US3890987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Washing apparatus with auxiliary distributor
Assignee: Whirlpool Corp
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Filing: 1973-06-04
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Granted: 1975-06-24
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Expires: 1993-06-04
Abstract
Abstract A washing apparatus such as a dishwasher having an auxiliary distributor for separately treating certain elements to be washed such as silverware. The auxiliary distributor may comprise a thermal pump which not only effects delivery of the washing liquid onto the silverware, but also effects a heating of the washing liquid for improved washing action. The auxiliary heater is coordinated with the main heater for improved overall dishwashing action in the apparatus.
Inventors
- 👤 Henry Marcussen
- 👤 Rogue D Marcade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:42
CPC Classifications
A; A47; A47L; A47L15/00; A47L15/42; A47L15/4214; A47L15/4219; A47L15/4221; A47L15/4285; A47L15/50; A47L15/502
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
161 words
A washing apparatus comprising: wall means defining a washing chamber having a lower sump; spray means for circulating washing liquid from a main body of washing liquid in said chamber sump against a first and a second group of objects to be washed disposed in said chamber and back to said sump; basket means for holding said second group of objects to be washed separate from said first group; collecting means for collecting a portion of the washing liquid from said sump during the circulation of the washing liquid; heating means for heating the collected portion of the washing liquid to a temperature higher than that of said main body in the chamber sump; and delivery means for delivering said portion of the washing liquid to substantially only said second group of objects in said basket means for high temperature washing of said second group of objects concurrently with the washing thereof by the washing liquid delivered by the spray means.
Claim 2
Dependent Claim
161 words
A washing apparatus comprising: wall means defining a washing chamber having a lower sump; spray means for circulating washing liquid from a main body of washing liquid in said chamber sump against a first and a second group of objects to be washed disposed in said chamber and back to said sump; basket means for holding said second group of objects to be washed separate from said first group; collecting means for collecting a portion of the washing liquid from said sump during the circulation of the washing liquid; heating means for heating the collected portion of the washing liquid to a temperature higher than that of said main body in the chamber sump; and delivery means for delivering said portion of the washing liquid to substantially only said second group of objects in said basket means for high temperature washing of said second group of objects concurrently with the washing thereof by the washing liquid delivered by the spray means.
Claim 3
Dependent Claim
23 words
The washing apparatus of claim 1 wherein said wall means includes a movable door, and said basket means is mounted on said door.
Claim 4
Dependent Claim
54 words
The washing apparatus of claim 1 wherein said wall means includes a movable door and a sump portion for collecting said main body of washing liquid for recirculation thereof against said first and second group of objects, said collecting means opening to said sump portion, and said basket means being mounted on said door.
Claim 5
Dependent Claim
20 words
The washing apparatus of claim 1 including means in said washing chamber for heating said main body of washing liquid.
Claim 6
Dependent Claim
34 words
The washing apparatus of claim 1 wherein said delivery means comprises means responsive to the heating of said washing liquid portion to effect the delivery of said portion of said second group of objects.
Claim 7
Dependent Claim
111 words
A dishwasher comprising: wall means defining a washing chamber; spray means for directing hot washing liquid in said chamber against dishes to be washed disposed in said chamber; basket means for holding silverware to be washed separate from said dishes; a sump for collecting the dishwashing liquid from said washing chamber to be directed by said spray means against said dishes; and thermally operated pump means for delivering a portion of the dishwashing liquid from said sump to substantially only said silverware in said basket means for washing said silverware, said dishwashing liquid portion being returned to said sump for recirculation by said spray means and said thermally operated pump means.
Claim 8
Dependent Claim
111 words
A dishwasher comprising: wall means defining a washing chamber; spray means for directing hot washing liquid in said chamber against dishes to be washed disposed in said chamber; basket means for holding silverware to be washed separate from said dishes; a sump for collecting the dishwashing liquid from said washing chamber to be directed by said spray means against said dishes; and thermally operated pump means for delivering a portion of the dishwashing liquid from said sump to substantially only said silverware in said basket means for washing said silverware, said dishwashing liquid portion being returned to said sump for recirculation by said spray means and said thermally operated pump means.
Claim 9
Dependent Claim
51 words
The dishwasher of claim 6 wherein the thermally operated pump means comprises a vapor pump defining a heating chamber communicating with said sump, and heating means for heating dishwashing liquid in said heating chamber and causing delivery of heated dishwashing liquid therefrom to said silverware as a result of said heating.
Claim 10
Dependent Claim
66 words
The dishwasher of claim 6 wherein the thermally operated pump means comprises a vapor pump defining a heating chamber communicating with said sump, first heating means for heating dishwashing liquid in said heating chamber and causing delivery of heated dishwashing liquid therefrom to said silverware as a result of said heating, and said sump includes a second heating means for heating dishwashing liquid in said sump.
Claim 11
Dependent Claim
96 words
The dishwasher of claim 6 wherein the thermally operated pump means comprises a vapor pump defining a heating chamber communicating with said sump, first heating means for heating dishwashing liquid in said chamber and causing delivery of heated dishwashing liquid therefrom to said silverware as a result of said heating, said sump including a second heating means for heating dishwashing liquid in said sump, and circuit means are provided for energizing said first heating means for heating the liquid in said chamber prior to operation of said spray means to effect a pre-wash of the silverware.
Claim 12
Dependent Claim
31 words
The dishwasher of claim 6 further including means for preventing operation of the thermally operated pump means when the level of dishwashing liquid in the sump is below a preselected level.
Claim 13
Dependent Claim
42 words
The dishwasher of claim 6 wherein said sump includes first heater means for heating the washing liquid in the sump, and said thermally operated pump means includes second heater means for effecting the delivery of said washing liquid portion to the silverware.
Claim 14
Dependent Claim
67 words
The dishwasher of claim 6 wherein said sump includes first heater means for heating the washing liquid in the sump, said thermally operated pump means includes second heater means for effecting the delivery of said washing liquid portion to the silverware, and circuit means are provided for operating said second heater means prior to operation of said first heater means to effect a pre-wash of the silverware.
Claim 15
Dependent Claim
68 words
The dishwasher of claim 6 wherein said sump includes first heater means for heating the washing liquid in the sump, and said thermally operated pump means includes second heater means for effecting the delivery of said washing liquid portion to the silverware, and circuit means are provided for operating said second heater means prior to operation of said first heater means to effect a pre-wash of the silverware.
Claim 16
Dependent Claim
67 words
The dishwasher of claim 6 wherein said spray means includes a pump, said sump includes first heater means for heating the washing liquid in the sump, said thermally operated pump means includes second heater means for effecting the delivery of said washing liquid portion to the silverware, and circuit means are provided for operating said first and second heater means alternatively concurrently with operation of the pump.
Claim 17
Dependent Claim
56 words
The dishwasher of claim 6 wherein said sump includes first heater means for heating the washing liquid in the sump, and said thermally operated pump means includes second heater means for effecting the delivery of said washing liquid portion to the silverware, said first and second heater means comprising electrical heater elements connecTed for concurrent energization.
Claim 18
Dependent Claim
58 words
The dishwasher of claim 6 wherein said sump includes first heater means for heating the washing liquid in the sump, and said thermally operated pump means includes second heater means for effecting the delivery of said washing liquid portion to the silverware, said first and second heater means comprising electrical heater elements connected in series for concurrent energization.
Claim 19
Dependent Claim
55 words
The dishwasher of claim 6 wherein said sump includes first heater means for heating the washing liquid in the sump, and said thermally operated pump means includes second heater means for effecting the delivery of said washing liquid portion to the silverware, said first and second heater means comprising portions of a single heating element.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |