Title of Invention

AN EFFLUENT FILTERING DEVICE FOR A SEPTIC TANK

Abstract

An effluent filtering device for a septic tank comprising a filter housing a plurality of cylindrical hollow chambers / pipes (1, 2 and 3), characterized in that it contains a , multifunction cover (6) on top of the said conduit chambers / pipes (1, 2 and 3), another second cover (8 and 9) at the bottom end of the outer and middle said conduit chambers pipes (3 and 2), and joints (12 and 13) near the top end of the inner and outer chamber pipes.

Full Text

Field of Invention This invention related to an effluent filtering device for use in the septic tanks for filtering and removing the excreta from the water flowing outside the septic tank. Background of Invention A septic tank having an inlet to receive the excreta from the house and an outlet provided with a baffle device (having a filter) to keep solids out of the drain water is known in the art. The baffle device is provided at the outlet end of a septic tank and disposed within the tank, to reduce the percentage of solid particulate matter in the liquid that exits from the tank by way of the outlet port. The device generally reduces the percentage of the outgoing excreta by directing the same away from the outlet port and by slowing or otherwise disturbing liquid flow towards the outlet port so that the effect of gravity on the solid particles is greater than the effect of the current which would otherwise carry these out of the tank. The use of a baffle device is advisable even at the inlet port of a septic tank and within the tank so as to prevent flow of excreta across the top of the tank and to direct its flow downward and across the depth of the tank. This brings fresh microbes to the sludge at the bottom of the tank and stirs it, contributing to the fermentation of waste material in the tank. There are various types of filtering device for septic known in the art. These are disclosed in patent no: US5762792, US5690825, US5582716 and US5720875.In India also various types of septic tank filtering device is known such as Ashoka septic tank, Janta septic tank and Shankar septic tank. A baffle device disclosed in US patent no: 4832846, has a conduit and a flow director flap portion. The conduit includes, at its front, a curved wall generated on an axis running the length of the conduit. One pair each of two pairs of angled walls, extending through the length of the conduit, is attached to each side of the curved wall by a free edge of one of the pair, the other edge of the pair being attached to a wall for mounting, the wall having holes for mounting the baffle to a concrete septic tank wall, over a port in the tank wall. The angled walls are preferably perpendicular to each other and to the wall for mounting, the two walls for mounting being coplanar and at the back of the conduit. The flow director portion includes two angled walls, one is for attaching the portion to the back of the conduit, the other extends over the end of the conduit and has a surface that is further from the curved wall than it is from the paired walls when the flow director portion is attached to the conduit. The baffle is mounted vertically to the tank wall by fasteners, which are inserted through the holes that are near the top of the conduit, and into anchors, which are molded into the tank wall in a pattern for matching the holes and positioning the baffle over the port. Yet another device disclosed in U.S. Pat. No; 3,630,370 describes a biconic deflector, with its central axis concentric with the axis of the vertical pipe of the outlet opening of the septic tank. The biconic deflector is located immediately below the bottom end of the vertical pipe, which extends down into the liquid in the tank, held in place below the pipe by holding means inserted into the bottom of the pipe. Still another device disclosed in 5618445 in a septic tank comprising a planar bottom, a gas and particulate matter baffle comprising a vertical outlet pipe being open at the bottom of the pipe, a cup having a closed top, a cavity, an open bottom continuous with the cavity, and a wall of said cup enclosing the cavity and connecting the closed top to the open bottom of the cup, said open bottom of the cup having a larger area than the closed top, support means connected to said vertical pipe for supporting the bottom of the cup directly below the pipe opening with said cavity facing downward toward the planar bottom under the pipe. Another device disclosed in US patent No: 5593584,a filter unit for a septic tank including a cylindrical filter housing having two chambers therein, a first chamber having a plurality of stacked disc-dam filter units and a second chamber. Each disc- dam filtering unit is provided with an upstream side and a downstream side and the cylindrical housing has an opening in the bottom thereof in flow communication with the upstream side of the disc-dam filtering units. A vertically extending partition is provided to separate the first chamber from the second chamber and the partition includes flow through openings there through of preselected size for controlling the rate of flow from the downstream side of the disc-dam units into the second chamber. Yet another device disclosed in US Patent No: 5762790,a filtering system for filtering effluent in a septic system comprising a filter housing with sides, a top and an open bottom, a filter element holder secured within the filter housing, wherein the filter element holder contains a top and a side portion, a discharge opening in the filter housing located generally above the filter element holder for discharging filtered effluent from the filter housing, a plurality of filter elements, each secured to the filter element holder, each with a top, bottom and side, wherein the bottom of each filter element is closed to prevent flow of the effluent through the bottom of the filter element, wherein each filter element contains filtering slots for filtering solids contained in the effluent and a separation element for separating one filter element from other filter elements, which element does not significantly impede the flow of effluent through the filtering system. Still another device disclosed in US Patent No: 5683577,a filter device useful in continuous separation of solid matter from a liquid, such as liquid wastewater, where the filter includes a tubular filter element with a series of slots of selected width extending through the tubular element. The filter element has a longitudinally extending central opening with a fluid inlet therein and is received in a first tubular casing with an annular area defined between the tubular filter element and the first casing so the central opening is open to receive liquid to be filtered, liquid being filtered as the liquid flows outwardly through the slots from the central opening to the annular area. A seal is provided between the tubular element and the inside of the first casing at a location below the slots in the tubular element to prevent unfiltered wastewater from entering the annular area. A second tubular casing is provided which extends downwardly beyond the lower terminating end of the tubular filter element, the second tubular casing including flow-through openings or slots therein for the passage of liquid there through. The second tubular casing flow-through openings are in flow communication with a fluid inlet into the central opening of the filter element. Another device disclosed in US Patent No: 5885452,an effluent filtering apparatus including an effluent filter fluidly connected to the output of an effluent pump disposed in an effluent tank, for providing filtered effluent to a drain field having a plurality of finger pipes defining a plurality of finger apertures. The effluent filter includes a tubular member defining a plurality of filtering orifices through a cylindrical wall. Effluent flows into the tubular member through an open first end and flows out of the tubular member through the filtering orifices, with turbulence within the tubular member preventing at least a portion of solid material present in the effluent from lodging within the filtering orifices. Effluent containing solid material smaller in size than the filtering orifices flows from the effluent tank to the drain field, but larger solid material present in effluent is filtered by the filtering orifices, with the filtering orifices remaining unobstructed for an extended period of time due to turbulent flow within the tubular member. A basket like filter insert may be disposed within the tubular member proximate to the first end, defining a plurality of openings there through permitting flow of effluent but preventing solid material aggregated within the tubular member larger than the dimensions of the openings from flowing backwards from the tubular member and into the pump when the pump is deactivated. Disadvantages of the prior art There are disadvantages associated with conventional device. One of the main disadvantages is that conventional baffle system is complicated in construction. Another disadvantage is that the maintenance of the device is very difficult. Yet another disadvantage is that conventional device migrate solids, grease, or oil into leach field. Still another disadvantage is that conventional device costly in nature. Another disadvantage is that conventional device cannot control the flow of settable and floatable materials. Yet another disadvantage is that the conventional device is required frequent replacement. Object and advantages of the present invention Therefore the main object the present invention is to provide an effluent filtering device for a septic tank in which outlet water should be free from stench and particles of excreta. Another object of the present invention is to provide an effluent filtering device for a septic tank in which no need of baffle walls and dividers Yet another object of the present invention is to provide an effluent filtering device for a septic tank, which prevent floatable, scum, or suspended solids from flowing into the drain field. Still another object of the present invention is to provide an effluent filtering device for a septic tank whose manufacturing cost is cheap, less time and space is required to build. Another object of the present invention is to provide a device that is easy to maintain and do not require skilled or technical knowledge to maintain. Yet another object of the present invention is to provide an effluent filtering device for a septic tank in which any gas forms in chambers go out through holes on the top of the system. Still another object of the present invention is to provide an effluent-filtering device for a septic tank in which multi-filtration facility is available. The following description contains many specifics but these should not be construed as limitations on the scope of the invention. These specifics may be treated as an exemplification of one preferred embodiment thereof. Many other variations are possible. Therefore the scope of the invention should not be limited to the embodiment illustrated ,and the alterations and variations may be treated within the spirit and scope of this invention. Statement of the Invention According to the present invention there is provided an effluent filtering device comprising a filter housing having plurality of cylindrical hollow chambers/pipes, a multification cover being provided at the top which secures said conduit pipes/chambers, outer and middle said pipes/chambers fitted with a cover at bottom end, joints being provided near top end of the inner and outer chamber/pipes such that to facilitate flow filtered water through outlet of filtering device. Brief description of Invention In accordance with this invention an effluent filtering device for a septic tank port in a wall of said septic tank. An effluent filtering device has a filter housing having plurality of cylindrical hollow chambers/pipes disposed in one inside another. A plurality of holes/inlets being provided on the cylindrical surface of the middle and inner said cylindrical chambers/pipes. A multifunction cover with an outlet is provided at the top of the pipes/chambers which secures the conduit pipes. Outer and middle said pipes/chambers fitted with a cover at bottom end. The cover provided at the outer chamber/pipe has a plurality of inlets/holes. The inner chamber/pipe is open from the bottom end. The T-Joints are provided near the top end of the cylindrical surface of the innermost and outermost pipes/chambers to facilitate outlet to remove filtered water from effluent filtering device. A small hollow pipe is provided horizontally inside the T-Joints. Detailed Description regarding the Present Invention An effluent filtering device for a septic tank according to a preferred embodiment is herein described and illustrated in the accompanying drawings wherein; Fig.l shows the perspective view of the device Fig.2 shows the sectional view of the device Fig.3 shows the sectional view of the septic tank having an effluent filtering device Referring to the drawings particularly Fig.l and Fig.2 an effluent filtering device has plurality of cylindrical hollow chambers/pipes preferably three (l,2,and 3) disposed in one inside another. The holes (4) and (5) are provided on the cylindrical surface of the middle cylindrical chambers/pipe (2) and inner cylindrical chamber/pipe (1) respectively. A multifunction cover (6) is provided at the top of the pipes/chambers, which secures the conduit pipes (1,2 and 3) with the help of the solvent cement/adhesive. A small hole/outlet (7) is provided at the top of the multifunction cover to remove the gas produced in effluent filtering device. A cover (8) is provided to close the middle pipe/chamber (2) at bottom and similarly another cover (9) having a plurality of inlets/holes (10) is provided at the bottom of the outer chamber (3). The inner chamber/pipe (1) is open at bottom end (ll).The T-Joints (12 & 13) are provided near the top end of the cylindrical surface of innermost (1) and outermost (3) pipe/chamber to facilitate outlet (14) to remove filtered water from the effluent filtering device. A small hollow pipe/chamber (15) is fitted at inner side of two T-Joints (12) and (13) with the help of the solvent cement/adhesive horizontally. During the operation of the device first of all, effluent filtering device is fixed vertically to outlet pipe of the septic tank at inner side of the tank. The inlet pipe of the septic tank throws mixture of solid and liquid/water in the tank. An effluent filtering device is placed vertically, so only water enters with minute particle of excreta inside the outer pipe (3) through inlet (10). The water with minute particle of excreta get filtered by flowing from outer pipe (3) to middle pipe (2) through the hole (4) and further flow to inside the inner pipe (1) through open bottom side (11). This water from inner pipe (1) is removed with the help of outlet (14) of the filtering device. The sludge /any particles not flow through the filtering device as effluent filtering device is placed vertically inside the tank and works on gravitational principal. If any small particle goes inside the device, it will settle down in outer pipe (3) or middle pipe (2). Any gas produced in filtering device goes out through hole (7) on the top of the device. Thus dewatering and drying of the sewage is possible without wait for settlement of suspended solids at bottom of tank Dated this the 17th day of August 2004 claim: 1. An effluent filtering device for a septic tank comprising a filter housing a plurality of cylindrical hollow chambers / pipes (1, 2 and 3), characterized in that it contains a multifunction cover (6) on top of the said conduit chambers / pipes(l, 2 and 3), another second cover (8 and 9) at the bottom end of the outer and middle said conduit chambers / pipes(3 and 2), and joints (12 and 13) near the top end of the inner and outer chamber / pipes. 2. An effluent filtering device for a septic tank as claimed in Claim 1 wherein the said filter housing has 3 hollow cylindrical conduit chambers / pipes disposed one inside another in a concentric manner. 3. An effluent filtering device for a septic tank as claimed in Claim 2 wherein the said conduit chambers / pipes contain a plurality of holes such that there are 4 holes at bottom of outermost pipe, 4-5 holes at top side of middle pipe, and an outlet in outer pipe. 4. An effluent filtering device for a septic tank as claimed in Claims 1 and 2 wherein the said multifunction cover with an inlet secures the said conduit chambers / pipes at the top end 5. An effluent filtering device for a septic tank as claimed in Claims 1 and 2 wherein the said second cover with a plurality of inlets secures the outer and middle said conduit chambers / pipes at the bottom end 6. An effluent filtering device for a septic tank as claimed in Claim 1 wherein the said joints provided near the top end of the inner and outer chamber / pipes to facilitate flow of filtered water through the outlet of the effluent filtering device 7. An effluent filtering device for a septic tank as claimed in Claim 1 wherein the said joints have a T shape 8. An effluent filtering device for a septic tank as claimed in Claim 1 wherein the said joints comprises of a small hollow chamber / pipe placed horizontally on the inner side of the joints. 9. An effluent filtering device or a septic tank substantially as described herein and illustrated in the accompanying drawings Dated this the 17th day of August 2004

Documents:

0806-che-2004 claims duplicate.pdf

0806-che-2004 description (complete) duplicate.pdf

806-che-2004-abstract.pdf

806-che-2004-claims.pdf

806-che-2004-correspondnece-others.pdf

806-che-2004-correspondnece-po.pdf

806-che-2004-description(complete).pdf

806-che-2004-drawings.pdf

806-che-2004-form 1.pdf

806-che-2004-form 19.pdf

806-che-2004-form 26.pdf

806-che-2004-form 3.pdf

806-che-2004-form 5.pdf