Patent US3897600A successfully refreshed from Google Patents.
US3897600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure sewage system and means
Assignee: ROBINTECH Inc
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Filing: 1973-08-20
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Granted: 1975-08-05
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Expires: 1993-08-20
Abstract
Abstract A method and means of directing sewage from a holding tank, septic tank, or the like, into a pressure sewage system which comprises providing a receptacle or storage area for receiving sewage by gravity from a residential or similar source, which receptacle has a downwardly converging or conical bottom region, whereby heavier solid matter in the sewage fluids will be directed into a relatively confined area at the bottom of the reservoir. A sewage-treating unit comprising a macerator and pump is disposed in the apex portion of the bottom of the receptacle or storage area for comminuting the solids, agitating the sewage mixture and transferring the effluent into a relatively small discharge conduit and moving the fluid through the conduit for discharge under a predetermined hydraulic head into the pressure sewage system.
Inventors
- 👤 Jack Burkholder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:03
CPC Classifications
E; E03; E03F; E03F5/00; E03F5/22; E03D; E03D9/00; E03D9/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
180 words
A sewage accumulating and treating unit for receiving gravity-fed sewage through an inlet pipe from a local source, for macerating solids in said sewage and for discharging the resulting effluent under a predetermined pressure into a pressurized sewer main, said unit comprising: a. an accumulation tank having downwardly converging walls, with a frustoconical bottom section for receiving said sewage; b. a centrally-disposed sewage-treating unit for comminuting solids in said sewage and discharging effluent from said tank, said treating unit normally being submerged below the sewage level in said tank and resting upon and being located by said converging walls adjacent to said frustoconical bottom section; and c. a relatively small diameter discharge pipe extending upwardly from said treating unit for connection to said pressurized sewer main; d. said treating unit including a pump and including a pump and including exposed macerating blades located above said pump but nevertheless close to said bottom section, said blades being rotatable about the central axis of said frustoconical section, to agitate said sewage and swirl it into a vortex while said treating unit operates.
Claim 2
Dependent Claim
180 words
A sewage accumulating and treating unit for receiving gravity-fed sewage through an inlet pipe from a local source, for macerating solids in said sewage and for discharging the resulting effluent under a predetermined pressure into a pressurized sewer main, said unit comprising: a. an accumulation tank having downwardly converging walls, with a frustoconical bottom section for receiving said sewage; b. a centrally-disposed sewage-treating unit for comminuting solids in said sewage and discharging effluent from said tank, said treating unit normally being submerged below the sewage level in said tank and resting upon and being located by said converging walls adjacent to said frustoconical bottom section; and c. a relatively small diameter discharge pipe extending upwardly from said treating unit for connection to said pressurized sewer main; d. said treating unit including a pump and including a pump and including exposed macerating blades located above said pump but nevertheless close to said bottom section, said blades being rotatable about the central axis of said frustoconical section, to agitate said sewage and swirl it into a vortex while said treating unit operates.
Claim 3
Dependent Claim
70 words
A sewage accumulating and treating unit as claimed in claim 1, wherein said discharge pipe is the sole structural member extending vertically upward in a region directly adjacent to said treating unit and continues vertically upward from said pump to a point above the uppermost sewage level in said tank, whereby when said upper end is disconnected said discharge pipe is operative for lifting said treating unit from said tank.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |