Patent US3718149A successfully refreshed from Google Patents.
US3718149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dish-washer
Assignee: Industrie Zanussi SpA
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Filing: 1971-01-22
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Granted: 1973-02-27
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Expires: 1991-01-22
Abstract
Abstract In a dish-washing machine of the type having two separate washing zones in which delicate tableware and cooking utensils are respectively charged, there being two detergent dispensers, the second of which is capable of supplying detergent only to the cooking utensil washing zone and is operated as a result of the rise of the washing temperature in the zone for the cooking utensils.
Inventors
- 👤 L Mazza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:21
CPC Classifications
A; A47; A47L; A47L15/00; A47L15/42; A47L15/44; A47L15/4409; A47L15/4246; A47L15/4248
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
171 words
In a dish-washing machine of the type having a wash chamber subdivided by a baffle into two zones for the loading of delicate tableware and cooking utensils respectively, a first detergent dispensing device, at least one sprayer for each zone, a single wash pump feeding wash solution to each sprayer, and an interception member controlled by means which senses the temperature of the wash solution to exclude the flow of solution heated above a pre-determined temperature to the delicate tableware in the corresponding zone, the improvement comprising a second detergent dispensing device, a means operably connected to the second dispensing device controlling said second dispensing device to feed a detergent agent contained in the second dispensing device to the washing solution in the stage of the washing cycle in which the zone containing delicate tableware is excluded from the action of the washing solution, said second dispenser being loaded with the same detergent as said first dispenser and/or with a detergent having greater chemical aggressiveness, destined specifically for washing cooking utensils.
Claim 2
Dependent Claim
171 words
In a dish-washing machine of the type having a wash chamber subdivided by a baffle into two zones for the loading of delicate tableware and cooking utensils respectively, a first detergent dispensing device, at least one sprayer for each zone, a single wash pump feeding wash solution to each sprayer, and an interception member controlled by means which senses the temperature of the wash solution to exclude the flow of solution heated above a pre-determined temperature to the delicate tableware in the corresponding zone, the improvement comprising a second detergent dispensing device, a means operably connected to the second dispensing device controlling said second dispensing device to feed a detergent agent contained in the second dispensing device to the washing solution in the stage of the washing cycle in which the zone containing delicate tableware is excluded from the action of the washing solution, said second dispenser being loaded with the same detergent as said first dispenser and/or with a detergent having greater chemical aggressiveness, destined specifically for washing cooking utensils.
Claim 3
Dependent Claim
22 words
The dish-washing machine in accordance with claim 1, in which said controlling means is defined by a timer-programmer and/or by a thermostat.
References Cited (Backward Citations)
CA811501A
Cited
US1447304A
Cited
US1897821A
Cited
US3217721A
Cited
FR1380262A
Cited
US3253784A
Cited
FR1500537A
Cited
US3586011A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |