STORM WATER FILTER WITH DEBRIS SWEEP

FILTRE A EAUX D'ORAGE AVEC BALAYAGE DES DEBRIS

English Abstract

A unit cartridge with a support ring gasket, and upper debris sweep, and
debris retention
bin is presented for use in filtering storm water runoff. Unlike some other
configurations
of cartridges, which rest the bottom of the cartridge on a support grate and
ring, the
present configuration rests on a support ring formed or built to the top of
the cartridge. A
debris bin is formed above and as part of the unit cartridges to capture
sediment which
would otherwise lie on top of the cartridges or filter baskets to prevent or
impede
removal. At the top of the cartridge is a debris sweep to remove adhering
debris to allow
easier installation and removal of the cartridge. Below the support ring may
be formed or
placed a gasket to prevent further debris or water bypass when the cartridge
is seated. The
cartridge is adapted to existing or new storm water or water infiltration
wells which have
been adapted to receive and support the cartridge filter. The cartridge can be
fit into
conventional storm water infiltration wells that are pre adapted to receive
filters.

Claims

Claims
1. A cartridge with a sweep to prevent sediment from getting between a filter
cartridge
body and a water charging or recharge the well . The sweep is of flexible
material and is
glued or mechanically fastened to the top of the cartridge.
2. A cartridge with a sediment chamber as a component on above filters, or
being built as
an integral part of a filter cartridge. The upper portion of the chamber is
adapted to
receive cables and connectors which extend to the surface, and the bottom part
is adapted
to receive connectors to the cartridge filters below.
3. A cartridge with a gasket to provide even seating and further protection
against bypass
of water which has not been filtered.
4. A filter support fabric below the filter media.
5. A filter support grate being part of the cartridge to support the filter
support fabric.
6. A cable fastened to the body of the cartridge to allow deep installation
and to allow
secure fastening at the surface.

Description

CA 02535774 2006-01-31
REFERENCE TO A "SEQUENCE LISTING," A TABLE, OR A COMPUTER
PROGRAM LISTING APPENDIX SUBMITTED ON A COMPACT DISK
Not applicable
TECHNICAL FIELD This invention relates to a cartridge filter with sweep used
in storm and other water
infiltration wells.
BACKGROUND OF THE INVENTION
In storm water diversion into recharge wells, filters are used to remove finer
sediments
and dissolved components of the water stream. The finer sediments are trapped
in and on
top of the filters. Experience shows the sediment layer can be substantial so
that the
sediment can form a friction layer against removal of the filters. The
cartridge filter
herein uses a sweep to reduce sediment, a debris or sediment capture barrel,
and a gasket
on a cable removable filter.
DISCLOSURE OF INVENTION
I have come to the realization that sediment can lead to maintenance issues by
impeding
removal of the filters below, and by falling into the well below the filters
on removal
could result in contaminated sediments being spilled into the bottom of the
recharge well.
be a major impact on recharge wells, including filtered recharge wells. Many
recharge
wells without sweeps and debris barrels or debris removal mechanisms have to
be
redrilled periodically. Filtered wells need more frequent maintenance because
of debris or
sediment. A structure is provided herein for sweeping the sidewalls of the
receiving well
of debris, for providing a gasketed fitting to an existing or new receiving
ring, and for
capturing debris in a chamber above the media filters but not in the baxrel of
the well
above the filters. Once through the cartridge, the water is directly
discharged into a
recharge well or into further filtered recharge well.
A cartridge is disclosed herein which has a sweep to clean the wall of debris
and
sediment which would otherwise bind the cartridge by friction into the well
wall. Further
a gasket is disclosed to further prevent bypass and to provide more even
seating of the
cartridge. A cartridge is disclosed herein where there is a sediment or debris
chamber
above the filter media. A cartridge is disclosed herein where there are filter
media below
the debris chamber. A cartridge is disclosed herein where a filter separation
layer rests on
an integral (formed or mechanically fastened) grate being the bottom part of
the cartridge.

CA 02535774 2006-01-31
Description
CROSS-REFERENCES TO RELATED APPLICATIONS
Aquifer recharge techologies are becoming more common and more accepted and
included unfiltered wells, unfiltered horizontal drains, vegetative strips,
and infiltration
ponds and galleries. A problem with these technologies is the accumulation of
debris and
sediment in the body of unfiltered wells, plugging of the formation around the
well, or
the plugging of upper surfaces of the soils by debris.
Further, there are sediment traps such as ponds which require large tracts of
lands,
horizontal pipes without filters, centrifugal sediment trapping technologies
which fit in
series with systems for recharge, and catchbasin inserts.
The structure disclosed herein can be used instead of or as an add on
technology. For
example when used instead of a sediment pond, a builder can use the land
formerly set
aside for ponds to build green space, more houses, and to protect the public
from debris
and flows.
STATEMENT AS TO RIGHTS TO fNVENTIONS MADE UNDER
BRIEF DESCRIPTION OF THE DRAWINGS

CA 02535774 2006-01-31
FIG. 1 is profile view of the cartridge filter.
FIG. 2 is a profile view of the cartridge filter in a new or existing adapted
infiltration
well.
FIG. 3 is plan view of top of the textile based debris trap.
DETAILED DESCRIPTION OF THE INVENTION
Referring to FIG. 1, a cartridge for storm water is illustrated. The body of
the cartridge is
a pipe (1) of known strength and radius. The pipe (1) has an upper support
ring (3)
fastened to the top of the pipe by a glue or screws(2) or is made integral
with the
cartridge body (1). A cable (15) with connectors (16) is used to install and
remove the
cartridge. A sweep (14) is fastened to the top of the support ring (3). A
gasket (13) is
below the support ring (3). A series of eye bolts (12) with nuts (11) through
holes (4) in
the wall of the pipe (1) are used to fasten the support cables (15). At the
bottom of the
cartridge is a support grate 6), on which rests a filter fabric (5) designed
to retain the fines
of the filter media (7). Above the filter media (7) are other media layers
(8,9) (of which
two are shown. Above the media is a sediment or debris chamber (21). A
sediment or
debris catcher not shown herein may also be present.
Referring to Figure 2 one sees a complete cartridge (19) fit into an existing
storm or other
water recharge well (17). A support ring (18) is adapted to support the
cartridge (19). The
well may be slotted (20) and or open at the bottom.
Referring to FIG.3 one sees the a plan view. The sweep (14) is visible. Below
the sweep
(14) is shown the cartridge body (1). The eye bolt holes (4) are shown in the
body of the
cartridge (1). The top filter media (9) is shown looking at it from the top.
The filter
connector screws (2) are shown. The support ring is shown (3).
The invention as shown herein
Allows for the use of a cartridge filter with a sediment chamber, a debris
sweep, a bottom
grate and filter fabric to be placed in new or old adapted stormwater or other
water
charging or recharge wells. The cartridge rests on a support ring at its top,
and has a
gasket to provide for more secure seating.
A cable with connectors is able to remove the filter. The cartridge relys on
the sweep and
gasket, and not on filter cartridge expansion, as is the case of other
filters, to prevent
bypass.
Finally, the patent device is a patentable article, useful to commerce and the
environment,
and the process is patentable with the articles, and is useful to commerce.

Representative Drawing