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 Silt filtration system

Details
Inventors: Lewis, Randy;
Assignee: Erosion Control Services, Inc. (Charlotte, NC)
Primary Examiner: Simmons; David A.
Assistant Examiner: Lawrence; Frank M.
Attorney, Agent or Firm: Kennesy Covington Lobdell & Hickman, LLP

A silt filtration system for use with storm water catch basins of the type which include a fixed frame with a drain opening at the top of the catch basin and a grate covering the drain opening and includes a base frame having a pair of end rails and a pair of side rails adapted to fit within the fixed frame at the top of the catch basin. The silt filtration system also includes a pair of lengthwise support bars or rods which are removably positioned within the base frame and a pair of transverse support bars or rods which are removably positioned over the lengthwise support bars and supported by the side rails. The lengthwise and transverse bars suspend a filter bag within the catch basin which includes a pocket at the top end for receiving the lengthwise support bars and the transverse support bars. The silt filtration system may include a deflector for deflecting silt and/or sediment and the like over the grate and into the filter bag. A method for installing the silt filtration system includes the steps of: lifting the grate from the drain and placing the base frame on the fixed frame of the catch basin, inserting the lengthwise support bars through the pockets of one pair of opposite sides at the top end of the filter bag and dropping the filter bag into the catch basin with the lengthwise bars positioned in the holders to support the sides of the bag. Further steps include: inserting the transverse support bars into the pockets of the remaining opposite sides at the top end of the filter bag, replacing the grate on top of the silt filtration system and installing the deflector on the grate.

DETAILED DESCRIPTION In accordance with the present invention, a silt filtration system is provided for use with storm water catch basins for filtering silt from wastewater flowing into street curb drains.
The silt filtration system is designed to be used with a street curb drains of the type which include a storm water catch basin having a fixed frame with a drain opening at the top of the catch basin and a grate covering the drain opening.
The silt filtration system is uniquely configured to allow for the quick and easy removal of the silt captured by the system.
Because the silt filtration system of the present invention is specifically designed to fit beneath the grate, it is located entirely beneath the street level and is not exposed to vehicular traffic or the elements.
Thus, the system may be used repeatedly and moved to different locations as needed, such as, by way of example, to new phases of a construction project.
The silt filtration system of the present invention comprises a base frame adapted to fit within the fixed frame at the top of the catch basin of the curb drain.
The base frame includes a pair of spaced apart end rails which are mounted beneath the grate and rest on a series of bumps or ridges located on the fixed frame of the catch basin on which the grate covering, normally rests.
The end rails are connected by a pair of spaced apart side rails which extend between the end rails to form the base frame.
The silt filtration system also includes a pair of lengthwise support bars or rods which are removably positioned within the base frame and supported by a plurality of holders or brackets attached to the base frame.
Each holder includes a recess for receiving and supporting the lengthwise bars therein.
In addition, the system includes a pair of transverse support bars or rods which are removably positioned over the lengthwise support bars and supported by the side rails.
The lengthwise and transverse bars of the present invention are designed to suspend a filter bag within the catch basin for capturing the silt in the water flowing into the catch basin



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