Patent US3750951A successfully refreshed from Google Patents.
US3750951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat system for dishwasher
Assignee: White Consolidated Industries Inc
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Filing: 1971-11-03
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Granted: 1973-08-07
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Expires: 1991-11-03
Abstract
Abstract A dishwasher in which fluid temperature is elevated by the direction of the fluid into heat transferral contact with the electric drive motor which supplies the conventional pumping power. In one embodiment of the invention a split phase motor is employed having windings enclosed in an oil bearing jacket and fluid is circulated both internally and about the periphery of the motor. Another embodiment includes the less conventional shaded pole type of induction motor as the power source and an encapsulated winding construction which provides insulation from but contact with the water for heat exchange.
Inventors
- 👤 R Perl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:17
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/132; A; A47; A47L; A47L15/00; A47L15/42; A47L15/4214; A47L15/4225; A47L15/4285; H02K11/00; H02K11/20; H02K11/25; Y; Y10; Y10T; Y10T137/00; Y10T137/6416; Y10T137/6579
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
180 words
In dishwasher apparatus including a tub and fluid distributing means in the bottom portion thereof, a sump at the bottom of the tub, an electric motor mounted in spaced relation within said sump which generates appreciable heat in the operation thereof, said motor comprising a rotor having fluid flow passages therethrough and a stator, first passage defining means providing directed fluid communication between the tub and that part of the sump containing said rotor, impeller means drivingly connected to the rotor and receiving therefrom fluid from the tub after the same passes through said rotor, said impeller means forcibly delivering the fluid therefrom to an annular space within the sump about the motor, and second passage defining means providing directed communication between said annular space through said first passage defining means to the fluid distributing means for discharge by the latter into a tub, the motor generated heat raising the temperature of the fluid thus circulated from the tub through and over said motor being sufficient to raise fluid temperature by heat exchange therewith to working temperature in the dishwasher.
Claim 2
Dependent Claim
180 words
In dishwasher apparatus including a tub and fluid distributing means in the bottom portion thereof, a sump at the bottom of the tub, an electric motor mounted in spaced relation within said sump which generates appreciable heat in the operation thereof, said motor comprising a rotor having fluid flow passages therethrough and a stator, first passage defining means providing directed fluid communication between the tub and that part of the sump containing said rotor, impeller means drivingly connected to the rotor and receiving therefrom fluid from the tub after the same passes through said rotor, said impeller means forcibly delivering the fluid therefrom to an annular space within the sump about the motor, and second passage defining means providing directed communication between said annular space through said first passage defining means to the fluid distributing means for discharge by the latter into a tub, the motor generated heat raising the temperature of the fluid thus circulated from the tub through and over said motor being sufficient to raise fluid temperature by heat exchange therewith to working temperature in the dishwasher.
Claim 3
Dependent Claim
25 words
Apparatus as set forth in claim 1 wherein said motor is of the induction type having a stator in heat transfer relationship with the fluid.
Claim 4
Dependent Claim
31 words
ApparatUs as set forth in claim 2 wherein said stator of said motor comprise an encapsulation jacket, said jacket being substantially filled with non-conductive liquid for heat transfer to the fluid.
Claim 5
Dependent Claim
30 words
Apparatus as set forth in claim 2 wherein the windings of said stator are encapsulated in plastic, said stator and said plastic being in heat transferral contact with the fluid.
Claim 6
Dependent Claim
16 words
Apparatus as set forth in claim 2 wherein said motor is of the split phase type.
Claim 7
Dependent Claim
16 words
Apparatus as set forth in claim 2 wherein said motor is of the shaded pole type.
Claim 8
Dependent Claim
40 words
The dishwasher as set forth in claim 1 wherein said motor is of the induction type having a stator fixedly supported and a rotor supported for rotation within said stator, said rotor further supporting said impeller means for rotation therewith.
Claim 9
Dependent Claim
33 words
The dishwasher as set forth in claim 7 wherein said stator includes windings thereon energizable from a source of power, said windings being encapsulated in epoxy for heat transferral contact with the fluid.
Claim 10
Dependent Claim
39 words
The dishwasher as set forth in claim 7 further including an annular housing supported from said member, said housing in turn supporting said stator and being substantially filled with oil for transmitting heat from said stator to the fluid.
Claim 11
Dependent Claim
48 words
The dishwasher as set forth in claim 9 wherein said rotor is apertured to provide a path for flow of fluid through the interior of said motor, said stator and said rotor comprising stacks of laminations of relatively wide thickness to encourage eddy current losses and the like.
Claim 12
Dependent Claim
37 words
The dishwasher as set forth in claim 10 wherein said impeller means comprises a housing having blades therein, said housing being closely spaced from said stator housing to provide a restriction against the flow of fluid therebetween.
Claim 13
Dependent Claim
125 words
In a dishwasher having a tub and fluid distributing means therein, a sump at the bottom of the tub, impeller means in said sump for delivering fluid under pressure to said distributing means, electric motor means for driving said impeller means and constructed to generate appreciable heat in the operation thereof, at least a major heat-generating part of said electric motor means being sealed within a housing, liquid dielectric substantially filling said housing and conducting heat thereto from the motor means part contained therewithin, and passage means for circulating fluid from the tub to the impeller means, said passage means including as a part thereof the exterior of said housing to extract heat from the latter and significantly raise the temperature of the circulating fluid.
Claim 14
Dependent Claim
125 words
In a dishwasher having a tub and fluid distributing means therein, a sump at the bottom of the tub, impeller means in said sump for delivering fluid under pressure to said distributing means, electric motor means for driving said impeller means and constructed to generate appreciable heat in the operation thereof, at least a major heat-generating part of said electric motor means being sealed within a housing, liquid dielectric substantially filling said housing and conducting heat thereto from the motor means part contained therewithin, and passage means for circulating fluid from the tub to the impeller means, said passage means including as a part thereof the exterior of said housing to extract heat from the latter and significantly raise the temperature of the circulating fluid.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |