US3949772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door type dishwasher
Assignee: Hobart Corp
•
Filing: 1974-12-13
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Granted: 1976-04-13
•
Expires: 1994-12-13
Abstract
Abstract A dishwashing machine having a chamber to receive dishes to be washed and a sump to receive liquid for recirculation to the chamber, the sump being positioned below the chamber. The dishwashing machine includes spray arms for spraying liquid on the dishes in the chamber to carry out the washing operation, including a pre-rinse of the dishes. A divider is positioned in the cabinet to separate the chamber and the sump. The divider includes a trough extending across the chamber and a valve is located at one end of the trough. The valve is operative in conjunction with the pre-rinse action to provide for egress of pre-rinse liquid from the chamber. The trough is provided with openings, above the normal level of liquid in the trough during prerinse, to provide liquid communication between the chamber and the sump. A nozzle is located adjacent the end of the trough opposite the valve and projects water axially along the trough to assist in removing refuse from the trough. The machine includes an enclosure mounted externally of the chamber with a filter in the enclosure. Liquid flowing through the valve also flow through the filter prior to going to the drain.
Inventors
- 👤 Stanley G. Hartmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:46
CPC Classifications
A; A47; A47L; A47L15/00; A47L15/0076; A47L15/0081; A47L15/42; A47L15/4251; A47L15/0078
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
112 words
A dishwashing machine comprising: a. a cabinet structure defining a chamber to receive dishes to be washed and a sump to receive liquid for recirculation to said chamber; said sump being positioned below said chamber; b. means for spraying liquid on dishes in said chamber to provide a washing operation on the dishes, including a pre-rinse of the dishes; c. a divider positioned within said cabinet and separating said chamber and said sump, said divider including a trough extending substantially across said chamber; and d. valve means at one end of said trough and operative in conjunction with at least the pre-rinse action to provide for egress of liquid from said chamber.
Claim 2
Dependent Claim
112 words
A dishwashing machine comprising: a. a cabinet structure defining a chamber to receive dishes to be washed and a sump to receive liquid for recirculation to said chamber; said sump being positioned below said chamber; b. means for spraying liquid on dishes in said chamber to provide a washing operation on the dishes, including a pre-rinse of the dishes; c. a divider positioned within said cabinet and separating said chamber and said sump, said divider including a trough extending substantially across said chamber; and d. valve means at one end of said trough and operative in conjunction with at least the pre-rinse action to provide for egress of liquid from said chamber.
Claim 3
Dependent Claim
24 words
A dishwashing machine as set forth in claim 1 further comprising means positioned externally of said cabinet for filtering liquid egressing from said chamber.
Claim 4
Dependent Claim
72 words
A dishwashing machine as set forth in claim 1, further comprising: a. an enclosure mounted externally of said chamber, said valve means providing for selective liquid flow from said chamber to said enclosure in conjunction with at least the pre-rinse action; b. a filter removably mounted in said enclosure to receive liquid flowing from said chamber to remove refuse from the liquid; and c. means for connecting said enclosure to a drain.
Claim 5
Dependent Claim
37 words
A dishwashing machine as set forth in claim 1 further including discharge means positioned to direct a stream of liquid generally axially of said trough toward said valve means to assist in removing refuse from said trough.
Claim 6
Dependent Claim
21 words
A dishwashing machine as set forth in claim 4 including additional discharge means for directing liquid across said divider during pre-rinse.
Claim 7
Dependent Claim
52 words
A dishwashing machine as set forth in claim 5, wherein said trough includes at least one substantially vertical wall portion, above the normal level of pre-rinse liquid in said trough, said at least one substantially vertical wall portion having openings to provide for flow of liquid from said chamber to said sump.
Claim 8
Dependent Claim
42 words
A dishwashing machine as set forth in claim 1 wherein said divider is substantially imperforate and said trough has openings, above the normal level of pre-rinse liquid in said trough to provide for flow of liquid from said chamber to said sump.
Claim 9
Dependent Claim
23 words
A dishwashing machine as set forth in claim 1 wherein a section of said divider, including said trough, is removable from said cabinet.
Claim 10
Dependent Claim
110 words
A dishwashing machine comprising: a. a cabinet structure defining a chamber to receive dishes to be washed and sump to receive liquid for recirculation to said chamber; said sump being positioned below said chamber; b. spray means for spraying liquid on the dishes to wash and to rinse the dishes; c. additional spray means for spraying liquid on the dishes to pre-rinse the dishes; d. a divider forming the bottom wall of said chamber; said divider including an elongated trough to receive liquid sprayed on the dishes; and e. valve means provided and one end of said trough and selectively operable to provide for egress of liquid from said chamber.
Claim 11
Dependent Claim
110 words
A dishwashing machine comprising: a. a cabinet structure defining a chamber to receive dishes to be washed and sump to receive liquid for recirculation to said chamber; said sump being positioned below said chamber; b. spray means for spraying liquid on the dishes to wash and to rinse the dishes; c. additional spray means for spraying liquid on the dishes to pre-rinse the dishes; d. a divider forming the bottom wall of said chamber; said divider including an elongated trough to receive liquid sprayed on the dishes; and e. valve means provided and one end of said trough and selectively operable to provide for egress of liquid from said chamber.
Claim 12
Dependent Claim
64 words
A dishwashing machine as set forth in claim 9, further comprising: a. an enclosure mounted externally of said chamber, said valve means providing for selective liquid flow from said chamber to said enclosure; b. a filter removably mounted in said enclosure to receive liquid flowing from said chamber to remove refuse from said liquid; and c. means for connecting said enclosure to a drain.
Claim 13
Dependent Claim
86 words
A dishwashing machine as set forth in claim 9, wherein: said trough includes a lower imperforate section and at least one perforated wall section above said imperforate section; said at least one perforated wall section providing for flow of liquid from said chamber to said sump; said imperforate section of said trough being sufficiently large that when said valve is open, the liquid received in said trough during pre-rinse of the dishes will not rise to the level of said at least one perforated wall section.
Claim 14
Dependent Claim
37 words
A dishwashing machine as set forth in claim 9 further including discharge means positioned to direct a stream of liquid generally axially of said trough toward said valve means to assist in removing refuse from said trough.
Claim 15
Dependent Claim
21 words
A dishwashing machine as set forth in claim 12 including additional discharge means for directing liquid across said divider during pre-rinse.
Claim 16
Dependent Claim
52 words
A dishwashing machine as set forth in claim 9, wherein: said divider includes spaced apart stationary sections; and said trough is pivotably mounted for movement between a position in interfering relationship with said stationary sections to complete said divider and a position clear of said stationary sections for removal from said machine.
References Cited (Backward Citations)
US1719409A
Cited
US1952568A
Cited
US2154559A
Cited
US2619099A
Cited
US3624750A
Cited
US3669132A
Cited
US3717159A
Cited
US3868960A
Cited
US3807419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |