US4298018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping process
Assignee: Diversey Corp Canada
•
Filing: 1980-07-29
•
Granted: 1981-11-03
•
Expires: 2000-07-29
Abstract
Abstract Method of pumping viscous liquids, e.g., detergents, using an eductor and a predetermined intermittent cycle.
Inventors
- 👤 William J. Haggard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:33
CPC Classifications
F; F17; F17D; F17D1/00; F17D1/08; F17D1/14; F04; F04F; F04F5/00; F04F5/02; F04F5/10; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/0363; Y10T137/0391; Y10T137/8593; Y10T137/86389; Y10T137/86405
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
186 words
The method of pumping a viscous water soluble feed liquid with an eductor pump, said pump having (a) a venturi element; (b) an inlet for drive liquid, said inlet feeding to the jet of the venturi element; (c) an inlet for feed liquid, said inlet feeding to the area beyond the said jet; (d) an outlet tube fed by the venturi element; said pump being submerged in said feed liquid; using water as the drive liquid, said method comprising (1) driving water through the venturi element of the eductor pump on a drive cycle thereby dissolving water soluble liquid in the venturi element and forming a water solution thereof, which solution is driven up the outlet tube and out of the pump; (2) stopping the drive cycle, whereupon water solution in the outlet tube sinks back down into the feed inlet, where it dilutes the viscous feed liquid in the area of the inlet; thereby initiating a rest cycle; (3) alternately repeating Steps (1) and (2), the time of the drive cycle in (1) being about 90-95% of the total of drive cycle plus rest cycle.
Claim 2
Independent Claim
186 words
The method of pumping a viscous water soluble feed liquid with an eductor pump, said pump having (a) a venturi element; (b) an inlet for drive liquid, said inlet feeding to the jet of the venturi element; (c) an inlet for feed liquid, said inlet feeding to the area beyond the said jet; (d) an outlet tube fed by the venturi element; said pump being submerged in said feed liquid; using water as the drive liquid, said method comprising (1) driving water through the venturi element of the eductor pump on a drive cycle thereby dissolving water soluble liquid in the venturi element and forming a water solution thereof, which solution is driven up the outlet tube and out of the pump; (2) stopping the drive cycle, whereupon water solution in the outlet tube sinks back down into the feed inlet, where it dilutes the viscous feed liquid in the area of the inlet; thereby initiating a rest cycle; (3) alternately repeating Steps (1) and (2), the time of the drive cycle in (1) being about 90-95% of the total of drive cycle plus rest cycle.
Claim 3
Dependent Claim
22 words
Method according to claim 1 in which the drive cycle is about 30 seconds and the rest cycle is about 3 seconds.
Claim 4
Dependent Claim
17 words
Method according to claim 1 in which the feed liquid has a viscosity of about 1,000-15,000 cps.
Claim 5
Dependent Claim
15 words
Method according to claim 3 in which the feed liquid is a dish machine detergent.
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) | 1984-11-02 | 1985-05-04 | 1985-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-02 | 1989-05-04 | 1989-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-02 | 1993-05-04 | 1993-11-03 | $7700.00 | Window Closed / Lapsed |