US4184347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic washing machine
Assignee: Hitachi Ltd
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Filing: 1979-01-17
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Granted: 1980-01-22
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Expires: 1999-01-17
Abstract
Abstract An automatic washing machine in which an initial filling time required for filling a tub with water to a predetermined level at the start of a washing process is measured and stored in a memory, whereby time required for rinsing process is automatically determined on the basis of the measured initial filling time. Means is provided for determining the rinsing time duration on the basis of a preset rinsing time stored in the memory in place of the measured filling time when the latter is abnormally short, thereby to assure an adequate rinsing action.
Inventors
- 👤 Hideyuki Tobita
- 👤 Toshio Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:27
CPC Classifications
D; D06; D06F; D06F33/00; D06F33/30; D06F33/32; D06F33/38; D06F2103/00; D06F2103/38; D06F2105/00; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/729
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
240 words
An automatic washing machine, comprising an outer housing, an outer tub supported in said housing, a spinning and washing tub rotatably supported in said outer tub, a rotatable wing member for agitating water contained in said spinning and washing tub, drive means for actuating said rotatable wing member at washing and rinsing processes and for rotating said spinning and washing tub at spinning process, a water supply system for supplying water to said outer tub, a water drain system for draining water from said outer tub, storage means for programming and storing operating time durations and operating sequence of said drive means, said water supply system and said water drain system or combinations thereof, means for selecting a desired program from those stored in said storage means, control means for controlling operations of said drive means, said water supply system and said water drain system in accordance with said selected program thereby to effect the washing, rinsing and spinning processes, and means for measuring a filling time required for filling said outer tub with water to a predetermined level at the start of said washing process and arithmetically determining a water feeding time duration for said rinsing process on the basis of said measured filling time, wherein said water feeding time duration at said rinsing process is determined on the basis of a preset rinsing time duration stored in said storage means when said measured filling time is abnormally short.
Claim 2
Dependent Claim
240 words
An automatic washing machine, comprising an outer housing, an outer tub supported in said housing, a spinning and washing tub rotatably supported in said outer tub, a rotatable wing member for agitating water contained in said spinning and washing tub, drive means for actuating said rotatable wing member at washing and rinsing processes and for rotating said spinning and washing tub at spinning process, a water supply system for supplying water to said outer tub, a water drain system for draining water from said outer tub, storage means for programming and storing operating time durations and operating sequence of said drive means, said water supply system and said water drain system or combinations thereof, means for selecting a desired program from those stored in said storage means, control means for controlling operations of said drive means, said water supply system and said water drain system in accordance with said selected program thereby to effect the washing, rinsing and spinning processes, and means for measuring a filling time required for filling said outer tub with water to a predetermined level at the start of said washing process and arithmetically determining a water feeding time duration for said rinsing process on the basis of said measured filling time, wherein said water feeding time duration at said rinsing process is determined on the basis of a preset rinsing time duration stored in said storage means when said measured filling time is abnormally short.
Claim 3
Dependent Claim
27 words
An automatic washing machine as set forth in claim 1, wherein said rinsing process includes a rinsing step with spinning and a rinsing step with water feeding.
Claim 4
Dependent Claim
29 words
An automatic washing machine as set forth in claim 1, wherein said program selecting means is disposed in a console panel provided at a top plane of said housing.
References Cited (Backward Citations)
JPS5028171A
Cited
US3835880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-21 | 1983-07-23 | 1984-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-21 | 1987-07-23 | 1988-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-21 | 1991-07-23 | 1992-01-22 | $7700.00 | Window Closed / Lapsed |