Subgrate drain basin filter

Abstract

The present invention is a filter insert inside a storm water inlet with a grate cover and including an inlet with a combination of curb inlet and grate, and holds the insert within the inlet by means of a support inserted within a sleeve that rests directly upon the basin covers' support.

1  I claim in a storm water inlet basin 
 a) with a combination of a curb inlet and a perforated cover,    b) that rests on a cover support within a storm water inlet basin,    c) with a filter basket assembly located essentially beneath said perforated cover,    d) a support means to hold said filter basket assembly in position within said inlet basin comprising a combination of support bars, a bar sleeve and a continuous bar sleeve formed in the upper peripheral edge of the filter basket assembly wherein said combination rests directly upon said cover support, and further said support bars hold a portion of said continuous bar sleeve in place essentially against the inside outer walls of said curb inlet by means of support arms, and further the support bars also hold portions of the continuous bar sleeve in place along cover supports.    
   
   
       2  Said support means of claim  20  further comprising a front and rear spreader bar that hold the right and left support bars in position upon the cover support ledges.  
   
   
       3  The support means of claim  20  further comprising a front spreader bar and a bypass bridge.  
   
   
       4  The filter basket of claim  20  further comprising a semi rigid perforated reinforcement within the filter basket that resists deformation during maintenance.  
   
   
       5  I claim in a storm water inlet basin comprising 
 a) a perforated cover that rests upon    b) a cover support within a top opening of a storm water inlet basin with    c) a basin insert located below said inlet basin's perforated cover and essentially within said inlet basin,    d) a support structure with a filter basket assembly suspended thereon wherein said support structure consists of elongated essentially rigid material inserted into one or more sleeves formed on an upper periphery portion of said filter basket wherein said ridged material stretches said sleeve along the cover support and lays the combination of said sleeves and said essentially rigid material directly upon said cover support holding the filter basket in place within said inlet basin.    
   
   
       6  The support structure of claim  24  wherein said elongated essentially rigid material is a discontinuous metal rod that bending essentially at the corners at the cover supports inside a rectangular inlet basin or bending at the cover supports in an essentially circular configuration inside a circular inlet basin.  
   
   
       7  The said discontinuous rod of claim  25  further comprising two open ends that overlap.  
   
   
       8  Said support structure of claim  25  wherein the elongated essentially rigid material is underpropped across gaps in the cover support by additional reinforcement such as but not limited to tubing or sheet metal in angle iron form  
   
   
       9  Said filter bag assembly of claim  24  further comprising a semi rigid perforated reinforcement within the filter basket that resists bag deformation.  
   
   
       10  The support structure of claim  24  comprising multiple lengths of the elongated essentially rigid material.  
   
   
       11  The elongated essentially rigid material of claim  24  comprising sheet metal.  
   
   
       12  The basin insert of claim  24  comprising one or more filter bypasses and a by pass bridge to channel storm water over the bypass opening into inside the filter basket.  
   
   
       13  The by passes of claim  32  located essentially in the corners of the inlet basin.  
   
   
       44  The bridge of claim  32  consisting of a flap extension to said sleeve of the bag assembly.