US4120033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for determining pumping system head curves
Assignee: CORPORATE EQUIPMENT Co
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Filing: 1977-01-04
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Granted: 1978-10-10
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Expires: 1997-01-04
Abstract
Abstract There is disclosed apparatus and method for determining pumping head requirements for an operating pumping system by subtracting a desired delivery head or pressure from an actual head. The difference represents overpressure, and this overpressure is subtracted from a measured pump total dynamic head to establish the pumping head requirement of the system. The pumping head requirement data is recorded together with other data indicating a measured fluid flow rate. The data so recorded is in a form for plotting a system head curve. Once the system head curve is available it is possible to modify the supply system so as to avoid pumping at a pressure in excess of that which may be required for any given flow rate condition. Such avoidance of overpressure pumping produces an energy saving in the operation of the pumping system.
Inventors
- 👤 Anthony Bruce Corso
- 👤 James Burton Rishel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:42
CPC Classifications
E; E03; E03B; E03B7/00; E03B7/04; E03B5/00; E03B7/07; E03B7/075; G; G01; G01D; G01D1/00; G01D1/16; G06; G06G; G06G7/00; G06G7/48; G06G7/57; Y; Y10; Y10T; Y10T137/00; Y10T137/0753; Y10T137/0801; Y10T137/085; Y10T137/8158
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
121 words
Recording apparatus for a fluid supply system comprising first measuring means for generating a first signal indicative of the actual pumping head at a supply point for said system, second measuring means for generating a second signal indicative of the actual fluid delivery pressure at a delivery point in said system, signal generating means for generating a third signal indicative of a desired fluid delivery pressure at said delivery point, combining means for combining said first, second and third signals to obtain a fourth signal indicative of said first signal reduced by an amount equal to the difference between said second and third signals, and first recording means for recording said fourth signal as an indication of a system head requirement.
Claim 2
Dependent Claim
121 words
Recording apparatus for a fluid supply system comprising first measuring means for generating a first signal indicative of the actual pumping head at a supply point for said system, second measuring means for generating a second signal indicative of the actual fluid delivery pressure at a delivery point in said system, signal generating means for generating a third signal indicative of a desired fluid delivery pressure at said delivery point, combining means for combining said first, second and third signals to obtain a fourth signal indicative of said first signal reduced by an amount equal to the difference between said second and third signals, and first recording means for recording said fourth signal as an indication of a system head requirement.
Claim 3
Dependent Claim
39 words
Apparatus according to claim 1 further comprising a flow meter for generating a fifth signal indicative of the fluid flow supply rate accompanying aforesaid pumping head and fluid delivery pressure and second recording means for recording said fifth signal.
Claim 4
Dependent Claim
45 words
Apparatus according to claim 2 wherein said combining means comprises means for generating a sixth signal representing the difference between the pressures represented by said second and third signals and means for combining said sixth signal with said first signal to produce said fourth signal.
Claim 5
Dependent Claim
21 words
Apparatus according to claim 3 wherein said first signal represents total dynamic head delivered by a supply pump for said system.
Claim 6
Dependent Claim
62 words
Apparatus according to claim 2 further comprising means for generating an energy consumption signal, means for combining said fourth and fifth signals to produce a seventh signal indicative of the product of the values indicated by said fourth and fifth signals and third recording means responsive to said seventh signal and to said energy consumption signal for recording a computed system efficiency.
Claim 7
Dependent Claim
110 words
Apparatus for generating a pumping system head curve comprising means for making repeated measurements of the overpressure at a delivery point in said system, means for making a series of measurements of the head at a supply point for said system in correspondence with said overpressure measurements, means for measuring a series of flow rates from said supply point to said delivery point in correspondence with said overpressure measurements and said head measurements, means for subtracting said overpressure measurements from said head measurements to obtain a series of required head indications, and means for recording said required head indications against the corresponding measured flow rates to define said head curve.
Claim 8
Dependent Claim
110 words
Apparatus for generating a pumping system head curve comprising means for making repeated measurements of the overpressure at a delivery point in said system, means for making a series of measurements of the head at a supply point for said system in correspondence with said overpressure measurements, means for measuring a series of flow rates from said supply point to said delivery point in correspondence with said overpressure measurements and said head measurements, means for subtracting said overpressure measurements from said head measurements to obtain a series of required head indications, and means for recording said required head indications against the corresponding measured flow rates to define said head curve.
Claim 9
Dependent Claim
30 words
Apparatus according to claim 6 wherein said overpressure measuring means comprises means for measuring the actual pressure at said delivery point, and subtracting therefrom a desired pressure at said point.
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) | 1981-10-09 | 1982-04-10 | 1982-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-09 | 1986-04-10 | 1986-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-09 | 1990-04-10 | 1990-10-10 | $7700.00 | Window Closed / Lapsed |