US4765963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring impurities in water
Assignee: Mitsubishi Electric Corp
•
Filing: 1986-09-24
•
Granted: 1988-08-23
•
Expires: 2006-09-24
Abstract
Abstract A sampled flow of water is extracted from a water conduit 1 carrying impure water by a sampling tube 2, the pressure at a point in the sampling tube is kept constant by a constant pressure maintaining valve 4, and the sampled water passed through a filter 7. The flow rate of sampled water passing through the filter 7 is measured by a flow meter 8. A value corresponding to the total amount or level of impurity in the sampled water is evaluated by an operation circuit 9 at a prescribed time interval, based on the time-dependent change in the result of measurement of the flow meter 8 and the total amount or level of impurities in pure water is thus measured indirectly.
Inventors
- 👤 Yasukazu Mukogawa
- 👤 Katsuhiko Tamura
- 👤 Takaaki Fukumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:15
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/06; G01N2015/0662; Y; Y10; Y10T; Y10T436/00; Y10T436/11; Y10T436/117497
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
165 words
An apparatus for continuously monitoring the level of filterable impurities in a flow of water comprising: a sampling pipe having an outlet and an inlet in communication with a flow of water for continuously removing sample water from said flow; means connected to said sampling pipe for maintaining a water pressure within said sampling pipe at a constant value; filter means disposed at the outlet of said sampling pipe for filtering the sample water passing through said sampling pipe; flow rate detecting means communicating with said apparatus downstream of said filter means for continuously detecting the flow rate of sample water passing through said filter means and generating a corresponding output as a function of time; evaluating means coupled to said flow rate detecting means for determining ratios of the flow rate of the sample water passing through said filter means at predetermined times as compared to an initial flow rate of sample water passing through said filter means; and means for recording said ratios.
Claim 2
Independent Claim
165 words
An apparatus for continuously monitoring the level of filterable impurities in a flow of water comprising: a sampling pipe having an outlet and an inlet in communication with a flow of water for continuously removing sample water from said flow; means connected to said sampling pipe for maintaining a water pressure within said sampling pipe at a constant value; filter means disposed at the outlet of said sampling pipe for filtering the sample water passing through said sampling pipe; flow rate detecting means communicating with said apparatus downstream of said filter means for continuously detecting the flow rate of sample water passing through said filter means and generating a corresponding output as a function of time; evaluating means coupled to said flow rate detecting means for determining ratios of the flow rate of the sample water passing through said filter means at predetermined times as compared to an initial flow rate of sample water passing through said filter means; and means for recording said ratios.
Claim 3
Dependent Claim
20 words
A device according to claim 1, wherein: said filter means comprises a filter element having pores smaller than 0.1 μm.
References Cited (Backward Citations)
DE1726563U
Cited
US3236095A
Cited
DE1598395A1
Cited
US3452586A
Cited
US3499315A
Cited
DE1946505A1
Cited
US3872710A
Cited
US4024754A
Cited
JPS5376891A
Cited
US4123932A
Cited
US4117717A
Cited
US4117715A
Cited
DE2916036A1
Cited
US4263805A
Cited
US4361028A
Cited
US4513607A
Cited
US4446726A
Cited
US4521864A
Cited
US4550591A
Cited
US4554822A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-23 | 1992-02-22 | 1992-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-23 | 1996-02-22 | 1996-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-23 | 2000-02-22 | 2000-08-23 | $7700.00 | Window Closed / Lapsed |