US3802918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dishwasher condenser system
Assignee: Maytag Corp
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Filing: 1972-03-22
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Granted: 1974-04-09
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Expires: 1992-03-22
Abstract
Abstract The dishwashing apparatus of the invention is provided with a cold water supply conduit so that an inside wall can be kept wet with a cold water film during the drying portion of the cycle in order to condense the water evaporated from the dishes.
Inventors
- 👤 W Landwier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:30
CPC Classifications
A; A47; A47L; A47L15/00; A47L15/42; A47L15/48; A47L15/483
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
162 words
In a dishwashing apparatus for performing a cleaning treatment of articles, said apparatus being operable for selectively washing said articles with water during a washing cycle and for evaporating moisture from the articles during a drying cycle by the application of hEat, the combination comprising: means defining a closed washing and drying chamber and including effectively imperforate side walls forming a lining for the chamber, said closed chamber effectively trapping within its confines air and said evaporated moisture, and a cold water supply means having an egress for projecting cold water onto at least one of said side walls to form a cold water film during said drying cycle and provide a water condensing surface within said chamber for condensing the moisture evaporated from the articles, said moisture-laden trapped air being circulated within said chamber under the sole influence of non-mechanically induced circulation including the directing of the water vapors toward the cold water film under the influence of differential vapor pressures.
Claim 2
Dependent Claim
162 words
In a dishwashing apparatus for performing a cleaning treatment of articles, said apparatus being operable for selectively washing said articles with water during a washing cycle and for evaporating moisture from the articles during a drying cycle by the application of hEat, the combination comprising: means defining a closed washing and drying chamber and including effectively imperforate side walls forming a lining for the chamber, said closed chamber effectively trapping within its confines air and said evaporated moisture, and a cold water supply means having an egress for projecting cold water onto at least one of said side walls to form a cold water film during said drying cycle and provide a water condensing surface within said chamber for condensing the moisture evaporated from the articles, said moisture-laden trapped air being circulated within said chamber under the sole influence of non-mechanically induced circulation including the directing of the water vapors toward the cold water film under the influence of differential vapor pressures.
Claim 3
Dependent Claim
24 words
In a dishwashing apparatus as defined in claim 1 wherein said cold water supply means includes a perforate spray tube disposed within said chamber.
Claim 4
Dependent Claim
162 words
In dishwashing apparatus for performing a cleaning treatment of articles, said apparatus being operable for selectively washing said articles with water during a washing cycle and for evaporating moisture from the articles during a drying cycle by the application of heat, in combination, means providing a closed chamber within which the articles are washed with water and dried, said chamber having effectively imperforate side walls forming a lining for the chamber and effectively trapping within its confines air and said evaporated moisture, and condensing means for the closed chamber including cold water spray means located adjacent one of said walls for spraying a film of cold water onto said one wall to form a water condensing surface within said chamber for condensing water vapors from the moisture-laden air trapped within and circulating within said chamber under the sole influence of non-mechanically induced circulation including the directing of the water vapors toward the cold water film under the control of differential vapor pressures.
Claim 5
Dependent Claim
162 words
In dishwashing apparatus for performing a cleaning treatment of articles, said apparatus being operable for selectively washing said articles with water during a washing cycle and for evaporating moisture from the articles during a drying cycle by the application of heat, in combination, means providing a closed chamber within which the articles are washed with water and dried, said chamber having effectively imperforate side walls forming a lining for the chamber and effectively trapping within its confines air and said evaporated moisture, and condensing means for the closed chamber including cold water spray means located adjacent one of said walls for spraying a film of cold water onto said one wall to form a water condensing surface within said chamber for condensing water vapors from the moisture-laden air trapped within and circulating within said chamber under the sole influence of non-mechanically induced circulation including the directing of the water vapors toward the cold water film under the control of differential vapor pressures.
Claim 6
Dependent Claim
25 words
Dishwashing apparatus as defined by claim 3 additionally including a solenoid valve for controlling the supply of cold water to said cold water spray means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |