US3825119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste water treatment unit
Assignee: Individual
•
Filing: 1973-03-08
•
Granted: 1974-07-23
•
Expires: 1993-03-08
Abstract
Abstract A waste water treatment unit, particularly adapted to meet household requirements, has a tank receiving the waste water and a chamber above the tank. A filter within the chamber consists of a downwardly and inwardly tapering fabric bag containing a trickling filter body and has its bottom end open and in communication with the tank. A pump in the tank, operable between maximum and minimum levels, delivers the waste water through a conduit provided with a distributor or diffuser above the filter body and a return pipe in communication with the tank and provided with an aspirator by which returned waste water draws air into the tank. The return pipe adjacent the distributor is of a smaller diameter than the distributor with the result that pressure builds up in the distributor forcing some of the circulating water through lengthwise slits and into the filter with solids continuing with the rest of the water into and through the return pipe. Water passing downwardly through the trickling filter body to the bottom of the bag returns to the tank while that filtered by the bag is discharged from the unit. Time controlled means are also shown for use in aerating the tank contents by circulating them through the chamber and into the return pipe by by-passing the distributor.
Inventors
- 👤 K Rost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:10
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/04; B; B01; B01J; B01J2219/00; B01J2219/30; B01J2219/302; B01J2219/30207; B01J2219/304; B01J2219/30466; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S261/00; Y10S261/72; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87265; Y10T137/87338; Y10T137/87362; Y10T137/8737
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
154 words
A waste water treatment unit comprising a tank having a waste water inlet, a chamber above said tank, a filter in said chamber including a water permeable, downwardly and inwardly inclined container having an open lower end in communication with the interior of said tank and a trickling filter body within said container including a plurality of non-compacting members circulating means including a conduit extending from said tank into said chamber and back into said tank and a pump in said tank in control of said conduit, said conduit including a distributor extending above said body and having outlets disposed to discharge liquid into said filter, means to deliver air into said tank, said pump of a type operative whenever the liquid in the tank rises to a predetermined level and inoperative when it falls to a predetermined lower level, and a discharge operable to receive filtrate passing through the wall of the container.
Claim 2
Dependent Claim
154 words
A waste water treatment unit comprising a tank having a waste water inlet, a chamber above said tank, a filter in said chamber including a water permeable, downwardly and inwardly inclined container having an open lower end in communication with the interior of said tank and a trickling filter body within said container including a plurality of non-compacting members circulating means including a conduit extending from said tank into said chamber and back into said tank and a pump in said tank in control of said conduit, said conduit including a distributor extending above said body and having outlets disposed to discharge liquid into said filter, means to deliver air into said tank, said pump of a type operative whenever the liquid in the tank rises to a predetermined level and inoperative when it falls to a predetermined lower level, and a discharge operable to receive filtrate passing through the wall of the container.
Claim 3
Dependent Claim
15 words
The waste water treatment plant of claim 1 and means operable to aerate the filter.
Claim 4
Dependent Claim
33 words
The waste water treatment plant of claim 1 and at least one connection placing the chamber in communication with the tank enabling air delivered into the tank to flow upwardly into the chamber.
Claim 5
Dependent Claim
23 words
The waste water treatment plant of claim 3 in which the air delivery means is operable whenever the tank contents are being circulated.
Claim 6
Dependent Claim
17 words
The waste water treatment plant of claim 3 in which the air delivery means is time controlled.
Claim 7
Dependent Claim
46 words
The waste water treatment tank of claim 1 and an air inlet in the chamber and the air inlet and the return portion of the conduit are joined in an aspirator-creating relationship in which the returning liquid draws air through the inlet and into the tank.
Claim 8
Dependent Claim
32 words
The waste water treatment plant of claim 6 in which the discharge end of the return portion of the conduit is above the normal upper level of the liquid in the tank.
Claim 9
Dependent Claim
58 words
The waste water treatment tank of claim 5 in which the air delivery means includes means operable to circulate the tank contents, an air inlet in the chamber extends into the tank and the circulating means is connected to the air inlet to use said inlet as a return and to draw air with it into the tank.
Claim 10
Dependent Claim
83 words
The waste water treatment tank of claim 6 and a second conduit extending from the interior of the tank and into the chamber, a second pump in said tank has its outlet in communication with the second conduit, the second pump is joined to the water inlet in an aspirator-creating relationship by which tank contents circulated by the second pump draw air through the inlet, the second pump has its intake below that of the first named pump and includes a time control.
Claim 11
Dependent Claim
34 words
The waste water treatment plant of claim 1 in which the distributor has at least one lengthwise slot that is sufficiently narrow to exclude solids that would tend to clog the trickling filter body.
Claim 12
Dependent Claim
30 words
The waste water treatment plant of claim 10 in which the return portion of the conduit includes a constriction adjacent the distributor operable to increase the pressure in the distributor.
Claim 13
Dependent Claim
54 words
The waste water treatment plant of claim 1 in which the container for the trickling filter body includes a porous bag and a tubular drain to which its lower end is sealed and which extends into the tank and which includes a screen preventing the escape of the members of the trickling filter body.
Claim 14
Dependent Claim
17 words
The waste water treatment plant of claim 12 in which the bag is formed of nylon cloth.
Claim 15
Dependent Claim
29 words
The waste water treatment plant of claim 12 in which the filter includes a support detachably mounted in the chamber, and the bag is detachably attached to the support.
Claim 16
Dependent Claim
18 words
The waste water treatment plant of claim 14 in which tHe distributor is also held by the support.
Claim 17
Dependent Claim
26 words
The waste water treatment plant of claim 1 in which the discharge includes a collector underlying the interior downwardly and inwardly inclined portions of the container.
Claim 18
Dependent Claim
68 words
The waste water treatment plant of claim 1 in which the upper wall of the tank has a port, the lower end of the container is a tubular drain extending into said port and the discharge includes a collector having an inner wall defining a port through which said drain extends and an outer wall disposed and dimensioned to receive liquid filtering through any portion of the container.
Claim 19
Dependent Claim
50 words
The waste water treatment plant of claim 17 in which the tank port and the collector port are dimensioned to freely receive the drain and the drain includes a flange dimensioned to rest on the inner wall of the collector and provided with a skirt freely receiving said inner wall.
Claim 20
Dependent Claim
48 words
The waste water treatment tank of claim 1 in which the tank has a flat top wall and the chamber rests thereon and the top wall has at least one passageway in communication with the interior of the chamber enabling air in the tank to rise into it.
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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |