US3747766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous filter system for waste using roll filter paper or other self cleaning filter
Assignee: Astrotronic Research Ltd
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Filing: 1970-12-28
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Granted: 1973-07-24
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Expires: 1990-12-28
Abstract
Abstract Household and other waste consisting of liquid and solids conveyed by water is discharged into the system through the inlet pipe. Filter paper from a roll is fed around the inlet pipe and formed into a tube, which continues beyond the end of the inlet pipe and encapsulates all the waste. The end of the inlet pipe and the extending paper tube are enclosed in a perforated or porous pipe which prevents the tube from opening. A screw in the last half of the porous pipe twists the paper into nodules enclosing solid waste while the liquid waste is squeezed and filtered through the paper and the perforated pipe. A dehydrator fed by the screw decomposes the filter paper and solid waste matter contained therein.
Inventors
- 👤 F Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:35
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/34; C02F1/36; B; B01; B01D; B01D24/00; B01D24/02; B01D24/10; B01D24/16; B01D24/165; B01D24/48; B01D24/4869; B01D29/00; B01D29/09; B01D29/093; B01D29/11; B01D29/117; B01D29/50; B01D29/56; B01D29/58; B01D29/62; B01D29/64; B01D29/6469; B01D29/6484; B01D29/76; B01D29/80; B01D29/84; B01D29/843; B01D29/88; B01D29/94; B01D33/00; B01D33/01; B01D33/03; B01D33/0307; B01D33/033; B01D33/0346; B01D35/00; B01D35/18; B01D36/00; B01D36/02; B01D36/04; C02F1/30; C02F1/32
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
129 words
Apparatus for treatment of waste having solid and liquid components comprising holding means for holding a flat web of fibrous filter material, feeding means for feeding said web from said holding means and curling said web into a tubular shape with edges of said web overlapping, waste discharge means for depositing said waste inside said tubular shape, said waste discharge means comprising a pipe, said tubular shape being formed around said pipe, said tubular shape extending beyond the end of said pipe in a direction away from said holding means, expressing means for forcing said liquid components through said tubular shape while encapsulating said solid components inside said tubular shape, and solid disposal means for disposing of both said solid waste and the filter material encapsulating said solid waste.
Claim 2
Dependent Claim
129 words
Apparatus for treatment of waste having solid and liquid components comprising holding means for holding a flat web of fibrous filter material, feeding means for feeding said web from said holding means and curling said web into a tubular shape with edges of said web overlapping, waste discharge means for depositing said waste inside said tubular shape, said waste discharge means comprising a pipe, said tubular shape being formed around said pipe, said tubular shape extending beyond the end of said pipe in a direction away from said holding means, expressing means for forcing said liquid components through said tubular shape while encapsulating said solid components inside said tubular shape, and solid disposal means for disposing of both said solid waste and the filter material encapsulating said solid waste.
Claim 3
Dependent Claim
29 words
ApparatuS according to claim 1 in which said expressing means comprises a perforated conduit surrounding the terminus of said waste discharge means and a stretch of said tubular shape.
Claim 4
Dependent Claim
25 words
Apparatus according to claim 2 in which said expressing means further comprises means for expressing liquid out of said tubular shape by twisting said shape.
Claim 5
Dependent Claim
24 words
Apparatus according to claim 3 in which said last named means comprises a helical flight within said tubular means and within said perforated conduit.
Claim 6
Dependent Claim
25 words
Apparatus according to claim 1 in which said solid disposal means comprises a dehydrator into which said tubular shape and encapsulated solid waste are received.
Claim 7
Dependent Claim
39 words
Apparatus according to claim 1 which further comprises secondary filter means, means for forcing liquid components discharged from said first-mentioned filter means through said secondary filter means and a reservoir to collect liquid discharged from said secondary filter means.
Claim 8
Dependent Claim
32 words
Apparatus according to claim 6 in which said secondary filter means comprises a sump for collection of solids filtered by said secondary filter means and means for removing solids from said sump.
Claim 9
Dependent Claim
16 words
Apparatus according to claim 6 in which said secondary filter means comprises a bed of aggregate.
Claim 10
Dependent Claim
15 words
Apparatus according to claim 6 in which said secondary filter means comprises a screen-type filter.
Claim 11
Dependent Claim
23 words
Apparatus according to claim 6 which further comprises means between said secondary filter means and said reservoir for destroying bacteria in said liquid.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |