US3746167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for determining the amount of settleable and suspended solids in a liquid
Assignee: Arthur & Ass Inc
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Filing: 1971-09-28
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Granted: 1973-07-17
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Expires: 1991-09-28
Abstract
Abstract A method of and an apparatus for determining the amount of settleable and suspended solids in a liquid. A sample of the liquid is passed to a filtration chamber. The rate of flow of the sample through the filter is monitored and recorded, and from that rate of flow, the amount of settleable and suspended solids in the liquid is determined. If a relatively high concentration of settleable solids is present, the sample can be allowed to stand in the filtration chamber for a preset time before passage through the filter to permit sedimentation to take place.
Inventors
- 👤 R Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:19
CPC Classifications
B; B01; B01D; B01D35/00; B01D37/00; B01D37/04
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
30 words
A method as claimed in claim 1 in which the flow of filtrate through the filter is monitored by sensing the rate of flow of filtrate leaving the filtration chamber.
Claim 2
Dependent Claim
30 words
A method as claimed in claim 1 in which the flow of filtrate through the filter is monitored by continuously weighing the filtrate that has been passed through the filter.
Claim 3
Dependent Claim
35 words
A method as claimed in claim 1 in which the flow of filtrate through the filter is monitored by continuously monitoring the level of liquid within the filtration chamber prior to passage through the filter.
Claim 4
Dependent Claim
36 words
A method as claimed in claim 1 further comprising between steps (a) and (b) the additional step of allowing the water to stand in the filtration chamber a preset time to allow sedimentation of settleable solids.
Claim 5
Dependent Claim
107 words
Apparatus for continuously monitoring the settleable and suspended solids in water from a water treatment plant comprising: a. a filtration chamber having a filter medium therein, having an inlet, and having an outlet and adapted to hold a sample of water; b. automatic and continuous monitoring means for continUously and automatically monitoring the flow of water through the filter medium to provide a continuous signal indicative of the flow of filtrate through the filter medium; and c. continuous recording means connected to said monitoring means to provide a continuous permanent record of the quantity of filtrate passed through the filter medium as a continuous function of time.
Claim 6
Dependent Claim
33 words
Apparatus as claimed in claim 6 in which the recording means is a graphical recorder providing a record of the quantity of filtrate passed through the filter medium as a function of time.
Claim 7
Dependent Claim
35 words
Apparatus as claimed in claim 6 in which the monitoring means comprises flow meter means for measuring the quantity of flow of filtrate passing through the filtration chamber outlet after passage through the filter medium.
Claim 8
Dependent Claim
30 words
Apparatus as claimed in claim 6 in which the monitoring means comprises weighing means for weighing the filtrate passed through the filtration chamber outlet after passage through the filter medium.
Claim 9
Dependent Claim
31 words
Apparatus as claimed in claim 9 in which the weighing means includes a linear differential transformer for providing a signal indicative of the weight of filtrate passed through the filter medium.
Claim 10
Dependent Claim
31 words
Apparatus as claimed in claim 6 in which the monitoring means comprises level sensing means for sensing the level of water within the filtration chamber before passage through the filter medium.
Claim 11
Dependent Claim
56 words
Apparatus as claimed in claim 11 in which the level sensing means includes float means for floating on the surface of water within the filtration chamber before passage through the filter medium and displacement monitoring means for providing a signal indicative of the height of water within the filtration chamber before passage through the filter medium.
Claim 12
Dependent Claim
18 words
Apparatus as claimed in claim 12 in which the linear displacement monitoring means is a linear differential transformer.
Claim 13
Dependent Claim
30 words
Apparatus as claimed in claim 6 in which the filter medium includes a glass fiber filter pad and means for supporting the glass fiber filter pad within the filtration chamber.
Claim 14
Dependent Claim
41 words
Apparatus as claimed in claim 6 in which the filter medium includes a particulate filter medium and in which the filtration chamber includes a backwash inlet and a backwash outlet to permit backwash liquid to flow through the particulate filter medium.
Claim 15
Dependent Claim
27 words
Apparatus as claimed in claim 15 in which the particulate filter medium includes a porous disc connected within the filter chamber and sand upon the porous disc.
Claim 16
Dependent Claim
28 words
Apparatus as claimed in claim 15 in which the particulate filter medium includes a porous disc connected within the filter chamber and diatomaceous earth upon the porous disc.
Claim 17
Dependent Claim
46 words
Apparatus as claimed in claim 6 further comprising a plurality of additional filtration chambers each having a filter medium therein, having an inlet, and having an outlet, said monitoring means continuously and automatically monitoring the flow of water through the filter medium in each filtration chamber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |