US3576378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid circulation apparatus with submersible pump and motor
Assignee: Whirlpool Corp
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Filing: 1969-06-13
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Granted: 1971-04-27
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Expires: 1989-06-13
Abstract
Abstract A liquid circulation apparatus such as a pump for circulating washing and rinsing liquid in a dishwasher comprising a sump for retaining a body of the liquid, a motor housing located in the sump for immersion in the liquid therein, a motor comprising a rotor and a surrounding stator in the housing, liquid flow passage means through the housing having an entrance connecting with the sump and an exit for discharge of the liquid and liquid impeller means on the rotor within the submersible housing for drawing liquid in through the entrance, forcing it through the passage means and under pressure from the exit.
Inventors
- 👤 James R Hilmanowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:50
CPC Classifications
F; F04; F04D; F04D13/00; F04D13/12; F04D13/14; A; A47; A47L; A47L15/00; A47L15/42; A47L15/4214; A47L15/4225; F04D13/02; F04D13/06; F04D13/0673; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/85978; Y10T137/86131; Y10T137/86139; Y10T137/86147
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
117 words
In a household dishwasher, liquid circulation apparatus, comprising: sump means for retaining a body of liquid; a motor housing in the sump means and including a support forming a part of said sump means; a motor comprising a rotor and a surrounding stator in said housing; liquid flow means through said housing and in contact with the stator having an entrance from said sump and an exit; means for mounting said housing and the motor therein in position to receive liquid through said entrance from said sump means; and liquid impeller means mounted directly on said rotor and within said housing and in said liquid flow means for forcing said liquid from said entrance through said exit.
Claim 2
Dependent Claim
117 words
In a household dishwasher, liquid circulation apparatus, comprising: sump means for retaining a body of liquid; a motor housing in the sump means and including a support forming a part of said sump means; a motor comprising a rotor and a surrounding stator in said housing; liquid flow means through said housing and in contact with the stator having an entrance from said sump and an exit; means for mounting said housing and the motor therein in position to receive liquid through said entrance from said sump means; and liquid impeller means mounted directly on said rotor and within said housing and in said liquid flow means for forcing said liquid from said entrance through said exit.
Claim 3
Dependent Claim
31 words
The apparatus of claim 1 wherein said liquid flow means comprises means spacing said rotor and stator from said housing to provide a liquid passage between the rotor-stator and the housing.
Claim 4
Dependent Claim
50 words
The apparatus of claim 1 wherein there are provided a second Housing adjacent said motor housing, a drain impeller therein, entrance means from said sump means to said drain impeller housing, exit means therefrom to a place of disposal and means operated by said rotor for rotating said drain impeller.
Claim 5
Dependent Claim
70 words
The apparatus of claim 3 wherein said rotor is mounted on an axial shaft and there are provided means on said shaft for mounting the drain impeller, first guide means in said housing for directing liquid through said liquid flow means when said rotor is rotated in one direction and second guide means in said second housing for directing liquid therethrough when said rotor is rotated in the opposite direction.
Claim 6
Dependent Claim
21 words
The apparatus of claim 4 wherein said first guide means also comprise support means for supporting said motor in said housing.
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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |