US3174489A - Dishwashing apparatus - Google Patents

Dishwashing apparatus Download PDF

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Publication number
US3174489A
US3174489A US145224A US14522461A US3174489A US 3174489 A US3174489 A US 3174489A US 145224 A US145224 A US 145224A US 14522461 A US14522461 A US 14522461A US 3174489 A US3174489 A US 3174489A
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United States
Prior art keywords
tub
liquid
pump
washing
discharge
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Expired - Lifetime
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US145224A
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English (en)
Inventor
David A Jellies
John D Seal
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General Electric Co
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General Electric Co
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Filing date
Publication date
Priority to BE623615D priority Critical patent/BE623615A/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US145224A priority patent/US3174489A/en
Priority to GB37589/62A priority patent/GB1011877A/en
Priority to FR912376A priority patent/FR1343772A/fr
Priority to CH1212762A priority patent/CH395454A/de
Application granted granted Critical
Publication of US3174489A publication Critical patent/US3174489A/en
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4244—Water-level measuring or regulating arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/087—Water level measuring or regulating devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/09—Water level
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/01—Water supply, e.g. opening or closure of the water inlet valve
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/02—Water discharge, e.g. opening or closure of discharge valve
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/05—Drain or recirculation pump, e.g. regulation of the pump rotational speed or flow direction

Definitions

  • This invention relates to dishwashing apparatus of the type in which the articles to be washed are automatically subjected to a timed schedule including washing and rinsing operations; and in particular, the invention relates to a means whereby the operational cycle may be timed without conventional time-clock operated switches.
  • a time switch in which a timer motor drives a cam shaft having a plurality of cams each associated with a switch in a circuit controlling a particular phase of the operational system.
  • One circuit for example, periodically closes and opens to control the motor driving a pump, impeller or other liquid circulation device; unless the mech anism is one in which a reversible motor operates a discharge pump which responds to reverse rotation, it is necessary to have a cam-operated switch periodically control the pump motor.
  • a third switch and circuit periodically closes and opens to control a solenoid valve through which the water is introduced into the dishwasher for the washing and rinsing operations, for it is the present prac tice to open the water valve for a sufiicient period before each washing or rinsing operation to introduce the re quired amount of water into the tub, and then to shut off water flow during the actual washing or rinsing period.
  • the operation of the conventional dishwasher controlling mechanism requires the frequent operation of a number of electrical switches, and while it may be said that this type of operational control is basically satisfactory, it is, nevertheless, the experience of dishwasher manufacturers that the cycle controlling devices are a frequent source of service troubles.
  • the desired washing or rinsing interval can be timed without interruption of the operation of the respective pumping systems.
  • the motor which concurrently drives the water circulation pumping system and the discharge pump system is of the unidirectional type, and may be a shadedpole motor instead of the much more expensive induction motor now universally used in dishwashers of the domestic type.
  • the contacts in the switch system of the energizing circuit for the main motor operate only once during the entire sequence of operations; that is, they close at the start of the first washing operation and remain closed until the final rinsing operation has been completed. We therefore substantially eliminate wear on switch contacts and thus minimize a potential trouble source.
  • the object of the invention to provide a dishwasher of the automatic cycling type embodying a control system which does not require a time clock and in which the number of individual circuit switches is substantially reduced.
  • FIG. 1 is a front elevational view of a dishwasher embodying the present invention, with the greater portion of the cabinet door having been broken away and the dishwasher tub and external housing being shown in section;
  • FIG. 2 is an enlarged view of one form of means for delaying flow of liquid to the discharge pump
  • FIG. 3 is a schematic plan view showing a preferred arrangement of the single drive motor for the main circulation pump and the discharge pump;
  • FIG. 4- is a somewhat schematic figure of the presently preferred stepping relay which controls the energizing circuit
  • FIG. is a schematic showing of an adjustable siphoning mechanism
  • FIGS. 6, 7 and 8 disclose circuits showing dishwasher control circuits
  • FIG. 9 is a graph showing the relationship of washing interval to the filling interval.
  • the dishwasher 1 includes an external cabinet 2 within which is suitably supported a tub 3 for accommodating the articles to be washed.
  • the tub 3 is open at the front and the cabinet 2 is provided with a swing-down door 4 hinged at the bottom to be manually operable between a vertically closed position and a substantially horizontal open position.
  • the upper and lower track ways 5 and 6 which respectively accommodate the upper rack 7 and the lower r-ack 8 within which the articles to be washed are placed.
  • each of the racks may be drawn from the tub for the purpose of loading or unloading.
  • a conventional solenoid operated valve preferably having facilities providing a uniform flow rate over a wide range of water inlet pressures.
  • a valve for example, is disclosed in D. H. Halenza United States Patent No. 2,500,750, granted March 14, 1950, and manufactured and sold by the Dole Valve Company of Chicago, Illinois, the assignee of the said Halenza patent.
  • the solenoid valve 10 is connectable to the building hot water supply system (not shown) and has a gooseneck discharge tube 11 which discharges into the tub fill tube 12 which at its bottom communicates with the tub through a side wall opening therein (not shown). It will be understood that to meet code requirements the outlet end of the tube 11 is placed at least one inch above the inlet of the fill tube 12 so as to prevent backflow of water from the tub into the tube 11.
  • the washing and rinsing operations are accomplished by subjecting the dishwasher to sprays or streams of liquid ejecting through a conventional rotating spray nozzle device 14- rotatably mounted on a tubular hub 15 by a suitable vertically disposed pivot 16 supported on a spider 17 which offers little obstruction to liquid flow through the hub.
  • the spray nozzle device has a plurality of liquid ejection ports distributed over its upper surface and has, in diametrically opposed side wall portions, means such as a nozzle 13 through which liquid ejects and creates reaction forces which cause the device 14 to rotate. In this way an effective liquid spray pattern is created to subject all of the articles in the tub to a proper washing or rinsing action.
  • Liquid is supplied to the spray device 14 by well known means such as a centrifugal pump 20 having its inlet connection 21 in the bottom of the dishwasher tub sump 22 and its outlet 23 (FIGURE 3) communicating directly with the liquid supply hub 15. It will be understood that the inlet 21 will be suitably screened to prevent large articles of food material from entering the pump 20.
  • a centrifugal pump 20 having its inlet connection 21 in the bottom of the dishwasher tub sump 22 and its outlet 23 (FIGURE 3) communicating directly with the liquid supply hub 15. It will be understood that the inlet 21 will be suitably screened to prevent large articles of food material from entering the pump 20.
  • a second centrifugal pump 26 vented to insure priming, by way of a tube 24 which enters any convenient place in the pump casing or discharge system.
  • Said pump has an inlet pipe 27 arranged to receive liquid from the tub as later described, and an outlet pipe 2 8 which rises within the cabinet walls to a point at which connection is made to the plumbing waste line (not shown) of the building.
  • the discharge line 28 rise to a point above the maximum fill level of an adjacent kitchen sink and then to discharge by way of a suitable fitting providing an air gap, into a line connecting directly with the waste trap below the sink.
  • each of the pumps 20 and 26 may be driven from a single electric motor 30 having a double ended shaft accommodating the impellers (not shown) of the centrifugal pumps. Because the motor is subjected to very little starting torque, operates continuously during the washing and rinsing sequence, and is not required to reverse, it is entirely satisfactory to use the inexpensive shaded pole type of motor.
  • the entire assembly of pumps and motor may be appropriately mounted on a support plate 31 aflixed to the underside of the tub 3, as suggested in FIGURE 2. For simplicity of representation the precise manner of supporting the motor and its associated pumps has not been detailed.
  • a siphon device 32 which establishes the maximum level attained by the washing or rinsing liquid before flow to the pump 26 can take place, and yet provides for substantially complete drainage of the waste liquid from the sump 22.
  • a siphon device includes the vertically extending tube 33 in fixed relation to the bottom wall of the tub (as by welding or otherwise securing to the mounting plate 31) and extending upwardly into the tub to the desired operational water level.
  • Said tube 33 'rernovably accommodates a cap 34 which may have any 'desired arrangement of radially extending vertical ribs 35 which act to support the cap on the tube, but do not interfere with the passage of liquid.
  • a cylindrical skirt portion 36 of the cap is intended to rest upon the bottom of the sump 22 of the tub.
  • a plurality of openings 37 and 38 respectively distributed about the periphery of the skirt and its top wall, provide for the passage of water from the tub.
  • a drain tube 40 telescopically receives within itself the leg portion 41 of a relatively conventional siphon loop 42.
  • the inlet end of said loop 42 is provided with an expansion sleeve 43 biased so that it tends to extend downwardly against the wall of the sump 22, while being spaced therefrom by spacing lugs or the like 44.
  • a wing screw 45 extending through the wall of tube 40 secures the loop 42 in an adjusted position. For example, if it is desired to increase the overflow level of the spent liquid, the siphon 42 may he slid upwardly and locked in adjusted position by the wing screw 45.
  • leg member 41 is telescoped further into the tube 4% and again secured in position.
  • the expansion or the contraction of the terminal portion 43 accommodates this adjustment while maintaining the lugs 44 against the base of the sump.
  • the downstream side of the pump 26 is provided with a pressure responsive ratchet actuator shown best in FIGURE 4.
  • the actuator 5t may be accommodated on a bracket 52 attached to a portion of the centrifugal pump 20 or other structure which will maintain a fixed reltaionship tothe assembly of main and discharge pumps and drive motor.
  • the actuator 50 comprises an insertion in a tubular discharge line 28.
  • the discharge tube may be of rubber, secured to the ends of the actuator body portion 51 by means such as conventional tube clamps 53.
  • actuator St It is the function of actuator St to sense a positive pres sure condition in discharge line 28 and to operate a device which totals a predetermined number of such pressure conditions .and thereupon interrupts the dishwasher motor energy circuit as presently described.
  • a volume of liquid will return to the pump 26 after the motor circuit is interrupted. This condition is used to advantage, as presently described.
  • the body portion 51 of the actuator St has an open top which is closed by a diaphragm 54 of appropriate area. Said diaphragm is maintained in position by means of a vented cap 55 screwed or otherwise fastened to the body 51.
  • An actuating system 56 suitably secured to the diaphragm 54 at its center projects slideably upwardly through an appropriate opening in the cap 55 and a matching opening in the frame 58 which provides a main supporting structure for a switch stack 60.
  • Said switch stack is relatively conventional and includes an insulating block 61 which insulatedly accommodates a rigid fixed contact arm 62 and a flexible contact arm 63, the latter being biased so as normally to effect closure of the associated contact elements.
  • the springable contact arm 63 terminates in a cam follower portion 64.
  • the insulating block 61 accommodates the upper and lower contact structures 65 and 66 respectively, said contact structures being appropriately biased so as to normally eiiect closure of their associated contacts.
  • An appropriate device as illustrated in FIGURE 4 comprises a rigid lever 72 pivotally mounted on the upright of the structure 58 and terminating in the escapement 73.
  • the escapement is pivotally mounted on the end of the lever 72 and is suitably spring biased to tend to rotate in a counterclockwise direction as viewed in FIGURE 4.
  • the escapement device comprises a first leg 74- and a second leg 75, each of which legs comes into operative engagement with a tooth such as the respective teeth 76 and 77 of a ratchet 78.
  • ratchet 78 and the cam 67 may be molded from electrical insula tion material such as nylon and that they are appropriate ly mounted for rotation about a horizontal axis by suitable bracket means 80 mounted on the base of frame 58. Also, it will be understood that the actual number of ratchet teeth '76 and '77 is selected to establish the num ber of times which the diaphragm 54 must be extended and restored by rise and fall of the fluid pressure in the actuator body 51 to eiiect the transition from cam level 68 to level 68.1.
  • a start knob 83 may be mounted in an appropriate place on the cab inet structure 1 and connected to the escapement lever 72 by a Bowden wire or other flexible means 84, it being understood that said wire 84 is slideably housed within the usual flexible casing (not shown).
  • the knob 83 is biased toward the right of FIGURE 4 by means of a coil spring 85 interposed between the casing and an abutment 86 on the knob shaft 87. It will be apparent that pulling outwardly on knob 83 will rock the escapernent lever 72 upwardly against the bias of spring 81.
  • the escapement leg 74 is thus indexed to the next upper tooth oi the atchet and upon release of the knob 83 the spring 81 will rotate the escapement to index the ratchet and the cam to bring the cam follower 64 to the cam level "itl thus closing the contacts associated with the switch springs 62 and 63.
  • the washing and rinsing operations include two washing cycles and two rinsing cycles.
  • the last two operational cycles subject the dishes and other articles to a rinse by clear, hot water.
  • Such a cycle requires that there be four ratcheting operations to complete these four cycles.
  • the ratchet 78 will have a total of twelve teeth, six being required to index the cam from level 68 to level 68.1 and six to return the cam to level 68.
  • Each of said levels represents a deenergized condition of the dishwasher, as previously noted. Assuming that the dishwasher has never before been operated, in which event there would be no residual liquid within the pump 26 or the discharge pipe 28, the first operation of the machine will establish a cycle in which there would be two washes and three rinses.
  • the washing pump 20 and the discharge pump 26 are now operating because the motor is energized, but at this stage there is no appreciable load on the motor.
  • the pump eventually receives suflicient water to discharge through the hub 15 into the spray device 14- whereupon the washing operation begins.
  • This first water circulation washes the detergent out of the first cup of the Sharp et al. detergent dispenser, forming the washing solution, as set forth in the said Re-issue patent. In the fill and operation diagram of FIGURE 9, this first washing effect takes place at water level Ql.
  • the positive pressure condition is immediately relieved against the diaphragm 54 because the pump has immediately displaced the residual water.
  • Spring 81 returns the diaphragm to index the ratchet a second time. From then on the first wash will be represented by this second index of the ratchet; the second wash by the third index; and the two rinsing operations respectively by the fourth and fifth indexing.
  • the sixth and final indexing completes the first one-half revolution of the cam, whereupon level 68.1 lifts the cam follower to open the contacts 62 and 63 to terminate the washing and rinsing operations.
  • FIGURE 7 The circuit of FIGURE 7 is similar to that of FI 6 except that provisipns are made for an electrical start rather than the manual operation of the escapement mechanism previously noted.
  • the knob 83 and its associated mechanism have been eliminated in favor of a normally-open delayed action switch 94 which bypasses the contacts of leaf springs 62 and 63.
  • Switch 94 may occupy a position on the cabinet similar to that shown for the knob 83.
  • the switch is equipped with any conventional dash pot or other delay device 95. The dash pot maintains the switch closed for a length of time approximating the first washing operation.
  • the user depresses switch 94 to complete the energizing circuit from L1 through closed door switch 88, to conductor 90, solenoid coil 10.1, conductor 91, the closed contacts and 66, conductor 96, bypass conductor 97, switch 94 and conductor 98 to L2.
  • the pump motor circuit is completed from L1 through conductor 92, motor coil 30, conductors 93 and 97, closed switch 94 and conductor 98 to L2.
  • this operational circuit there has not yet been an operation of the ratchet in the first dishwasher operation so the contacts 62 and 63 remain open. However, the water inlet valve remains open, and the pump motor 30 remains energized because of the delayed restoration of the switch 94.
  • FIGURE 8 The circuit of FIGURE 8 is similar to that of FIG- URE 7 except that the contacts 65 and 66 have been eliminated, thus establishing an operational cycle in which the water inlet valve solenoid 10.1 remains energized concurrently with the energization of the motor coil 30. It is believed that the obviousness of the circuit makes it unnecessary to describe the operation in detail.
  • the flow capacity of the respective discharge piping systems connected to the discharge pump inlet should preferably be somewhat greater than the flow capacity of thedischarge piping on the downstream side of the pump 26, to insure the substantially immediate rise in discharge pressure to the certain level necessary for cocking the I ratchet.
  • This flow capacity differential is best accomplished by appropriately sizing the outlet piping relative to the inlet piping to the pump but if necessary or desirable, an orifice (not shown) or other flow limiting device may be installed immediately downstream of the actuator 50.
  • valve means for supplying said tub with washing liquid, a pump for withdrawing said liquid from said tub and returning it thereto for effecting the washing of said articles, a discharge pump for withdrawing said liquid from said tub and discharging it to the exterior, motor means for operating the respective pumps, electric means etiective when energized to open said valve means and effective when deeergized to close the same, and an electric circuit for energizing said motor means and said valve operating means; the combination comprising means for closing said circuit, means responsive to the attainment of a predetermined liquid level in said tub to eiiect flow of liquid therefrom to said discharge pump for substantially complete evacuation of liquid from said tub, and means effective upon totaling a predetermined number of times during which a certain fluid pressure exists in the discharge of said discharge pump to interrupt said electric circuit to stop operation of said motor means and deenergize said valve operating means.
  • valve means for supplying said tub with was ing liquid, means for circulating washing liquid among the articles in the tub for washing them, a discharge pump for withdrawing said liquid from said tub and discharging it to the exterior, motor means for operating the liquid circulation means and the discharge pump, electric means effective when energized to open said valve means and effective when deenergized to close the same, and an electric circuit for energizing said motor means and said valve operating means;
  • the combination comprising means for closing said circuit, means responsive to the attainment of a predetermined liquid level in said tu'o to eiiect flow of liquid therefrom to said discharge pump for substantially complete evacuation of liquid from said tub, and means eiiective upon totaling a predetermined nurnher of times during which a certain fluid pressure exists in the discharge of said discharge pump to interrupt said electric circuit to stop operation of said motor means and deenergize said valve operating means.
  • valve means for supplying said tub with washing liquid, means for subjecting said articles to sprays of said washing liquid for washing said articles, a discharge pump for withdrawing said liquid from said tub and discharging it to the exterior, motor means for operating said washing means and said discharge pump, electric means eitective when energized to open said valve means and effective when deenergized to close the same, and an electric circuit for conjointly energizing said motor means and said valve operating means; the combination comprising means for closing said circuit, means for accumulating liquid to a predetermined liquid level in said tub before permitting flow to said discharge pump for evacuation of liquid from said tub, and means downstream of said discharge pump and effective upon the existence of a certain fluid pressure in the discharge of said discharge pump to interrupt said electric circuit to stop operation of said motor means and deenergize said valve operating means.
  • Dishwashing apparatus comprising: a tub to contain dishes to be washed, a valve for introducing washing liquid thereinto, electromotor means efiective when energized to operate said valve to open position and when deenergized permitting said valve to assume a closed position, means including a liquid circulation mechanism for receiving liquid from said tub and returning it thereto to wash the dishes therein, means including a pump for evacuating liquid from said tub, a motor common to said circulation mechanism and said pump to operate the same, an electric circuit for energizing said valve operating means and said motor, a switch in said circuit, an actuator for operating said switch between open and closed positions, a cam operatively associated with said actuator and having a first level for operating said switch to open circuit position and a second level 'for operating said switch to closed circuit position, means for effecting a first rotation of said cam from its first level to its second level, means for rotating said cam in step-by-step fashion through its second level to its first level, means effective upon the accumulation of a predetermined amount of liquid in
  • 1% means responsive to certain fluid pressure conditions at the discharge of said pump to effect the step-by-step operation of said cam mechanism, whereupon after number of operations of said stepping mechanism suflicient to operate said cam through its said second level, said cam restores to its first level to deenergize said electric circuit.
  • Dishwashing apparatus comprising: a tub to contain dishes to be washed, a valve for introducing washing liqid thereinto, electromotor means eiiective when energized to operate said valve to open position and when deenergized permitting said valve to assume a closed position, means including a first pump for receiving liquid from said tub and returning it thereto to Wash the dishes therein, and a second pump for evacuating liquid from said tub, a motor common to said pumps to operate the same, an electric circuit for commonly energizing said valve operating means and said motor, a switch in said circuit, an actuator for operating said switch between open and closed positions, a cam operatively associated with said actuator and having a first level for operating said switch to open circuit position and a second level for operating said switch to closed circuit position, means for manually operating said cam from its first to its second levels to energize said pumps and operate said valve to admit washing liquid into said tub, means effective upon the accumulation of a predetermined amount of liquid in said tub to effect flow of liquid to said second pump
  • Dishwashing apparatus comprising: a tub to contain articles to be washed, a valve for introducing washing liquid into said tub, a solenoid effective when energized to operate said valve from a normally closed to an open position, a pump for discharging liquid from said tuh to a point of waste disposal, means for delaying flow of liquid from said tub to said pump until after a predetermined accumulation of liquid within said tub, a motor for driving said pump, an electric circuit including first and second switches in series for energizing said solenoid, an electric circuit including only said second switch for energizing said pump motor, means for initially completing each said circuit to respectively energize said solenoid and said motor, and pressure sensitive means in the discharge system of said pump to operate?
  • said means including structure eifective upon a certain increase in pump discharge pressure to open said first switch means and to prepare said second switch means for operation to open condition and eifective upon a subsequent drop in discharge pressure to return said first switch means to closed circuit condition while operating said second switch to open circuit position.
  • Dishwashing apparatus in which said means for initially completing said electric circuits include an electric circuit shunting out said first and second switches and a manually operable switch in said shunting circuit.
  • Dishwashing apparatus in which said manually operable switch has means effecting a return thereof to open circuit position after a predetermined time delay interval.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Reciprocating Pumps (AREA)
US145224A 1961-10-16 1961-10-16 Dishwashing apparatus Expired - Lifetime US3174489A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE623615D BE623615A (es) 1961-10-16
US145224A US3174489A (en) 1961-10-16 1961-10-16 Dishwashing apparatus
GB37589/62A GB1011877A (en) 1961-10-16 1962-10-04 Improvements in dishwashing apparatus
FR912376A FR1343772A (fr) 1961-10-16 1962-10-16 Machine à laver la vaisselle
CH1212762A CH395454A (de) 1961-10-16 1962-10-16 Geschirrwaschmaschine

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US3174489A true US3174489A (en) 1965-03-23

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BE (1) BE623615A (es)
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GB (1) GB1011877A (es)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3619592A (en) * 1970-03-09 1971-11-09 Tappan Co The Washing machine with illuminated interior
FR2411599A1 (fr) * 1977-12-14 1979-07-13 Gen Electric Porte-vaisselle pour machine a laver la vaisselle
EP0333251A2 (en) * 1988-03-18 1989-09-20 Unilever N.V. Improved overflow system
US5365969A (en) * 1994-01-21 1994-11-22 White Consolidated Industries, Inc. Float with skirt to prevent leakage due to oversudsing
US5868011A (en) * 1997-04-04 1999-02-09 General Electric Company Water traps for washing machines
EP2008569A1 (en) 2007-06-29 2008-12-31 Premark FEG L.L.C. Integrated suction and draining device for the tank of a dishwashing machine and dishwashing machine including such a device
US20090165820A1 (en) * 2006-01-13 2009-07-02 Ecolab Inc. Method of disposing of soiled liquid from a sump assembly for a re-circulating warewashing machine
US20100059086A1 (en) * 2006-11-30 2010-03-11 Premark Feg L.L.C. Drain system for a warewasher
CN103860122A (zh) * 2012-12-10 2014-06-18 坎迪公司 操作洗碗机的方法
US10123676B2 (en) 2014-10-10 2018-11-13 Illinois Tool Works Inc. Warewash machine with automated drain and fill

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES249755Y (es) * 1979-05-21 1981-01-01 Circuito perfeccionado de alimentacion de agua a maquinas lavadoras,principalmente lavavajillas
US7754025B1 (en) 2000-06-08 2010-07-13 Beverage Works, Inc. Dishwasher having a door supply housing which holds dish washing supply for multiple wash cycles
US7083071B1 (en) 2000-06-08 2006-08-01 Beverage Works, Inc. Drink supply canister for beverage dispensing apparatus

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2155868A (en) * 1934-11-08 1939-04-25 Pauly Remigius Dishwashing machine
US2353368A (en) * 1939-12-04 1944-07-11 Bendix Home Appliances Inc Cleaning machine
US2720564A (en) * 1952-07-14 1955-10-11 Soreng Products Corp Fluid pressure responsive switch
US2771894A (en) * 1955-11-29 1956-11-27 Gen Electric Control circuits for dishwashing apparatus
US2934618A (en) * 1955-07-11 1960-04-26 Controls Co Of America Fluid pressure responsive switch
US3072129A (en) * 1961-12-26 1963-01-08 Gen Electric Dishwashing apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2155868A (en) * 1934-11-08 1939-04-25 Pauly Remigius Dishwashing machine
US2353368A (en) * 1939-12-04 1944-07-11 Bendix Home Appliances Inc Cleaning machine
US2720564A (en) * 1952-07-14 1955-10-11 Soreng Products Corp Fluid pressure responsive switch
US2934618A (en) * 1955-07-11 1960-04-26 Controls Co Of America Fluid pressure responsive switch
US2771894A (en) * 1955-11-29 1956-11-27 Gen Electric Control circuits for dishwashing apparatus
US3072129A (en) * 1961-12-26 1963-01-08 Gen Electric Dishwashing apparatus

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3619592A (en) * 1970-03-09 1971-11-09 Tappan Co The Washing machine with illuminated interior
FR2411599A1 (fr) * 1977-12-14 1979-07-13 Gen Electric Porte-vaisselle pour machine a laver la vaisselle
US4183437A (en) * 1977-12-14 1980-01-15 General Electric Company Rack holder arrangement for dishware
EP0333251A2 (en) * 1988-03-18 1989-09-20 Unilever N.V. Improved overflow system
EP0333251A3 (en) * 1988-03-18 1990-01-10 Unilever Nv Improved overflow system
US5365969A (en) * 1994-01-21 1994-11-22 White Consolidated Industries, Inc. Float with skirt to prevent leakage due to oversudsing
US5868011A (en) * 1997-04-04 1999-02-09 General Electric Company Water traps for washing machines
US20090165820A1 (en) * 2006-01-13 2009-07-02 Ecolab Inc. Method of disposing of soiled liquid from a sump assembly for a re-circulating warewashing machine
US20100059086A1 (en) * 2006-11-30 2010-03-11 Premark Feg L.L.C. Drain system for a warewasher
US8252121B2 (en) 2006-11-30 2012-08-28 Premark Feg L.L.C. Drain system for a warewasher
EP2008569A1 (en) 2007-06-29 2008-12-31 Premark FEG L.L.C. Integrated suction and draining device for the tank of a dishwashing machine and dishwashing machine including such a device
US20090001006A1 (en) * 2007-06-29 2009-01-01 Gianluca Pardini Integrated suction and draining device for the tank of a dishwashing machine and dishwashing machine including such a device
AU2008202855B2 (en) * 2007-06-29 2009-12-17 Premark Feg L.L.C. Integrated suction and draining device for the tank of a dishwashing machine and dishwashing machine including such a device
CN103860122A (zh) * 2012-12-10 2014-06-18 坎迪公司 操作洗碗机的方法
US10123676B2 (en) 2014-10-10 2018-11-13 Illinois Tool Works Inc. Warewash machine with automated drain and fill

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BE623615A (es)
GB1011877A (en) 1965-12-01
CH395454A (de) 1965-07-15

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