Patent US4710295A successfully refreshed from Google Patents.
US4710295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Septic tank filters
Assignee: Individual
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Filing: 1985-09-09
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Granted: 1987-12-01
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Expires: 2005-09-09
Abstract
Abstract A filter unit for use in a casing disposed in a septic tank which includes a plurality of stacked disc-dam units to form a cartridge having a longitudinal on each disc-dam unit having a generally circular planar base having a chord edge where the chord edge of each disc-dam is in mutual alignment so that first and second sealing edges are formed at the respective ends of the chord edge where the first and second sealing edges are parallel to the longitudinal axis and where each disc like base includes a continuous elongate dam located on one side of the base and extending outwardly therefrom to terminate at a dam top where the elongate dam has a dam first end adjacent the first sealing edge and extends continuously to a dam second end at said second sealing edge to divide the base into an upstream and downstream side with retaining device to hold the disc-dam units in stacked relation with selected spacing between the dam top of one disc-dam unit and the surface of the next base. Also, the filter unit can be disposed in a cylindrical casing having an open inlet at the bottom where a frustro conical deflector is placed over the inlet so liquid can enter the device by flowing through an annular area between the housing and the base of the deflector and solids carried by the liquid are emitted through the opening formed at the apex of the deflector.
Inventors
- 👤 Robert Zabel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:51
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/28; C02F3/2866; C02F3/288; B; B01; B01D; B01D29/00; B01D29/01; B01D29/05; B01D29/07; B01D29/071; B01D29/44; B01D29/46; B01D35/00; B01D35/02; B01D35/027; B01D35/0276
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
265 words
A filter unit for use in cylindrical casing means adapted to be disposed in a septic tank including: a plurality of stacked disc-dam units to form a cartridge having a longitudinal axis where each disc-dam unit has a generally circular planar base with a chord segment cut away to form a chord edge where the chord edges of each disc-dam is in mutual alignment and first and second sealing edges are formed at the respective ends of the chord edge and the first and second sealing edges are parallel to the longitudinal axis and where each base includes a continuous elongate dam located on one side of the base and extending outwardly therefrom to terminate at a dam top where the elongate dam has a dam first end adjacent said first sealing edge and extends continuously to a dam second end at said second sealing edge to divide said base into an upstream and downstream side; retaining device to hold at least two disc-dam units in stacked relation with the dam top of one disc-dam unit facing one surface of the next base opposite the side carrying the dam wherein said casing means is of selected diameter to receive said filter unit with said longitudinal axis of said filter unit in generally coincident relation with said longitudinal axis of said casing and wherein said casing means includes first and second longitudinal seal means extending generally parallel to said longitudinal axis in spaced relation to engage said first and second sealing edges and outlet means whereby said outlet means communicating with said outlet of said casing.
Claim 2
Dependent Claim
265 words
A filter unit for use in cylindrical casing means adapted to be disposed in a septic tank including: a plurality of stacked disc-dam units to form a cartridge having a longitudinal axis where each disc-dam unit has a generally circular planar base with a chord segment cut away to form a chord edge where the chord edges of each disc-dam is in mutual alignment and first and second sealing edges are formed at the respective ends of the chord edge and the first and second sealing edges are parallel to the longitudinal axis and where each base includes a continuous elongate dam located on one side of the base and extending outwardly therefrom to terminate at a dam top where the elongate dam has a dam first end adjacent said first sealing edge and extends continuously to a dam second end at said second sealing edge to divide said base into an upstream and downstream side; retaining device to hold at least two disc-dam units in stacked relation with the dam top of one disc-dam unit facing one surface of the next base opposite the side carrying the dam wherein said casing means is of selected diameter to receive said filter unit with said longitudinal axis of said filter unit in generally coincident relation with said longitudinal axis of said casing and wherein said casing means includes first and second longitudinal seal means extending generally parallel to said longitudinal axis in spaced relation to engage said first and second sealing edges and outlet means whereby said outlet means communicating with said outlet of said casing.
Claim 3
Dependent Claim
21 words
The invention of claim 1 wherein said casing means includes inlet means communicating with said upstream side of said disc-dam units.
Claim 4
Dependent Claim
31 words
The invention of claim 2 wherein said inlet is in a bottom wall of said casing and said casing includes seal means to engages the bottom most of said disc-dam units.
Claim 5
Dependent Claim
276 words
A filter unit for use in cylindrical casing means adapted to be disposed in a septic tank including: a plurality of stacked disc-dam units to form a cartridge having a longitudinal axis where each disc-dam unit has a generally circular planar base with a chord segment cut away to form a chord edge where the chord edges of each disc-dam is in mutual alignment and first and second sealing edges are formed at the respective ends of the chord edge and the first and second sealing edges are parallel to the longitudinal axis and where each base includes a continuous elongate dam located on one side of the base and extending outwardly therefrom to terminate at a dam top where the elongate dam has a dam first end adjacent said first sealing edge and extends continuously to a dam second end at said second sealing edge to divide said base into an upstream and downstream side; retaining device to hold at least two disc-dam units in stacked relation with the dam top of one disc-dam unit facing one surface of the next base opposite the side carrying the dam longitudinal axis in spaced relation to engage said first and second sealing edges and outlet means whereby said outlet means communicating with said outlet of said casing wherein said casing is cylindrical having an open inlet at the bottom and a frustro conical deflector located over the inlet so liquid can enter the device by flowing through an annular area between the housing and the base of the deflector and solids carried by the liquid are emitted through the opening formed at the apex of the deflector.
Claim 6
Dependent Claim
276 words
A filter unit for use in cylindrical casing means adapted to be disposed in a septic tank including: a plurality of stacked disc-dam units to form a cartridge having a longitudinal axis where each disc-dam unit has a generally circular planar base with a chord segment cut away to form a chord edge where the chord edges of each disc-dam is in mutual alignment and first and second sealing edges are formed at the respective ends of the chord edge and the first and second sealing edges are parallel to the longitudinal axis and where each base includes a continuous elongate dam located on one side of the base and extending outwardly therefrom to terminate at a dam top where the elongate dam has a dam first end adjacent said first sealing edge and extends continuously to a dam second end at said second sealing edge to divide said base into an upstream and downstream side; retaining device to hold at least two disc-dam units in stacked relation with the dam top of one disc-dam unit facing one surface of the next base opposite the side carrying the dam longitudinal axis in spaced relation to engage said first and second sealing edges and outlet means whereby said outlet means communicating with said outlet of said casing wherein said casing is cylindrical having an open inlet at the bottom and a frustro conical deflector located over the inlet so liquid can enter the device by flowing through an annular area between the housing and the base of the deflector and solids carried by the liquid are emitted through the opening formed at the apex of the deflector.
References Cited (Backward Citations)
US3240343A
Cited
US3332552A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-30 | 1991-06-01 | 1991-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-30 | 1995-06-01 | 1995-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-30 | 1999-06-01 | 1999-12-01 | $7700.00 | Window Closed / Lapsed |