
Dependencies are inferred from the claim text.