Liquid purification or separation – Structural installation – Flume stream type
Reexamination Certificate
1999-10-04
2001-04-10
Upton, Christopher (Department: 1724)
Liquid purification or separation
Structural installation
Flume stream type
C210S163000, C210S164000, C210S232000, C210S480000, C404S004000
Reexamination Certificate
active
06214216
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a drain filter support. The support of the present invention modifies the known drain filter sold under the trademark DRAIN DIAPER® so that is can be used with curb and other drains without the need to support the filter about the entire periphery of the drain cover.
2. Description of the Related Art
Sewer drain filters are taught in several prior art patents.
Boosey 2,263,259 discloses a self-cleaning sewer drain where the catch bag 15 is supported around the entire diameter of the pipe 13.
Arntyr, et al., 4,419,232 disclose a collection bag supported by hooks formed on an insert. Round and rectangular versions are shown.
Murfae, et al., 5,133,619, relates to a special construction for a storm drain.
Logue, 5,372,714 and 5,575,925 has carrying loops 34 are formed in the edges of the filter bag and lift rods 40 are inserted into the loops.
Schneider, 5,405,539 discloses the use of pneumatic cylinders 34 and 35 to support a filter structure in storm drain housing. This is best seen in FIG. 2.
Chinn, et al., 5,725,782,
FIG. 7
, attaches the bag type roll filter to a curb drain with straps 32 or hood 37.
Fanelli, 5,733,445, installs a special covering grate and filter assembly over an existing grate. The filter assembly is supported in the covering grate as shown in FIGS. 4 and 6.
Stetler, 5,744,048 requires a specially configured filter 70 so that the filter can be supported on a support element fabricated as part of a storm drain insert.
SUMMARY OF THE INVENTION
The invention is a modification to the known DRAIN DIAPER® drain filter to enable the filter to be used in drains with the need to support the filter about the entire periphery of the grate. The modification involves the formation of one or more loops on one or more edges of the filter and inserting a spring loaded rod in the loop so that the rod supports the side in the drain housing. In one embodiment of the invention, this support also creates a dam of filter material to prevent debris from entering the mouth of a curb drain.
The present invention supports a catch basin insert or filter in an open type curb inlet storm drain found on streets and in parking lots. Catch basin filters and inserts are designed to collect coarse sediments, oil, grease and debris from storm water runoff. Such filters require support on all four sides of a grate using the weight of the grate. The present invention attaches such a filter or insert inside a curb inlet storm sewer where only three sides of a grate are available for support. The invention may also be used to support the insert or filter within the drain vault without the need to support the insert using the weight of the grate.
The present invention modifies the filter by creating a reinforced pocket on one or more side length of the filter/insert. The pocket(s) accommodates a spring-loaded adjustable heavy-duty rod. The rod is placed inside the pocket and adjusted in length to fit inside the curb inlet drain and/or inside the vault. The rod is then positioned against each sidewall inside the curb drain or vault so that it is secured tightly against the sidewalls. The rod may be adjustable in length and in spring force exerted within the curb drain or the vault. The other sides of the filter without the pockets are supported by the weight of the grate.
The present invention also provides a vertical barrier or dam on the open curbside of the catch basin to prevent debris from falling behind the filter/insert into the basin.
A principal object and advantage of the invention is the provision of a drain filter for catch basins.
Another object and advantage of the invention is the provision of a curb drain filter for curbside catch basins which inhibits debris, etc. from entering the open portion of the catch basin.
A still further object of the invention is the provision of a curb drain filter that modifies an existing filter so that is can be used in curb drains.
Another object and advantage of the invention is the provision of curb drain support which is adjustable so that it can be used in curb drains of different dimensions.
A still further object and advantage of the invention is the provision of a drain filter support which does not require use of the storm drain grate.
Another object and advantage of the invention is the provision of a drain filter support which does not require use of a drain grate to hold the filter.
The foregoing, as well as further objects and advantages of the invention will become apparent to those skilled in the art from a review of the following detailed description of my invention, reference being made to the accompanying drawings.
REFERENCES:
patent: 1711674 (1929-05-01), Egan
patent: 5372714 (1994-12-01), Logue, Jr.
patent: 5397464 (1995-03-01), Hannon
patent: 5405539 (1995-04-01), Schneider
patent: 5575925 (1996-11-01), Logue, Jr.
patent: 5632888 (1997-05-01), Chinn et al.
patent: 5725782 (1998-03-01), Chinn et al.
patent: 5954952 (1999-09-01), Strawser, Sr.
patent: 6045691 (2000-04-01), McDermott
patent: 6086758 (2000-07-01), Schilling et al.
Petro-Marine Co “Drain Diaper” brochure.
Skolnik Robert M.
Upton Christopher
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