Patent US3797509A successfully refreshed from Google Patents.
US3797509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Table ware washer
Assignee: Hitachi Ltd
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Filing: 1971-08-30
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Granted: 1974-03-19
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Expires: 1991-08-30
Abstract
Abstract A device for alternately changing the swing direction of the nozzle arm provided with a plurality of nozzles and installed in a table ware washer; said device comprising two channels for conveying liquid to be jetted from said nozzles to swing the nozzle arm, each channel comprising a liquid inlet compartment and a liquid jet nozzle compartment, said two compartments being disposed opposite to each other with respect to the axis of the nozzle arm (e.g., when the nozzles of one channel are directed right with respect to the nozzle arm axis, the nozzles of the other channel are directed left with respect to the nozzle arm axis) so that the liquid flowing in said two channels is shut out alternately by the use of a ball. Thus, said device is capable of alternately changing the liquid jet direction and thereby changing the swing direction of the nozzle arm alternately.
Inventors
- 👤 S Fukuzawa
- 👤 R Oshima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:12
CPC Classifications
A; A47; A47L; A47L15/00; A47L15/42; A47L15/4278; A47L15/4282
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
308 words
An improvement in table ware washers comprising a basket means for holding table ware; a nozzle arm disposed swingably adjacent said basket means, a plurality of first nozzles in said nozzle arm for jetting a detergent solution forward the table ware, means for supplying said detergent solution to to said first nozzle, control nozzle means including second and third nozzles disposed at one end of said nozzle arm from which the detergent solution is jetted in the direction opposite to the axis of said nozzle arm for exerting a swing force on said nozzle arm in opposite directions, and changeover valve means for alternately applying the detergent solution to said second and third nozzles in response to successive reductions in the pressure of the detergent solution supply to the changeover valve whereby the swing direction of the nozzle arm is alternately changed; the improvement comprising said changeover valve including a housing having second and third compartments provided with said second and third nozzles, respectively, for jetting the detergent solution in mutually opposite directions with respect to said nozzle arm so that a swing force is exerted on said nozzle arm, first and fourth compartments having inlets for sucking the detergent solution jetted from said second and third nozzles, a ball positioned in said housing, and partition means for moving said ball from said first compartment to said second compartment and from said fourth compartment to said third compartment in response to the pressure of the detergent solution and for moving said ball from said third compartment to said first compartment and from said second compartment to said fourth compartment in response to the reduction of the pressure of the detergent solution and also by the weight of said ball itself, whereby the swing direction of the nozzle arm is reversed each time the detergent solution supply is stopped.
Claim 2
Dependent Claim
308 words
An improvement in table ware washers comprising a basket means for holding table ware; a nozzle arm disposed swingably adjacent said basket means, a plurality of first nozzles in said nozzle arm for jetting a detergent solution forward the table ware, means for supplying said detergent solution to to said first nozzle, control nozzle means including second and third nozzles disposed at one end of said nozzle arm from which the detergent solution is jetted in the direction opposite to the axis of said nozzle arm for exerting a swing force on said nozzle arm in opposite directions, and changeover valve means for alternately applying the detergent solution to said second and third nozzles in response to successive reductions in the pressure of the detergent solution supply to the changeover valve whereby the swing direction of the nozzle arm is alternately changed; the improvement comprising said changeover valve including a housing having second and third compartments provided with said second and third nozzles, respectively, for jetting the detergent solution in mutually opposite directions with respect to said nozzle arm so that a swing force is exerted on said nozzle arm, first and fourth compartments having inlets for sucking the detergent solution jetted from said second and third nozzles, a ball positioned in said housing, and partition means for moving said ball from said first compartment to said second compartment and from said fourth compartment to said third compartment in response to the pressure of the detergent solution and for moving said ball from said third compartment to said first compartment and from said second compartment to said fourth compartment in response to the reduction of the pressure of the detergent solution and also by the weight of said ball itself, whereby the swing direction of the nozzle arm is reversed each time the detergent solution supply is stopped.
Claim 3
Dependent Claim
41 words
An improvement in accordance with claim 1 wherein the diameter of the passage for said ball from the first compartment to said second compartment and from the fourth compartment to said third compartment is different from the diameter of said ball.
Claim 4
Dependent Claim
47 words
An improvement in accordance with claim 1 wherein said partition means includes a sloped passage disposed in said housing so that said ball can be moved by its down weight from the third compartment to said first compartment and from the second compartment to said fourth compartment.
Claim 5
Dependent Claim
167 words
In an improved table ware washer comprising a basket means for holding table ware, a nozzle arm disposed swingably adjacent said basket means, a plurality of first nozzles disposed in said nozzle arm for jetting a detergent solution toward the table ware, means for supplying said detergent solution to said first nozzle, and changeover valve means disposed in said nozzle arm; the improvement comprising said changeover valve means including first and second inlets for introducing the detergent solution into said changeover valve means, first and second outlets disposed in said changeover valve means for jetting the detergent solution in the direction opposite to the axis of said nozzle arm for exerting a swing force on said nozzle arm in opposite directions, and a ball positioned in said changeover valve means, said ball being moved between one of the first inlet to the first outlet and the second inlet to the second outlet by the pressure of said detergent solution acting directly on the surface of said ball.
Claim 6
Dependent Claim
167 words
In an improved table ware washer comprising a basket means for holding table ware, a nozzle arm disposed swingably adjacent said basket means, a plurality of first nozzles disposed in said nozzle arm for jetting a detergent solution toward the table ware, means for supplying said detergent solution to said first nozzle, and changeover valve means disposed in said nozzle arm; the improvement comprising said changeover valve means including first and second inlets for introducing the detergent solution into said changeover valve means, first and second outlets disposed in said changeover valve means for jetting the detergent solution in the direction opposite to the axis of said nozzle arm for exerting a swing force on said nozzle arm in opposite directions, and a ball positioned in said changeover valve means, said ball being moved between one of the first inlet to the first outlet and the second inlet to the second outlet by the pressure of said detergent solution acting directly on the surface of said ball.
Claim 7
Dependent Claim
85 words
A table ware washer in accordance with claim 4, wherein said changeover valve means includes four passages for moving said ball, the first passage being provided between said first inlet and said first outlet, the second passage being provided between said first outlet and said second inlet, the third passage being provided between said second inlet and said second outlet, the fourth passage being provided between said second outlet and said first inlet, and wherein said ball closes one of the first and second outlets.
Claim 8
Dependent Claim
49 words
A table ware washer in accordance with claim 5, wherein said ball is moved by the pressure of said detergent solution acting directly on the surface of said ball in said first and third passages, and said ball moving by its own weight in said second and fourth passages.
Claim 9
Dependent Claim
72 words
A table ware washer in accordance with claim 6, wherein the diameter of said first and second outlets of the changeover valve means are smaller than the diameter of said ball, and the inner wall of said first and second outlets are communicated to the inner wall of said passages through a sloped inner wall so that said ball perfectly closes either outlet in response to the pressure of the detergent solution.
References Cited (Backward Citations)
US3160164A
Cited
DE1920575A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |