US3850344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inverted drum feeder for powdered detergent
Assignee: Calgon Corp
•
Filing: 1972-07-28
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Granted: 1974-11-26
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Expires: 1992-07-28
Abstract
Abstract In the conductivity controlled feeding of detergent and detergent solution to a large automatic dishwasher or similar machine, it is disclosed that the dissolution and feeding of a detergent mass is efficiently accomplished through the use of a solid stream of detergent solution rather than a spray or other diversion of ordinary water; the dry powdered detergent mass can be supported by a screen and a heavier perforated support plate; the support plate includes an opening large enough to permit the passage of the solid stream of liquid into the detergent mass to dissolve the detergent.
Inventors
- 👤 R Burge
- 👤 C Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:39
CPC Classifications
D; D06; D06F; D06F39/00; D06F39/02; A; A47; A47L; A47L15/00; A47L15/42; A47L15/44; A47L15/4436; B; B01; B01F; B01F21/00; B01F21/20; B01F21/22
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
86 words
Apparatus for dissolving detergent comprising a flat screen and a flat support plate therefor for retaining finely divided detergent in an inverted drum, said support being perforated and having a large opening near its center, and, in combination therewith, means for inverting said drum together with said flat screen and flat support plate therefor, reservoir means positioned below the inverted drum to collect and store detergent solution, and means for directing a single stream of detergent solution upwards through said central opening and into the detergent.
Claim 2
Dependent Claim
86 words
Apparatus for dissolving detergent comprising a flat screen and a flat support plate therefor for retaining finely divided detergent in an inverted drum, said support being perforated and having a large opening near its center, and, in combination therewith, means for inverting said drum together with said flat screen and flat support plate therefor, reservoir means positioned below the inverted drum to collect and store detergent solution, and means for directing a single stream of detergent solution upwards through said central opening and into the detergent.
Claim 3
Dependent Claim
123 words
A detergent dissolver for delivering detergent solution to a mechanical washing machine under control of a conductivity sensing device comprising (a) flat screen means for retaining finely divided detergent in an inverted drum, said screen means including a flat support plate therefor defining a opening near its center, (b) a reservoir adapted to collect detergent solution draining from said drum, (c) means for directing a single stream of detergent solution from said reservoir upwards through the central opening of the screen support means into a detergent mass, (d) means for adding fresh water to said reservoir in response to liquid level therein, and (e) means for delivering detergent solution from said reservoir to a mechanical washing machine in response to a conductivity controller.
Claim 4
Dependent Claim
123 words
A detergent dissolver for delivering detergent solution to a mechanical washing machine under control of a conductivity sensing device comprising (a) flat screen means for retaining finely divided detergent in an inverted drum, said screen means including a flat support plate therefor defining a opening near its center, (b) a reservoir adapted to collect detergent solution draining from said drum, (c) means for directing a single stream of detergent solution from said reservoir upwards through the central opening of the screen support means into a detergent mass, (d) means for adding fresh water to said reservoir in response to liquid level therein, and (e) means for delivering detergent solution from said reservoir to a mechanical washing machine in response to a conductivity controller.
Claim 5
Dependent Claim
31 words
Detergent dissolver of claim 2 in which the means for directing detergent solution into a detergent mass and the means for delivering detergent solution to a washer have a common pump.
Claim 6
Dependent Claim
16 words
Detergent dissolver of claim 2 including means for delivering detergent solution to more than one washer.
Claim 7
Dependent Claim
103 words
Method of delivering detergent solution to a dishwasher comprising (a) dissolving dry powdered detergent by inserting an initial single jet of water upwardly into the center of an inverted drum of dry powdered detergent through a flat retaining screen, (b) collecting the detergent solution formed thereby in a reservoir below said inverted drum, (c) recirculating said detergent solution by inserting it in the form of a single jet into the center of said inverted drum, and pumping said detergent solution from said reservoir to a mechanical washing machine in response to a conductivity signal to maintain a desired conductivity in the washing machine.
Claim 8
Dependent Claim
103 words
Method of delivering detergent solution to a dishwasher comprising (a) dissolving dry powdered detergent by inserting an initial single jet of water upwardly into the center of an inverted drum of dry powdered detergent through a flat retaining screen, (b) collecting the detergent solution formed thereby in a reservoir below said inverted drum, (c) recirculating said detergent solution by inserting it in the form of a single jet into the center of said inverted drum, and pumping said detergent solution from said reservoir to a mechanical washing machine in response to a conductivity signal to maintain a desired conductivity in the washing machine.
Claim 9
Dependent Claim
23 words
Method of claim 5 in which the initial insertion of water into the detergent powder is performed with water initially filling said reservoir.
References Cited (Backward Citations)
US218212A
Cited
US2371720A
Cited
US2387945A
Cited
US3092515A
Cited
US3149758A
Cited
US3595438A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |