US4134003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dishwater control
Assignee: Whirlpool Corp
•
Filing: 1977-02-16
•
Granted: 1979-01-09
•
Expires: 1997-02-16
Abstract
Abstract A dishwasher utilizing treating liquid for washing dishes in a treating cycle and air for drying the washed dishes in a drying cycle. An electric heater is provided for heating the dish-treating liquid and the drying air. A control is provided for energizing the heater to heat the treating liquid as an incident of the dishwasher operating in the treating cycle and selectively causing energization of the heater as an incident of the dishwasher operating in the drying cycle. The control further includes structure for preventing energizing of the heater notwithstanding the dishwasher operating in the drying cycle.
Inventors
- 👤 Ronald E. Hahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:57
CPC Classifications
A; A47; A47L; A47L15/00; A47L15/42; A47L15/46; A47L15/4285; A47L15/48; A47L2301/00; A47L2501/00; A47L2501/06; A47L2501/11
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
181 words
In a dishwasher having operating means utilizing treating liquid for washing dishes in a treating cycle and air for drying dishes in a drying cycle, and electric heater means arranged to heat the dish-treating liquid and to heat the dish drying air, an improved control means for energizing said heater means to heat the treating liquid as an incident of the dishwasher operating in said treating cycle, and selectively (a) causing energizing of said heater means as an incident of the dishwasher operating in said drying cycle, or (b) preventing energizing of said heater means notwithstanding the dishwasher operating in said drying cycle, said control means comprising: a first switch for connecting said heater means to a power supply as an incident of the dishwasher operating in said treating cycle; a second switch in parallel with said first switch for connecting said heater means to the power supply as an incident of the dishwasher operating in said drying cycle; and a manually operable control for selectively preventing connecting of the heater means to said power supply by only said second switch.
Claim 2
Dependent Claim
181 words
In a dishwasher having operating means utilizing treating liquid for washing dishes in a treating cycle and air for drying dishes in a drying cycle, and electric heater means arranged to heat the dish-treating liquid and to heat the dish drying air, an improved control means for energizing said heater means to heat the treating liquid as an incident of the dishwasher operating in said treating cycle, and selectively (a) causing energizing of said heater means as an incident of the dishwasher operating in said drying cycle, or (b) preventing energizing of said heater means notwithstanding the dishwasher operating in said drying cycle, said control means comprising: a first switch for connecting said heater means to a power supply as an incident of the dishwasher operating in said treating cycle; a second switch in parallel with said first switch for connecting said heater means to the power supply as an incident of the dishwasher operating in said drying cycle; and a manually operable control for selectively preventing connecting of the heater means to said power supply by only said second switch.
Claim 3
Dependent Claim
24 words
The dishwasher structure of claim 1 wherein said manually operable control comprises a single-pole, single throw switch connected in series with said second switch.
Claim 4
Dependent Claim
35 words
The dishwasher structure of claim 1 wherein said manually operable control means comprises a third switch connected in series with said second switch, the series connection thereof being connected in parallel with said first switch.
Claim 5
Dependent Claim
14 words
The dishwasher structure of claim 3 wherein said third switch comprises a toggle switch.
Claim 6
Dependent Claim
31 words
The dishwasher structure of claim 3 wherein said third switch is arranged to permit said selective control of the energizing of the heater means at any time during the drying cycle.
Claim 7
Dependent Claim
49 words
The dishwasher structure of claim 1 wherein said manually operable control means comprises a third switch connected in series with said second switch, the series connection thereof being connected in parallel with said first switch, the parallel connection of said switches being connected in series with said heater means.
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) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |