Abstract:
A hood that mounts around an outlet of a catch basin with a cover having a proximal end and distal end; the proximal end being pivotally attached to the hood. The cover pivots between a closed sealed position that substantially prevents water born contaminants from passing through the access opening and an open position that allows access to the access opening. The cover is made from a flexible material to allow the cover to be lifted from the closed sealed position in a substantially vertical path that allows access to the outlet of a catch basin.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application claims the benefit under 35 U.S.C. §119(e) of U.S. Provisional Patent Application Ser. No. 61/346,745 filed on May 20, 2010. 
    
    
     FIELD OF THE INVENTION 
     The present invention relates to the field of wastewater management. More particularly, the present invention relates to a low cost and effective hood for controlling and reducing the flow of pollutants and solids into an outlet of a catch basin that allows a person to easily install the hood and more easily remove any obstacles that may be trapped by the hood during maintenance of the catch basin and the outlet. 
     BACKGROUND OF THE INVENTION 
     Stormwater runoff is characterized by the United States Environmental Protection Agency as one of the greatest remaining sources of water pollution in America. Thus, efforts to implement stormwater quality improvement regulations are accelerating across the United States, compelling municipalities and land developers to maximize the usefulness and effectiveness of stormwater infrastructure as never before. 
     In urban, suburban, and commercial settings, polluted stormwater, also referred to as wastewater, is often collected in a catch basin, also referred to as a wastewater basin. In its simplest form, a catch basin functions to intercept surface water flows in order to prevent the accumulation of stormwater in an area where flooding could impede traffic or pedestrians, cause property damage, or otherwise present a nuisance. Stormwater collects in the catch basins, and flows through a network of pipes, sewers, and additional catch basins to an outlet point such as a lake, stream, river, ocean, unpopulated area, or similar location where the wastewater may be dispersed without the threat of flood or property damage. However, catch basins are also often the entry point of pollutants from diffuse sources found in stormwater runoff. For example stormwater runoff may contain pollutants such as hydrocarbons (also referred to as “oil”), bacteria, sediment, trash, organic material such as leaves, grass clippings, particulate, soil, detergents, coolants, grease, fertilizer, paint, and feces. As a result, polluted wastewater is often discharged, untreated, directly into lakes, streams, and oceans. 
     Prior art hoods include cast iron hoods sealably mounted to the walls of catch basins. These systems are based on the principle of differential specific gravity separation. The liquid mixture, which usually is wastewater, flows slowly through an elongated path in a liquid-retaining structure, such as, for example, a catch basin. The matter to be collected is usually oil and floatable debris and other types of surface debris which accumulate on the surface of the wastewater because they have a specific gravity lower than that of water. Alternatively, as the wastewater flows through the catch basin solids carried by the wastewater accumulate on the bottom of the basin. These solids sink to the bottom of the catch basin because they have a specific gravity greater than water. The problem with these catch basins is that debris and trash may collect inside of the outlet pipe and in the interior of the hood. To remove any debris, or to perform maintenance on the outlet pipe, the hood has to be completely removed, unsealing the hood from the wall, to gain access to the interior of the hood and the outlet pipe. 
     To overcome this problem, and to gain access to the interior of the hood and the outlet pipe, a cast iron hatch was hingedly attached to the wall of the catch basin. The hood could be lifted up to allow access to the interior of the hood. These hoods had many disadvantages. First, the hoods were not sealably mounted to the wall of the catch basin, allowing a significant amount of debris to flow beyond the hood. Second, the hoods were very heavy to lift up as they had to be made of cast iron. 
     To overcome the problems with previous hoods, hoods composed of a material other than cast iron were designed with a port hole-like opening at the top. In reference to  FIG. 1 , a known outlet hood  10  with this design is shown. The hood  10  is installed to the wall  20  of a catch basin over an outlet pipe  30  in the wall  20  of the catch basin. The outlet pipe  30  is shown with hidden lines and its distal end appears to protrude slightly from the wall  20  of the catch basin. 
     The hood  10  further includes a porthole  40  to allow access to the interior of the hood. A maintenance worker must climb down into the catch basin and open the porthole by manually unscrewing a cover, revealing an opening into the hood  10 . The maintenance worker then, either manually or with a suction mechanism, can remove any debris that may have collected inside of the hood or perform maintenance and service on the outlet pipe. 
     A disadvantage of this hood is that a maintenance worker needs to enter the catch basin in order to remove the cover of the porthole and remove any debris that may have entered the hood. This requires the maintenance worker to wear protective gear to protect the worker from the water-born toxins and other pollutants in the catch basin. Having to wear protective gear, and the need to enter the catch basin, increases the amount of time needed to access the inside of the hood, which adds a significant amount of time to perform maintenance or service on multiple catch basins. Additionally, having to enter the catch basin exposes the maintenance worker to harmful gases, material, and debris. This can affect the health of the worker, and increase the health care costs associated with this profession. 
     Another disadvantage is the hood requires a mechanical mechanism to seal the porthole. Mechanisms such as threads and cam-locks, which are used in this type of hood, are more susceptible to failure in that they may be difficult to open and close even if the person is in the catch basin. In order to have an effective seal to prevent surface debris, such as oil, from passing through the port hole, the prior art covers needed screwed thread connections that need manual tightening to be effective. This requires substantial time and effort by the maintenance worker. Water, sediment, and harsh materials may impact the performance of a traditional mechanism used to seal the porthole, which may prevent access the porthole as the cover may be stuck. 
     Another disadvantage of this hood is that it can only be installed in catch basins with enough room for a maintenance worker to enter the catch basin. The catch basin must be sufficiently large for the hood plus a maintenance worker, and requires enough height clearance for the cover of the porthole to be completely removed. The confined space entry in these smaller catch basins can create dangerous conditions for maintenance workers who need to enter the basin to perform maintenance activity. These catch basins cannot be installed in small catch basins, such as basins sized at 18 inches. 
     What is desired therefore is an apparatus for reducing the flow of pollutants such as hydrocarbons, sediment, soil, trash, and floatables into the outlet of a catch basin. Another desire is for an apparatus that does not require a person to enter the catch basin in order to clean out any debris that may have entered the hood or access the opening. Another desire of this apparatus is to limit the number of components to prevent the failure of the apparatus. Another desire is an apparatus that is modular to allow the hood to be easily installed in catch basins that may only have a small opening in the ground from which water flows into. Another desire is an apparatus that can be used in small catch basins that are not large enough for a person to enter. It is also desirable to have a partially liftable and flexible hatch that would permit access to the outlet pipe to perform things such as pipeline surveillance and root scouring. 
     SUMMARY OF THE INVENTION 
     The invention is directed to a hood covering in a catch basin having an easy access hatch. The easy access hatch allows easy access to the interior of the hood without requiring the maintenance worker to don protective gear or enter the confined area of a catch basin. 
     These and other objects of the present invention are achieved by provision of an apparatus for mounting around an outlet of a catch basin comprising a hood having an upper portion and a lower portion, the upper portion of the hood having an access port or opening. The cover has a proximal end and distal end, the proximal end is pivotally attached to the upper portion of the hood and the cover is pivotal between a closed substantially sealed position that prevents surface debris and other water-born contaminants from passing through the access opening and an open position that allows access to the access opening. The cover is made of a flexible material to allow the distal end of the cover to be lifted from the closed sealed position in a substantially vertical path by a substantially vertically lifting force. Typically this can be done using a pole or handle extended down into a catch basin to pull up on the hood. 
     In some embodiments, a handles extends from the cover. In some embodiments, the cover is substantially an elastomer material. In some embodiments, the cover, in a closed position, creates a sealing area around the access port where the cover is in contact with the hood around the periphery of the access port. In some embodiments, the upper portion of the hood is substantially flat. In some embodiments, the cover is in a substantially parallel plane with the upper portion. In some embodiments, the access port has a downwardly facing molding around its perimeter. 
     In another embodiment of the present invention is an apparatus for mounting around an outlet of a catch basin comprising a hood adapted to be partially sealingly fitted around the outlet of a wall of the catch basin so as to define at least a partially sealable compartment therewith that is open to the outlet and extends below the outlet. A hatch made from an elastomeric material is attached at a first end to a top portion of the hood and covers an access opening in the top portion, the hatch releasably seals the access opening in the top portion. A handle with a hook is attached to a second end of the hatch, the second end being opposite the first end. 
     In some embodiments, the hood comprises two pieces that are sealed together during installation of the hood. In some embodiments, in a closed position, the hood and the hatch are sealingly fitted together. In some embodiments, the hatch is weighted and releasably seals the access opening using the weight of the hatch. In some embodiments, the hatch is substantially triangularly shaped. In some embodiments, the second end is an apex of the triangle. 
     In another embodiment of the present invention is an apparatus for mounting around an outlet of a catch basin comprising a hood having a top portion and a bottom portion, the hood adapted to be partially sealingly fitted around the outlet of a wall of the catch basin so as to define at least a partially sealable compartment therewith that is open to the outlet and extends below the outlet and an elastomeric hatch attached to the top portion of the hood. 
     In some embodiments, the hatch is weighted and releasably seals an access opening in the top portion using the weight of the hatch. In some embodiments, the hatch has a weighted handle. In some embodiments, the hood comprises a bottom portion having a first flange and a top portion having a second flange adapted to be sealingly fitted with the first flange. In some embodiments, the bottom portion is sealed to the top portion using a gasket. In some embodiments, an adhesive is applied to the gasket. 
     In another embodiment of the present invention is an apparatus for mounting around an outlet of a catch basin comprising a hood wall adapted to be partially sealingly fitted around the outlet of a wall of the catch basin so as to define at least a partially sealable compartment therewith that is open to the outlet and extends below the outlet. The hood wall comprises a bottom portion having a first flange and a top portion having a second flange adapted to be sealingly fitted with the first flange. A substantially triangularly shaped weighted hatch made from an elastomeric material is attached to the top portion and covers an access port in the top portion. The weighted hatch releasably seals the access port. 
     In some embodiments, a weighted handle extends from the hatch and has a hook. In some embodiments, the top portion of the hood is substantially flat. In some embodiments, the hatch is in a substantially parallel plane with the access port. In some embodiments, the access opening has a downwardly facing molding around its perimeter. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of a catch basin wall, wherein a known hood design having a front wall in the horizontal plane with a constant radius having a circular access point sealed with a screwed cover. 
         FIG. 2  is a side view of a hood according to one embodiment of the present invention. 
         FIG. 3  is a perspective view of the hood shown in  FIG. 2 . 
         FIG. 4  is a front view of the hood shown in  FIG. 3 . 
         FIG. 5  is a side view of the hood shown in  FIG. 2 . 
         FIG. 6  is a top view of the hood shown in  FIG. 2 . 
         FIG. 7  is a side view of a hood according to another embodiment of the present invention. 
         FIG. 8  is an exploded side view of a hood according to  FIG. 7 . 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The exemplary embodiments of the present invention may be further understood with reference to the following description and the related appended drawings, wherein like elements are provided with the same reference numerals. The exemplary embodiments of the present invention are related to an apparatus for controlling and reducing the flow of pollutants and solids into an outlet of a catch basin that allows a person to easily install the device and remove any debris within the hood during maintenance. Specifically, the apparatus uses a hood sealably attached to the wall of a catch basin, and a novel hatch or cover system, allow easy access to the access port in the hood. 
     As best seen in  FIG. 2 , a vertical cross section of the circular catch basin  200  is shown. In this catch basin  200 , the first inlet pipe  205  enters catch basin  200  at the same vertical level as the outlet pipe  210 . In some embodiments the first inlet pipe  205  may be above the outlet pipe  210  thereby preventing wastewater from backing up in the inlet pipe  205 . The prow  215  extends toward the middle of the catch basin in the horizontal plane. In some embodiments the prow extends to a center point of the catch basin in a cross section plane defined by the static waterline. This provides sufficient room inside the hood compartment to allow the hood to accommodate different size outlets, while also providing sufficient room outside the hood compartment for pollutants to collect on the surface of the wastewater. 
     As best seen in  FIGS. 3-6 , perspective, front, and side views of the hood from  FIG. 2  are shown. Hood wall  240  comprises a left side  345  and right side  350 . A flange  325  extends along a least a portion of the perimeter of the left side  345  and right side  350 . The flange  325  provides a surface to sealably mount the hood  295  to the wall of the catch basin  200 . The flange  325  may include one or more holes  310  for sealably mounting the hood  295  to the wall. It should be understood that any system may be used to sealably mount the hood  295  to the wall of a catch basin  200 . For example, cement, sealant, external fixtures, or bolts may be used to sealably mount the hood  295  to the wall of the catch basin  200 . 
     Hood wall  240  may form a prow  215  in the horizontal plane defined by the static water level  230  ( FIG. 2 ) in the catch basin  200 . Again, the static water level  230  is the lowest point of the outlet pipe. In other words, the hood wall  240  forms a wedge in the horizontal plane, when the hood  295  is mounted to the wall. In some embodiments the prow  215  extends along a vertical axis. The prow  215  extends between the hood wall bottom  225  and a hood wall top  220 . In the disclosed embodiment the bottom of the prow  215  is below the static water level  230 , and the top of the prow  215  is above the static waterline  230 . In the embodiment shown the bottom of the prow  215  extends to the bottom  225  of the hood wall  240 , and the top of the prow  215  extends to the top  220  of the hood wall  240 . 
     In a preferred embodiment, the top of hood  295  is substantially flat. A substantially flat top portion, including the access port. Because the access port and upper portion of the hood is flat it allows for a superior seal in conjunction with the hatch design which creates a sealing surface area adjacent to the perimeter of the access port. 
     Hood  295  has an access opening or port  290  that allows access into the interior of hood  295 . Through access opening  290  a maintenance worker can perform maintenance and service on the outlet pipe, or remove any debris that may have collected inside of hood  295  or in the outlet pipe. Hood  295  has a hatch or cover  340 . Hatch  340  is preferably shaped similar to the shape of the top of hood  295 . For example, if the top of the hood  295  is triangular in shape, hatch  295  would also be triangular in shape. It should be noted, that the shape of hatch  340  does not need to be the same shape as the top of hood  295 . Hatch  340  includes a cover portion  405  and a handle  410 . Cover portion  405  is preferably sized larger than access opening  290  being covered by hatch  340  to increase the durability of the seal created by the hatch. Having a cover portion sized larger than the access opening  290  allows water that falls on hatch  340  to be deflected into the catch basin and helps prevent any leakage in the access opening  290  of hood  295 . In a preferred embodiment, the cover extends beyond the access opening  290  by at least 1 inch. 
     Access opening  290  can be of any size depending on the size of hood  295  and size of catch basin  200 . Access opening  290  preferably has a downwardly facing molding around it to increase the support in the top of hood  295 . This additional support of the molding reduces the overall number of components necessary to bear the weight of hatch  340 . 
     Hatch  340  is pivotally secured directly to hood  295  at a top portion and extends over access opening  290 . Hatch  340  may include a hinge or other mechanical connection with rotational abilities, however, it is preferable that a hatch  340  is connected directly to hood  295 , without any intermediate mechanical means, and hatch  340  allows access to the interior of hood  295  by bending in an upward direction. As shown in one embodiment in  FIG. 4 , the hatch is fastened to the hood with fasteners  415 . In a preferred embodiment (As shown in  FIG. 5 ), hatch  340  is capable is bending in an upward direction with a decreasing radius, allowing access to the interior of hood  295  without having to completely open hatch  340 . In contrast, when opening a rigid hatch the outer edge would be required to follow a constant radius the length of the hatch, and would require a catch basin with a larger height and width to open sufficiently to gain access to the interior of the hood. 
     Preferably, Hatch  340  is made from an elastomeric material such as rubber. An elastomeric material, such as rubber, allows hatch  340  to be bent upward to allow access to the interior of hood  295  while still maintaining it shape when in a resting position. Hatch  340  is of a sufficiently heavy material to sit flat against the top surface of the upper hood in the closed position. The weight of hatch  340 , in addition to the weight of handle  410  (as described below) creates a seal between hatch  340  and hood  295 . It is preferable that the seal is watertight, however, a watertight seal is not necessary and any seal that protects against oil, contaminates, and other debris, may be sufficient. In a preferred embodiment, hatch  340  is flat, and is planar or in a substantially parallel plane with the top of hood  295 . A flat hatch allows for a better seal against the top of hood  295 . As shown in the embodiment of  FIG. 2 , the hatch (or cover), when in a closed position, lies in a plane parallel to the flat surface of the upper hood. 
     Hatch  340  has a handle  410  sized particularly large to generate a larger force around the connection between hatch  340  and hood  295  without requiring great strength to open hatch  340 . Handle  410  may also have a hook to allow an extension device, such as a grab hook or a boat hook, to be inserted into the catch basin, grabbing the hook of handle  410 , and lifting hatch  340 . This negates the need for a person to reach into the catch basin to open hatch  340 . Handle  410  is preferably made from a weighted material, such as 10 gauge steel. The weight of handle  410  creates a superior seal as a large amount of weight is placed at the tip of hatch  340 . This generates a large downward force on hood  295  by hatch  340 , enhancing the seal between hatch  340  and hood  295  in the sealing area. Hood  295  is not limited to hoods with an extending hook or handle, but would include hatches that incorporate lifting elements into the hatch that would permit a grab hook to grab onto to lift the hatch. 
     In another embodiment, hatch  340  may have a plurality of magnets embedded around the perimeter of the hatch. Hood  295  may have magnets on the top of the hood, corresponding to the magnets in hatch  340 . The addition of magnets creates an additional sealing force between hatch  340  and hood  295  without requiring any additional mechanical components. This increases the effectiveness of the seal without decreasing the durability of hatch  340 . 
     To gain access to hatch  340 , a maintenance worker reaches down into catch basin  200  and grabs handle  410 , or a device is inserted into the catch basin to grab the hook. The maintenance worker lifts up handle  410 , which can be lifted in a substantially vertical direction, revealing access opening  290  in hood  295 . In contrast, a rigid hatch structure would require the maintenance worker to lift the hatch following the fixed radius path followed by the outer edge of the rigid hatch. This makes a rigid hatch more difficult to open, and requires more space. This can be problematic especially in smaller catch basins. Once the hatch is lifted, the maintenance worker can then remove any debris that may be inside of hood  295  either by hand or using a vacuum. The invention also allows for partial lifting of the hatch too. The new design of hatch  340 , compared to  FIG. 1 , allows access to the interior of hatch  295  without requiring a person to don protective gear and enter catch basin  200 . This saves a significant amount of time in the cleaning of each catch basin and also significantly reduces any health risks associated with the cleaning of catch basins as a person is no longer directly exposed to the waste in the catch basin. 
     In the exemplary embodiments, hatch  340  is shown to be triangular in shape, shaped similar to hood  295 . However, hood  295  need not be shaped triangularly with a prow as a point. Hood  295  may be rounded in shape, or of any other shape that may facilitate the protection of stormwater in a catch basin. Hatch  340  may be redesigned to be shaped similar to hood  295 . And may be rounded or of any other known type of shape. 
     As best seen in  FIGS. 7 and 8 , side views of a second embodiment of hood  295  are shown. Hood  295  has a top portion  330  and a bottom portion  335 . Hood  295  may be of a unibody construction ( FIGS. 2-5 ), being made from a single piece of plastic, metal, or any other known material. In another embodiment, hood  295  may be modular. Hood  295  may be composed of two separate pieces, top portion  330  and bottom portion  335 . Top portion  330  and bottom portion  335  may be constructed separately but designed to sealingly fit together such that no water can penetrate the side of hood  295 . Top portion  330  and bottom portion  335  may be sealed together using a gasket to provide a water tight seal, and an adhesive that adheres top portion  330  to bottom portion  335 . Top portion  330  may not be adhered directly to bottom portion  335 ; and only a gasket may be used. Top portion  330  and bottom portion  335  may be separately sealed to the wall of the catch basin. Each portion may have a flange with a gasket that allows for an overlapping portion between top portion  330  and bottom portion  335 . The sealing of both portions to the wall creates a sealing force in the gasket, creating a water tight seal. The bottom of top portion  330  may be sized slightly larger than the top of bottom portion  335 . This allows top portion  330  to fit around bottom portion  335  to create the seal. In a further embodiment, the top of bottom portion  335  may be sized slightly larger than the bottom of top portion  330  to create the seal. 
     This apparatus has the advantage in that it can be installed in many locations due to its modularity. The apparatus is small and can be installed in catch basins as small as 18 inches, or catch basins that are traditionally difficult for a person to enter. The apparatus doesn&#39;t require a hinge or a traditional mechanism to allow access to the interior of the hood; this increases the lifespan of the hood and prevents many defects. Additionally, the hatch does not need to be opened all of the way to allow access to the interior. This limits the necessary clearance in height required to open a traditional hood. 
     The apparatus also protects a person from having to enter the catch basin in order to remove any debris that may have entered the outlet pipe, to inspect the outlet pipe, or to perform maintenance on the outlet pipe or the interior of the hood. This protects the person from potential diseases, contaminants, or sharp or hard objects that may be lurking inside of the murky water of the catch basin. This provides a large cost savings as specialty protection gear is not required, health care costs can be reduced as the person cleaning the catch basin does not need to be exposed to the contaminated water, and the amount of time necessary to clean each catch basin is reduced. 
     It would be appreciated by those skilled in the art that various changes and modification can be made to the illustrated embodiment without departing from the spirit of the invention. All such modification and changes are intended to be covered hereby.