Patent US3575185A successfully refreshed from Google Patents.
US3575185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-cleaning dishwasher strainer
Assignee: Motors Liquidation Co
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Filing: 1968-10-23
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Granted: 1971-04-20
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Expires: 1988-10-23
Abstract
Abstract In preferred form, a domestic dishwasher including an improved self-cleaning strainer which removes food particles from washing fluid during its recirculation in a wash phase of operation. It includes an annular screen supported by a fluid distributing rotatable spray bar for rotation therewith and in surrounding relationship to a recirculating pump intake to prevent the entrance of food particles therethrough. A portion of the pump''s output is diverted from the spray bar and directed by a stationary deflector plate through the revolving screen to backflush particles from the screen to prevent clogging. A drain pump with its inlet located below the screen removes both wash water and food particles from the dishwasher during a drain cycle.
Inventors
- 👤 Daniel J Barbulesco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:09
CPC Classifications
A; A47; A47L; A47L15/00; A47L15/42; A47L15/4202; A47L15/4206; A47L15/4208
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
226 words
In a domestic dishwasher the combination of, a housing which encloses an interior space; an access opening through the housing for the placement of dishes in the interior space for washing; movable closure means for covering the access opening and sealing the interior space to prevent fluid leakage therefrom; recirculating pump means in the bottom of the housing having an inlet and an outlet for circulating fluid within the interior space; a fluid directing means fluidly connected to the pump outlet for distributing fluid within the interior space; said fluid directing means being supported within the interior space for rotative movement therein; a motor for driving said pump; screen filter means surrounding said inlet to prohibit entrance of food particles therein; said filter means including means for supporting it for rotative movement with said rotatable fluid directing means; a deflector plate located in a substantially horizontal plane on the pump inlet side of said filter means; passageway means for bypassing fluid from said fluid directing means onto said deflector plate; a downwardly, radially outwardly pointed ramp portion in the deflector plate for directing fluid through a limited extent of said filter means for flushing food particles from its outer surface; said pump inlet receiving fluid from the remainder of said filter means concurrently with flushing of said limited extent to strain particles from recirculated washing fluid.
Claim 2
Dependent Claim
226 words
In a domestic dishwasher the combination of, a housing which encloses an interior space; an access opening through the housing for the placement of dishes in the interior space for washing; movable closure means for covering the access opening and sealing the interior space to prevent fluid leakage therefrom; recirculating pump means in the bottom of the housing having an inlet and an outlet for circulating fluid within the interior space; a fluid directing means fluidly connected to the pump outlet for distributing fluid within the interior space; said fluid directing means being supported within the interior space for rotative movement therein; a motor for driving said pump; screen filter means surrounding said inlet to prohibit entrance of food particles therein; said filter means including means for supporting it for rotative movement with said rotatable fluid directing means; a deflector plate located in a substantially horizontal plane on the pump inlet side of said filter means; passageway means for bypassing fluid from said fluid directing means onto said deflector plate; a downwardly, radially outwardly pointed ramp portion in the deflector plate for directing fluid through a limited extent of said filter means for flushing food particles from its outer surface; said pump inlet receiving fluid from the remainder of said filter means concurrently with flushing of said limited extent to strain particles from recirculated washing fluid.
Claim 3
Dependent Claim
164 words
In an improved domestic dishwasher of the type including a housing with an interior space, closeable access means through the housing for the movement of dishes therethrough for washing, fluid recirculating means having an inlet and outlet in the interior space, and a rotatable fluid directing means fluidly connected to the outlet for distributing fluid within the interior space, the improvement comprising: a circular strainer assembly encircling the inlet and attached to the rotatable fluid directing means for movement therewith; said strainer assembly having an annular screen therein to strain food particles from fluid passing to the inlet; a deflector plate within the strainer assembly in a substantially hOrizontal plane below the outlet; passageway means for bypassing fluid from the fluid directing means onto the horizontal deflector plate; a downwardly, radially outwardly pointed ramp portion in the deflector plate for directing fluid through the surrounding screen of the strainer assembly for flushing food particles from its outer surface while particles are being accumulated thereon.
Claim 4
Dependent Claim
164 words
In an improved domestic dishwasher of the type including a housing with an interior space, closeable access means through the housing for the movement of dishes therethrough for washing, fluid recirculating means having an inlet and outlet in the interior space, and a rotatable fluid directing means fluidly connected to the outlet for distributing fluid within the interior space, the improvement comprising: a circular strainer assembly encircling the inlet and attached to the rotatable fluid directing means for movement therewith; said strainer assembly having an annular screen therein to strain food particles from fluid passing to the inlet; a deflector plate within the strainer assembly in a substantially hOrizontal plane below the outlet; passageway means for bypassing fluid from the fluid directing means onto the horizontal deflector plate; a downwardly, radially outwardly pointed ramp portion in the deflector plate for directing fluid through the surrounding screen of the strainer assembly for flushing food particles from its outer surface while particles are being accumulated thereon.
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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |