Combined sewer overflow and storm water diverter screen

• US 5,902,477 A
• Filed: 04/30/1997
• Issued: 05/11/1999
• Est. Priority Date: 04/30/1997
• Status: Expired due to Fees

• Current Assignee: John Vena
• Original Assignee: John Vena
• Inventors: Vena, John
• Primary Examiner(s): Lithgow, Thomas M.
• Application Number:
  US08/841,324
• Time in Patent Office: 741 Days
• Field of Search: 210/128, 210/121, 210/106, 210/154, 210/162
• US Class Current: 210/162
• CPC Class Codes: E03F 5/12 Emergency outlets
• CPC Class Codes: E03F 5/125 providing screening of overflowing water

Abstract

A diverter screen for efficiently handling solid and floatable objects in combined sewer overflows and storm water runoff systems is disclosed. The screen is formed of a mechanical bar screen, one or more regulator or overflow chambers, and a deflector plate for diverting the solids and floatables into the outgoing sewage interceptor channel. The bar screen sits on a shelf in a concrete channel, and is sized to capture solids and floatables that must be prevented from entering the rivers, lakes or oceans The bar screen uses a downward rake motion to push solids and some floatables into the outgoing interceptor, while other floatables are allowed to drain out as the regulator channel drains.

Claims

1. A diverter screen system for use in a waste water management system for directing the flow of solid and floatable objects carried by waste water, wherein said screen system comprises a waste water chamber having an inlet port for receiving waste water, a waste water treatment plant outlet port which communicates directly with said inlet port, an overflow outlet port and a diverter screen positioned in said chamber such that wastewater that rises in said chamber and flows through said upper overflow outlet chamber must first pass through the diverter screen which functions to retain solid and floatable objects of a predetermined size, said diverter screen comprising:

a plurality of spaced apart screening elements cooperating to form a filter, said filter being of a generally slanted form and having a forward lower end positioned closer to said inlet port, and a rearward upper end positioned closer to said overflow outlet port;

a movable rake arm coupled to said filter for directing said solid objects retained by said filter to said waste water outlet port, said movable rake arm being movable about said filter, wherein said floatable objects being allowed to flow to said waste water outlet port when the level of water in said chamber is below a predetermined level.

2. The diverter screen of claim 1, further including a mounting surface, wherein said filter sits on said mounting surface.

3. The diverter screen of claim 2, wherein said mounting surface is formed of a concrete channel.

4. The diverter screen of claim 3, wherein said concrete channel is formed of a size to capture said solids and said floatable objects.

5. The diverter screen of claim 4, wherein said movable rake arm is movable in a generally upward and a generally downward direction.

6. The diverter screen of claim 5, wherein said movable rake arm moves in said downward direction to push said solid objects into said concrete channel.

7. The diverter screen of claim 1, wherein said screening elements are generally bar-shape in construction.

8. The diverter screen of claim 1, further including a liquid level gage for gaging the level of liquid on which said diverter screen is to act, said liquid level gage activating the movement of said movable rake arm when the level of liquid on which said diverter screen is to act reaches a predetermined level.

9. The diverter screen of claim 8, wherein when activated said movable rake arm continues to move until the level of said liquid on which said diverter screen is to act reaches a second predetermined level.

10. The diverter screen of claim 9, wherein said liquid level gage is a float switch.