US2824567A - Dishwashing machine - Google Patents

Dishwashing machine Download PDF

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Publication number
US2824567A
US2824567A US321692A US32169252A US2824567A US 2824567 A US2824567 A US 2824567A US 321692 A US321692 A US 321692A US 32169252 A US32169252 A US 32169252A US 2824567 A US2824567 A US 2824567A
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Prior art keywords
cabinet
liquid
casing
water
closure
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US321692A
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Karlstrom Johan Fredrik Robert
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ELEKTROIUX AB
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ELEKTROIUX AB
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    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00Washing or rinsing machines for crockery or tableware
    • A47L15/14Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber
    • A47L15/18Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with movably-mounted spraying devices
    • A47L15/22Rotary spraying devices
    • A47L15/23Rotary spraying devices moved by means of the sprays
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/3149Back flow prevention by vacuum breaking [e.g., anti-siphon devices]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/4456With liquid valves or liquid trap seals

Definitions

  • This invention relates to dishwashing machines having a cabinet in which dishes and the like are cleansed by complished by providing a cabinet having' an access opening in a wall thereof adapted to be closed by a hinged closure or door which is movable outwardly from and toward its closed position and by itself will remain in any desired open position to which it has been moved when the closure or door is released.
  • the closure or door does not need to be moved to a position to remain open in which a part thereof projects above the top of the cabinet, so that a dishwashing machine of the invention of a given capacity will require an installation space of minimum height.
  • the dishwashing machine may be installed on a wall at eye-level height beneath kitchen cabinets and other projecting structures by reason of the fact that the hinged door or closure can be swung upwardly fromits closed position to a horizontal position and will automatically remain in such horizontal position the instant it is released.
  • the top peripheral edge portion of the door or closure is hinged to the front wall of the cabinet at a region below the extreme top edge thereof, the hinge embodying provisions to permit relatively free opening movement being imparted tothe door and capable of imparting a braking action to hold the door in its open position and prevent free movement thereof toward its closed position when released.
  • the front wall of the cabinet desirably slopes rearwardly from the bottom to the top thereof, and, since the door or closure is hinged to the front wall at the upper part thereof, the overall distance taken up by the depth of the cabinet and door in its horizontal open position accordingly will be at a minimum for a machine of a given capacity.
  • the bottom of the cabinet slopes downwardly from the front Wall to the rear wall thereof so that, while the front wall slopes rearwardly in the manner described, a maximum amount of space is provided at the bottom of the cabinet for housing parts of the dishwashing machine.
  • a suitable trough may be provided at the exterior face of the front wall of the cabinet to catch and collect water that drips from the door or closure when it is moved from its closed position to gain access into the interior of the cabinet.
  • Such trough desirably is located at the bottom peripheral edge of the access opening and in communication with the interior of the cabinet in such a way that water readily passes into the cabinet while water splashing therein during operation of the machine cannot readily ow inthe opposite direction.
  • a combination vacuum breaker and water seal is provided at a side wall ofthe 'ice cabinet.
  • the vacuum breaker is connected in the water supply line for conducting water to the dishwashing machine, such vacuum breaker providing a space at atmospheric pressure in the supply line which is in communication with the interior of the cabinet for conducting to the latter water dripping in the space.
  • the water seal is formed by such dripping liquid to segregate air in the cabinet from the space in the vacuum breaker which is at atmospheric pressure.
  • the spraying devices in the preferred embodiment ofv the invention include nozzles for discharging liquid jets therefrom, the nozzles being caused to rotate in one direction by the reaction force developed by the jets.
  • rotatable jet dehecting members are provided which are rotatable in the opposite direction by the impact force of the jets on the members.
  • the jet deflecting members are formed with grooves to deflect the jets in a multiplicity of different directions toward the dishes to be washed in the cabinet.
  • parts associated with the nozzles are brought into frictional engagement with parts associated with the rotatable jet deecting members responsive to the water pressure in the spraying devices, thereby imposing a braking action on-the rotatable nozzles to reduce the speed which vthey otherwise attain by the reaction force devel-l oped by the jets.- r n,
  • Fig. 1 is a side elevation of a dishwashing machine embodying my invention which is mounted on a wall at eye-level;
  • v l Y Fig. 2 is an enlarged vertical sectional ⁇ view taken at line 2-2 of Fig. 3 illustrating the apparatus more clearly;
  • Fig. 3 is a horizontal sectional view taken at line 3-.3 of Fig. 2; n
  • Fig. 4 is a front elevation of the apparatus of Figs. 1, 2 and 3, the front closure or door being open to illustrate details;
  • Fig. 5 is a fragmentary sectional view taken at line 5 5 of Fig. 3; i
  • Fig. 6 is a fragmentary sectional view taken at line 6 6 of Fig. 2 v
  • Fig. 7 is an enlarged vertical sectional view of the front closure or door and parts of the machine at the vicinity of the access opening;
  • Fig. 8 is a fragmentary horizontal sectional view taken at line 8-8 of Fig. 7; l
  • Fig. 9 is a fragmentary front view of the apparatus illustrating the front closure in its closed position
  • Figs. 10 vand 11 are fragmentary sectional views taken at lines 10-10 of Fig. l1 and 11--11 of Fig. 10, respectively, illustrating more clearly details of the locking mechanism for the front closure of the machine;
  • Fig. 12 is a sectional view takenat line 12-12 o Fig. 5; v Y
  • Fig. 13 is an enlarged vertical sectional view of the receptacle shown in Fig. 3 adapted to yhold a suitable washing agent; l., V
  • Figs. 16 to 19 are sectional views of details of the machine, Fig. 16 being taken at lines 16-16 of Figs. 18 and 19, Fig. 17 being taken at line 17--17 of Fig. 16, Fig. 18 being taken at line V18-18 of Figs. 16 land ⁇ 19 and Fig. 19 being taken at line 19-19 of Fig.V ⁇ 18;
  • Fig. 20 is a fragmentary. sectional, View ,Ot .details of the machine.
  • Fig. 21 is a sectional view taken at line 21-21 of Fig. 20.
  • the casing 10 provides a housing having a top 12, side walls 14, bottom 15, rear wall 16 and front wall 17 having an access opening 18 adapted to be closed by a front closure or door 19 hinged at 20 to the front wall.
  • the body portion of the casing 10 desirably is formed from a single stamping bent to provide a hollow rectangular section which delines the top 12, side walls 14 and a major part of the bottom 15.
  • the bottom is arranged to slope downwardly from the front to the rear of the apparatus, as best seen in Fig. 2, to promote rapid draining of water in a manner to be explained presently.
  • the hollow rectangular section of the casing 10 is formed at the front and rear edges 21 and 22 to receive front and rear plates, respectively, the front plate being shaped to provide the front wall 17 and forward part of the bottom 15 while the rear plate defines the rear wall 16 of the casing.
  • the upper part of the plate forming the rear wall 16 of the casing 10 desirably is formed with outwardly projecting regions 23, as best seen in Fig. 2, which are adapted to bear against the wall upon which the dishwashing apparatus is mounted.
  • the regions 23 of the rear wall 16 may be formed with openings or slots of key-hole shape, not shown, to receive the ends of hooks or other suitable supports fixed to the wall.
  • V connected to the opposing ends thereof.
  • each spraying device at the vicinity of the bottom 15 comprises a rotatable nozzle 24 having a plurality of discharge openings, such nozzles being effective to rotate responsive to supply of liquid thereto under pressure.
  • Each spraying device also embodies a rotatable member having radially extending arms 25 for changing the direction of the jets discharged from the openings of nozzle 24 and directing liquid in a multiplicity of directions toward the dishes to be washed.
  • the positions the spraying devices assume below the top 12 and above the bottom 15 of the casing are best shown in Figs. 6 and 5, respectively.
  • a liquid distributor 26 for regulating the supply of liquid to the spraying devices.
  • the liquid distributor 26, which is driven by a motor 27, is also provided with suitable control valve 28 for shutting olf the supply of liquid to all of the spraying devices, aswill be described more fully hereinafter.
  • a pair of dish racks 29 and 30 are positioned alongside each other in the bottom part of casing 10 above the bottom spraying devices.
  • the front and rear plates of the easing may be provided with suitable tabs, like the tab 31 seen in Fig. 2, for example, to hold the racks 29 and 30 in position and permit easyremoval of the racks from the interior of the casing 10.
  • A'support 32 formed of wire is fixed to the rear wall 16 to facilitate positioning of dishes on the rack 29.
  • a small perforated basket 33 adapted to lhold small articles, such as knives, forks and spoons,'for example, is re-A movably mounted in any suitable manner at' the -rear wall 16 of the casing.
  • a receptacle 34 which is mounted on the front plate 17 in any suitable manner.
  • the hinges 20 are located at the front wa1l 17 at the upper part of the access opening 18 and are of such construction that the closure or door 19 can be raised to any position desired and by itself will remain at such position when released. As best seen in Figs.
  • each hinge 20 comprises a U-shaped stationary part 35 which is secured at 36, at the closed end thereof, to the front wall 17, and a cooperating movable part or strap 37 which is fixed at 38 to the door 19.
  • the upper part 39 of strap 37 which is of cylindrical shape and hollow, snugly fits between the spaced apart sides of stationary part 35.
  • the pivotal connection between parts 37 and 35 is formed by a bolt or pin 40 and nuts 41 threadedly
  • the nuts 4l are of the shape shown in Fig. 8 and formed with inwardly extending hollow sleeves 42 which pass through openings in the side walls of U-shaped part 35 and are internally threaded to receive the threaded end portions of pin 40.
  • a hollow tubular member 43 is held in the cylindrical part 39 of strap 37 about the inwardly extending sleeves 42 of the tightening nuts 41.
  • the tubular member 43 may be referred to as a friction tube and desirably is formed of a suitable material like plastic, for example.
  • a tightly wound coil spring 44 is provided about the friction tube 43 and lengthwise thereof.
  • the spring 44 is of helical form, and, while the wire forming such spring is shown in Fig. 8 as being circular in cross-section to facilitate illustration thereof, in practice it has been found advantageous to employ wire essentially rectangular in cross-section to form the spring 44.
  • One end of the coil spring 44 which may be referred to as a tightening spring, is freely disposed about the friction tube 43, while the other end 45 thereof extends into an opening formed in cylindrical part 39 of movable strap 37 and is connected to the latter, as shown in Fig. 7.
  • a spring washer 46 is provided between one tightening nut 41 and a side wall of the hinge part 3S.
  • the tightening springs 44 in the hinges 20 are disposed about the friction tubes 43 in such a manner that, when the front closure 19 is moved upwardly from the closed position shown in Fig. 7, the inner diameter of each tightening spring 44 is increased and friction between the springs 44 and tubes 43 about which the springs are disposed, is eliminated. Accordingly, the front closure or door 19 can be moved upwardly to any open position desired without developing any friction between the springs 44 and friction tubes 43 which would tend to retard or resist opening movement being imparted to the front closure 19.
  • friction tubes 43 also will hold and support the closure in its open position by reason of the friction developed between the ends of the friction tubes and the spaced apart sides of the U-shaped hinge parts 35.
  • the coil springs 44 are turned or rotated because the coil ends 45 are fixed to straps 37, Since the coil springs 44 are contracted and tightly hug the friction tubes 43, the latter are also turned and moved in the same direction as the springs 44 when the closure 19 is being moved to its closed position. Under such'conditions the friction developed between the ends of the friction tubes 43 and spaced apart sides of U-shaped parts 35 essentially balance the weight of the closure 19, such friction being overcome by the manual etort required to move the closure to its closed position.
  • the door 19 slopes rearwardly from the vertical so that the depth of the casing is somewhat smaller at the top 12 than at the bottom 15.
  • the door 19 comprises a frame 47 having a transparent window 48 mounted thereon with the aid of a rubber gasket 49.
  • a sealing gasket 50 which may be formed of resilient material like rubber, for example, which snugly tits about the access opening 18 when the door 19 is moved to its closed position.
  • a trough 51 is provided at the outside of the access opening 18 at the bottom peripheral edge portion thereof.
  • the trough 51 is formed with a series of openings 52 to allow water to pass and drain into the inten'or of the casing, such openings being shielded to prevent water in the interior of the casing from owing into the trough.
  • a freely swingable water collecting member 53 which acts to direct liquid therefrom into the interior of cabinet or casing 10 or into trough 51 when the door 19 is moved outwardly from its closed position.
  • the member 53 essentially constitutes a liquid collecting trough which may be formed from a metal stamping having upwardly bent tabs 54 whose upper ends are pivotally .mounted on a pin 55 fixed to the inside face of the door 19 in any suitable manner. ⁇ nearer to the door 19 is bent to hold a weight 56 in order ito balance the trough 51, so that it will assume the cori rect position and function properly to direct liquid collected thereon into the interior of the casing 10 and into The edge of member 53 apart upright walls 78 of a U-shaped bracket fixed to the top of the housing 62. In th'e closed position of the door 19 in Fig.
  • the locking plate 77 acts against the locking roller 74 to keep the slide 70 in the position shown against'the upward biasing action of spring 72.
  • the hook 69 occupies a position in the arcuate-shaped groove 65 which permits the rod or sternl 59 to be turned with the raid of knob 60, so that control valve 28 will be rendered operable to allow washing liquid to be supplied to the spraying devices.
  • a casing 80 is mounted at the underside of the casing 10, as shown in Figs. 4 and 5.
  • the casings 10 and 80 together provide a space in which is disposed a common valve housing 81 for a pair of valve members 82 and 83.
  • the valve member 83 which is fixed to and movable with a vertical shaft 84, serves as a part of the liquid distributor 26 to cause washing liquid to be delivered intermittently to the spraying devices through passages 85, 86, 87 and 88 of housing 81, as shown in Fig. 17.
  • the valve member trough 51 when the door 19 is raised from its closed position with the aid of a handle 57 fixed thereto at 58.
  • control valve 28 for controlling the supply of washing liquid to the spraying devices in the cabinet 10 is provided with an elongated rod or stem 59 which extends to the front wall 17 and is operable at the front of the machine by a control knob 60.
  • a suitable lock 61 is provided at the vicinity of the door 19 which is operatively associated with the rod or stem 59 and makes it necessary to turn the knob 60 and move the control valve 28 to its closed position to shut off the supply of liquid to the spraying devices before the door 19 can be opened.
  • the lock 61 cornprises a vertically extending housing 62 which is fixed at 63 to the front wall 17 of the casing.
  • a longer side wall of housing 62 is formed with an opening to receive a reduced forward section 59a of the rod 59 upon which is secured a disk 64 having arcuate-shaped grooves or slots 65 and 66 and a radially extending groove 67 communieating with an end of groove 65 and extending to the outer periphery of disk 64.
  • the groove 66 receives a bent hook 68 formed at the extreme lower end of the longer side wall of the housing 62.
  • the groove 65 receives the lower hooked end 69 of a slide 70 which is vertically movable along the inside face of the longer side wall of the housing 62, such slide having a bent end or tab 71 intermediate the ends thereof.
  • a coil spring 72 is held under compression within the housing 62 between the tab 71 and a roller 73 which acts and bears against the periphery of disk 64. Hence, the spring 72 is constantly acting to urge the slide 70 upwardly, the slide having a section 70a projecting upwardly above the housing 62 to which a locking roller 74 is fixed at the upper end thereof.
  • the slide 70 is guided Within housing 62 by a guide roller 75, and the action of the compression spring 72 causes the locking roller 74 to act and bear against the underside of a curved section 76 of a locking plate 77 projecting inwardly from the door 19 and xed thereto at 58.
  • the locking plate 77 When the door 19 is in the closed position shown in IFig. 7,- the locking plate 77 is disposed between spaced 82, which controls the supply of washing liquid to all of the spraying devices and forms a part of control valve 28, is disposed in the upper part of housing 81 and rotatable therein.
  • the valve member 82 is connected to an inner section of the rod or stem 59, such inner section being joined to the outer or forward section thereof by a sleeve or coupling 89, as shown in Figs. 2 and 5.
  • Washing liquid is supplied to the valve housing 81 through a liquid supply line 90, as shown in Fig. 4.
  • a flexible connection 91 such as a rubber hose, for example, may be connected to supply line to deliver washing water thereto from a water tap having a mixing unit for mixing the desired quantities of hot and cold water.
  • the supply line 90 is provided with a connecting bend 92 which communicates with a conduit section 93 connected to the inlet 94 of the valve housing 81, as shown in Figs. 4 and 5.
  • valve member 82 When the valve member 82 is in the closed position illustrated in Fig. 5, the supply of washing liquid to the machine is shut oi and no washing liquid is delivered to the spraying devices. However, when the valve member 82 is in the open position illustrated in Figs. 16 and 18, Washing liquid can ow through the housing 81 into a chamber 95 immediately above the valve member 83.
  • valve member 83 is xed to a vertical shaft 84 journaled in the housing 81.
  • gear 96 To the lower end of shaft 84 is tixed a gear 96 which engages a worm 97 xed to the shaft 98 of the motor 27, as best shown in Figs. 5 and 12.
  • the shaft 84 When the motor 27 is energized, the shaft 84 is driven at a relatively slow speed by reason of the speed reduction eifected by the worm 97 and gear 96.
  • the valve member or'distributor 83 is also driven at a relatively low speed so that an opening 99 in the wall thereof successively establishes communication between the chamber 95 and the passages 85, 86, 87 and 88, respectively, as shown in Figs. 17 and 19.
  • the hollow valve member or distributor 83 which is of cylindrical form, is formed with two openings or recesses 100 and 101 in the outer wall surface thereof which are in communication with the interior of the distributor.
  • the openings 100 and 101 are at levels above and below the passages 85, 86, 87 and 88 and liquid can pass into and overcoming the oblique Aloads Ato which the valve ⁇ 7 member or distributor 83 may be subjected by the pressure of the washing liquid entering chamber 95 in the housing 81.
  • the receptacle 34 for Washing agent comprises a cylindrical casing 102 and a bottom part 103 fixed thereto. Washing agent may be poured into the casing 102 throughan opening 104 adapted to be closed by a cover 105 which is connected by a flexible chain 106 to the casing.
  • a pair of hollow tubes 107 and 108 extend upwardly within the casing 102 for circulating washing liquid therethrough. As shown in Figs. 13 and 18, washing liquid supplied to the inlet 94 of housing 81 llows therefrom through a passage 109 to which is connected one end of a conduit 110, the other end of which is connected to the lower end of tube 107.
  • the washing liquid passes through elongated slots 114 in the sleeve 111 and screening 115 which is of cylindrical form and disposed about the sleeve.
  • the washing liquid flows through a conduit 116, one end of which communicates with the space about the screening 115 and the other end of which is connected to a passage communicating with a chamber 117 in the valve housing 81.
  • the ilow of washing liquid from chamber 117 in Fig. 18 to the chamber or space 95 above the valve member or distributor 83 is controlled by valve member 82 in a manner which will be described hereinafter.
  • the electric motor 27 is connected to a source of electrical supply with the aid of a circuit which includes a terminal board 118, conductors connected to such terminal board and the motor 27, and a control switch 119 connected in the circuit.
  • the switch 119 includes a pivotally mounted lever or arm 120 arranged to be acted upon by a pin 121 of a pressure operated control device 122.
  • the control device comprises a casing having the interior thereof divided into top and bottom spaces by a diaphragm 123.
  • the top space is connected by a hollow tube 124 to a passage 125 in valve housing 81, as shown collectively in Figs. V and 12. In this way the diaphragm 123 in control device 122 will be subjected to the pressure of washing liquid when valve member 82 is open and such liquid can flow to the liquid distributor 26.
  • the upper end of pin 121 is connected to the diaphragm 123 which is biased upwardly by a suitable spring, not shown, provided in the bottom space of control device 122.
  • a suitable spring not shown, provided in the bottom space of control device 122.
  • the compression of the spring just mentioned is such that, when the valve member 82 is closed and the passage 125 is not subjected to pressure of washing liquid, the spring effectively causes the diaphragm 123 to move upwardly and raise pin 121 to its upper position, thereby rendering switch 119 ineffective to complete the circuit for the motor 27.
  • valve member 82 When the valve member 82 is open and washing liquid pressure is transmitted through tube 124 to the space above the diaphragm 123, the latter will be moved downwardly against the action of the spring in the bottom space of the control device 122, thereby rendering pin 121 operable to move lever 120 to close the switch 119 and complete the circuit for the motor 27.
  • leakage occurs at the diaphragm 123 which allows washing liquid to reach the bottom space of the control device 122, such liquid tlowing into the bottom space is conducted therefrom to waste through a suitable connection 126.
  • a vacuum breaker 127 is provided in the washing liquid supply line 90 at one of the side walls 14 at the rear thereof.
  • the llexible connection 91 is connected to the lower end of a vertically extending section of the supply line 90, the upper end of which is connected to the inlet 128 ⁇ of the vacuum breaker 127.
  • the outlet 129 of the vacuum breaker is connected to another section of the supply line which extends downwardly at the side wall 14 of the casing 10 and then extends beneath the bottom 15 thereof to the connecting bend 92.
  • the vacuum breaker 127 comprises a housing or shell 130 within which are disposed nozzles 131 and 132 having an air gap 133 therebetween. Immediately above the air gap 133 the shell 130 is formed with openings 134 to provide a vent to atmosphere. ln operation, washing liquid under pressure flows through one section of the supply line 90 to the inlet 128 with which the nozzle 131 is in communication. The liquid discharged from the orifice of nozzle 131 in the form of a narrow stream or jet enters the nozzle 132 to which the outlet 129 is connected. The liquid passing through the air gap 133 will be at atmospheric pressure, and, after reaching the outlet 129, continues in its path of flow through the supply line 90 to the control valve 28, as previously described.
  • the lower open end of the shell 130 which is in the form of a tear drop as seen in Fig. 20, is connected to an opening 135 in the side wall 14 of casing 10. Such connection desirably is made fluid tight with the aid of nipple 136.
  • Another housing is formed at the inner face of the side wall 14 at the vicinity of opening 135 by a semicircular plate 137 and a U-shaped trough 138 into which the bottom edge portion of plate 137 extends, as shown in Figs. 2 and 20.
  • the plate 137 is secured to the side wall 14 to provide a space which is sealed ofi from the air within casing 10 when the trough 138 is filled with liquid.
  • the trough will always be full of liquid due to leakage at the orifices of the nozzles 131 and 132, such liquid overflowing, of course, from the trough into the interior of the casing 10.
  • a funnel-shaped member 140 is supported by bolts 141 at the underside of casing 10, the wider top opening thereof being spaced from and in alignment with the pipe section 139 while the narrower bottom opening is connected to a conduit 142 for discharging the washing liquid to waste, such as the sink indicated in dotted lines in Fig. 1.
  • a pair of rotatable spraying devices can be seen at the underside of the apertured dish racks 29 and 30. Another pair of such spraying devices are located beneath the roof or top 12 of the casing 10. One of the spraying devices at the bottom 15 of the casing is shown in Fig. 5, and one of the spraying devices at the roof 12 is shown in Fig. 6. The spraying devices at the top and bottom of the casing generally are the same and the slight differences between them will be pointed out presently.
  • Each of the spraying devices comprises ⁇ a hollow body member 145 secured to the top 12 or bottom 15 by a flanged collar 146.
  • the collars 146 are formed with outer anges which overlie the peripheral edge portions of apertures formed in the top 12 and bottom 15, respectively.
  • the body members 145 are formed with shoulders to receive the inwardly extending flanges of the collars 146, the neck portions 147 of the body members being threaded t9 receive tightening .caps 14,8 which l from the top 12.
  • Each body member 145 is formed with -a sleeveor part 150 of reduced cross section which projects toward the center region of the casing 10.
  • To the extreme outer ends ofthe sleeves 150 are fixed stationary plates 154 of annular form which are apertured to hold ball bearings 155 in recesses provided at the inwardly extending faces of the rotatable hub members 151.
  • Discs 156 are fixed ⁇ to and turnable with rotatable nozzle heads 157,.each of which is provided with a pair of the nozzl ⁇ es 24.
  • The'nozzle heads 157 each include ka hollow stem 158 having a nipple part '159 fixed to one end by an apertured locking nut 160.
  • the stem 158 which is located in the hollow interior or'centr'al passage 161 of the body member 145, is journaled at one end by Va neckv portion 162 of the nipple part 159 and 'at the opposite end by a cylindrical member163; As seen in Figs. 5 and 6, the nozzles v24 are fixed to the nipple parts 159 and receive liquid through channels in such parts and neck portions 162 from the passages 161 of the body members 145.
  • each body member 145 is formed with a liquid VVinlet 165 for introducing liquid intothe central passage 161.
  • the arms 25 of arcuate shape are carried by the hub members 151 and extend radially outward therefrom.
  • the jet heads4 157 are adapted to be ⁇ rotated. in one direction by the reaction force developed bythe liquid jets discharged from the nozzles 24..
  • Therliquid jets are discharged Yessentially in a horizontal direction from the nozzles 24.
  • the arms 25 are positioned to ismepinged by the liquid jetsl dischargedv from ⁇ the nozzles 24the arms accordingly being rotated in the opposite direction of the, jet heads 157 ,by theimpact force of the jets acting thereon.
  • the arms 25 may be referred to as liquid diverters for di- 50 156 in good frictional engagement with the balls 155k recting liquid inra multiplicity of diections toward the" dishes vadapted to be washed in the casing 10.
  • each of the arms 25 is formed with a series of serra tions or grooves diagrammatically indicated at 167 in Fig. 3 to change the direction of the jets in a multiplicity of different directions depending upon the angular extent of curvature of the individual grooves.
  • the outer peripheralnextremity of -certain grooves extend in' a vertical'direction a greater distance than other grooves, thus producing spaced apart peak points and valleys therebetween.
  • each spraying device is connecte-fl to one' of the passages 85, 86, 87 and 88 of the liquid ⁇ distributor 26.
  • pipes 170' an-d 171 connectthe passages 85 and 88 to the inlets; 165 of the sprayingdeviees at the vbottom of the casing 10.
  • pipe 172 connects the passage 86 and the inlet of the top spraying device at the left-hand side ofthe casing 10; and pipe 173 connects the passage 87 and the top. spraying device at the right-hand side of the casing 10.
  • Each of the hub members 151 is formed with a pulley Vportion to receive a belt 174, as shown in Figs. 5A
  • the. liquid distributor 26 operates to supply liquid intermittently to the spraying devices.
  • the belt 174 enables the active spraying devicev to drive the inactive spraying device which becomes a driven rotatable unitr and effective to promote a braking action on the hub member 151 and arms 25 of the active In this way the washing and rinsingY spraying device. action of liquid is improved in the manner explained in my application Serial No. 188,317, filed October 4, 1950,
  • Patent No. 2,596,693 granted May 13, 1952; and, if desired, reference may .be had thereto for a detailed description ofthe advantages derived from the braking action just described to cause the liquid jets to issue from the arms 25 in a great number of directions and be effective in a wide field of action.
  • dish racks 29 and 30 are removably supported within the casing alongside each other.
  • the small perforated basket 33 which is removably supported at the rear wall 16 at the left-hand side of the casing, is formed with dividing walls 180, as shown in Fig. 3.
  • the dish rack 30 in its entirety and the forepart of the dish rack 29 are of mesh form, as best seen in Figs. 2 and 3, to provide apertured supporting areas for cups, glasses and similar articles.
  • the rear part of the dish rack 29 comprises widely separated slats 181 parallel to the side walls 14 of the casing 10 and a number of spaced apart Hat members 182 relatively close to one another and parallel to the front and rear walls 17 and 16, respectively, of the casing.
  • the slats 181 are vertically disposed, the forward sections thereof forming a support for the mesh area of the dish rack 29 and the rear sections thereof being notched to receive the at members 182 which are also vertically disposed.
  • the flat members 182 desirably may be stamped from sheet metal to provide metallic strips which include vertical sections 183 alternating with sloping sections 184 to provide a notched dish rack of the character shown in Figs. 3 and 4, the bottom ends of the vertical and sloping sections meeting at acute angles having the apices thereof along a horizontally extending plane which slopes downwardly from point 185 to point 186 at the rear wall 16 of the casing, as indicated in Fig. 2.
  • Fig. 2 As best seen in Fig.
  • the notches of adjacent at members 182 are in alignment from the forward part to the rear part of the casing 10, thus providing grooved regions having apices which receive the bottom peripheral edge portions of plates, platters, saucers, bowls and similar objects having flanged outer sections. In this way all of such dishes have their bottom peripheral edge portions in essentially the same horizontally extending plane at a region relatively near to the spraying devices, so that the dishes will be impinged by jets of water having a relatively high impact force.
  • the mesh portion of the dish rack 29 is at a level essentially the same as the top edge of the foremost front flat member 182, thereby providing an arrangement to utilize the space in front of the at members 182 most electively for storing smaller articles ahead of the platters and plates placed on the at members 182.
  • each turn of the coil 32 includes a front part 189 which is essentially vertical or upright and a rear part 190 which is inclined to the vertical, so that the pitch of the coil, which is determined by the axial advance of each turn, is dependent upon the inclination of the rear parts 190 to the vertical.
  • the provision of the coil 32 facilitates supporting plates and platters and the like so that the rear peripheral edge portions bear against the rear wall 16, as indicated in Fig. 2, such rear support being elective irrespective of the size of the plates and being aided, of course, by proper spacing of the front straight portions 189 which act to hold the plates in a vertical or upright position.
  • valve member 82 of control valve 28 moves from its closed to its open position and thus allows water to reach the chamber of the liquid distributor 26, as shown in Fig. 5.
  • valve member 82 When the control knob 60 is rotated further in a counter-clockwise direction, the valve member 82 is turned an adequate distance in a counter-clockwise direction in Fig. 18 to allow water containing washing agent to flow from chamber 117 into chamber 95, such water also being distributed by the liquid distributor 26 to the several spraying devices. After an adequate amount of water containing washing agent is supplied to the spraying devices, the control knob 60 is then turned in a clockwise direction to rotate valve member 82 to the position shown in Figs. 16 and 18 to allow water to be supplied directly from the source of supply to the spraying devices.
  • the knob 60 is then turned clockwise to shift the stem or rod 59 to such a position that hook 69 of slide 70 moves into the radially'extending groove 67, whereupon the closure 19 can be opened and the slide 70 will automatically move upward so that hook 69 will assume the solid line position in Fig. ll and prevent turning of knob 60 while the closure 19 remains open.
  • the valve member 82 of the control valve 28 moves to its closed position to shut ol the supply of water to the'spraying devices.
  • the control device 122 in Fig. l2 is no longer subjected to line pressure ofwater and theswitch 119 opens to disconnect the motor 27 from the source of electrical supply, thereby stopping rotation o f valve member 83 in the liquid distributor 26.
  • the exible conduit 91 is connected to the source of supply of water, such as a water tap, having a mixing valve providing a suitable mixture of hot and cold water.
  • a suitable solenoid operated valve (not shown) may be connected in the supply line 90 ahead of the inlet connection 1.28 shown in Fig. 2l which is normally closed 13 and will open automatically when the door 19 is in its closed position and the knob 60 has been turned to move valve member 82 to its open position.
  • the provision of the vacuum break 127 in the supply line 90 is such that no additional space in a vertical direction is required even when this protective feature is incorporated in the dishwashing machine, as shown in Fig. 4.
  • a dishwashing machine a cabinet, means for supporting dishes and other articles to be washed in said cabinet, spraying means in said cabinet for directing water in a multiplicity of directions toward the dishes, ,said cabinet having an access opening, a closure member for the access opening, hinge structure for pivotally mounting said closure member on said cabinet about a horizontal axis between a closed position and a number of different open positions including a first open position in which no part of said closure member appreciably extends above the top of said cabinet, said hinge structure including means for freely moving said closure member manually upward against the force of gravity from its closed position to the different open positions including the first open position, and braking means embodied in said hinge structure for holding said closure member against the force of gravity when the latter is released after being moved to any one of the different open positions.
  • said hinge structure comprises a hinge including two relatively movable parts, said braking means being embodied in said hinge and including a coil spring having one end thereof xed to one of said parts and the opposite end thereof adapted to frictionally engage said other part.
  • said dishwashing machine set forth in claim 1 in which said cabinet is adapted to be mounted on a wall and formed with the access opening at a front wall thereof, said hinge structure for pivotally mounting said closure member comprising a hinge xed to the top edge portion thereof and to said cabinet, the front wall of said cabinet sloping rearwardly in an upward direction with the top part thereof nearer to the rear wall of the cabinet than the bottom part thereof.
  • a dishwashing machine a cabinet, means for supporting dishes and other articles to be washed in said cabinet, spraying means in said cabinet for directing water in a multiplicity of directions toward the dishes, said cabinet having an access opening, a closure member for the access opening, hinge structure for pivotally mounting said closure member on said cabinet for movement about a horizontal axis between a closed position in which said closure member depends from said axis 14 and a number of different open positions'including a first open position in which the bottom of said closure member is substantially at or in the vicinity of a horizontal plane passing through said axis to gain access into said cabinet through the opening therein without the need for moving said closure member to a position in which a part thereof appreciably extends above the top of said cabinet, said hinge structure including means for freely moving said closure member manuallyA upward against the force of gravity from its ⁇ closed position to the different open positions including the irst open position, and braking means embodied in said hinge structure for holding said closure member against the force of gravity when the latter is released after being moved to
  • a dishwashing machine a cabinet, means for supporting dishes and other articles to be washed in said cabinet, spraying means in said cabinet for directing water in a multiplicity of directions toward the dishes, said cabinet having an access opening, a closure member pivotally mounted on said cabinet for closing the opening, conduit means for conducting water from a source ⁇ of supply to said spraying means, a valve in said conduit means, a rotatable stem or spindle for operating said valve, a grooved disc fixed to said spindle and turnable therewith, locking provisions for said closure member including a rst part fixed to the latter and a second part coacting with the grooved disc, said second part being movable between iirst and second positions, spring means to bias said second part to the second position in which the latter engages said first part to latch said closure member in its closed position, said second part and grooved disc being so constructed and arranged that, when said spindle is turned to close said valve, said spring means is rendered operable to move said second part to its second position
  • a dishwashing machine a cabinet having an ,access opening and a closure member for closing the opening, means for supporting dishes and other objects to be Washed in said cabinet, spraying means in said cabinet for directing Water in a multiplicity of directions toward the dishes, hinge structure for pivotally mounting said closure member at the vicinity of the top edge portion thereof to said cabinet for angular movement about an axis, said closure member in its closed position depending vertically downward from said hinge structure, said hinge structure including means for manually moving said closure member freely about its axis against the force of gravity in a direction from its closed position, and braking means operatively connected with said hinge structure for holding said closure member against the force of gravity when the latter is released after being moved different angular distances about its axis from its closed position.
  • a dishwashing machine a cabinet, means for supporting dishes and other articles to be washed in said cabinet, spraying means in said cabinet for directing water in a multiplicity of directions toward the dishes, said cabinet having an access opening at the front thereof, a closure member for closing the opening, hinge means for pivotally mounting said closure member at the top thereof to the front of said cabinet, a drip shield pivotally mounted on the inner side of said closure member adjacent the top thereof, said drip shield being formed and arranged to move by its own weight, when said closure member is opened, to collect water dripping from the latter and discharge such collected water rearwardly from said closure member toward the interior of said cabinet.
  • the dishwashing machine set forth in claim 8 ili ⁇ P cluding a trough, atthe outer face of the front of said cabinet for collecting drip water discharged from said drip shield, said trough being located at the vicinity of the bottom peripheral edge portion of the access opening and being apertured to allow drip water to pass therefrom into the interior of said cabinet.
  • a dishwashing machine a cabinet having an access opening and a closure member for closing the opening, means for supporting dishes and other objects to be washed in said cabinet, spraying means in said cabinet for directing water in a multiplicity of directions toward the dishes, conduit means for conducting water from a source of supply to said spraying means, said conduit means including a section outside said cabinet at the vicinity of a vertical wall thereof having an opening therein, said section having a break or gap so that water flowing therethrough to said spraying means is at atmospheric pressure when passing the gap, and structure including the opening in said vertical wall to provide a path of flow for liquid between the interior of said cabinet and said conduit section adjacent said gap having a trap which forms a liquid seal when lled with-liquid.
  • a dishwashing machine a cabinet having an access opening and a closure member for closing the opening, means for supporting dishes and other objects to be washed in said cabinet, spraying means in said cabinet for directing water in a multiplicity of directions toward the dishes, conduit means for conducting water from a source of supply to said spraying means, said conduit means including a section outside -said cabinet at the vicinity of a vertical wall thereof having an opening therein, said section including parts having a break or gap therebetween so that water Howing therethrough to said spraying means is at atmospheric pressure when passing the gap, both of said parts and the gap therebetween being disposed in their entirety outside said cabinet, and structure including the opening in said vertical wall to provide a path of ilow for liquid between the interior of said cabinet and the parts of said conduit section at said gap, a trough at the inside of said vertical wall beneath the opening therein, and a plate at the inside of said vertical wall which overlies the opening therein and is spaced therefrom, said plate having the lower edge thereof depending in said trough to provide
  • a dishwashing machine In a dishwashing machine, a cabinet having'an access opening and a closure member Vfor closing lthe opening, means for supporting dishes and other objects to be washed in said cabinet, spraying means in said cabinet for directing water in a multiplicity of directions toward the dishes, said spraying means comprising a number of spraying members, conduit means for conducting water from a source of supply to said spraying members, a liquid distributor in said conduit means for controlling the supply of water to said spraying means, said distrihutor including a rotatable element which establishes communication between said conduit means ,and different spraying members during rotation thereof, and means to rotate said element.
  • the dishwashing machine set forth in claim l2 in which said means to rotate said element comprises an electric motor, and means to control said motor responsive to water pressure in said conduit means.
  • the dishwashing ⁇ machine setforth in claim 13 which includes a valve in said conduitlrneans ahead of said liquid distributor, and said 4means to control said motor is operable responsive to water pressure in said conduit means at a region thereof between said valve and said distributor.
  • the dishwashing machine set forth in claim l2 which includes a ⁇ control yvalve in said conduit means conduit means past said control valve to said liquid distributor, a receptacle adapted to contain washing agent, a connection for diverting water from a point in said conduit means ahead of said control valve to said receptacle and from the latter to said conduit means at a point from which the diverted water can ow to said liquid distributor, and means including said valve member for controlling ow of diverted water through said connection.
  • a cabinet having an accessV opening and a closure member for closing the opening, means for supportingl dishes and other objects to be washed in said cabinet, spraying means in said cabinet for directingwater in a multiplicity of directions toward the dishes, said cabinet having provisions for mounting the same on a wall at approximately eye-level, for example, saidcabinet comprising a front hood and rear wall secured thereto, hinge means for pivotally mounting said closure member at the vicinity of the top edge portion thereof to said front-hood, said closure member in its closed-position depending vertically downward from said hinge means, -and said hinge means including structure forming a unitarypart thereof for holding said closure member against the force of gravity after being manually Ymoved upwardly from its closed position.
  • a dishwashing machine a cabinet having a front access opening and a closure member therefor, spraying means in the cabinet for directing water in a multiplicity of directions therein, provisions in the cabinet for supporting glasses, cups, plates and saucers, said provisions including first and second dish racks removably supported in the cabinet alongside one another, said first dish rack being apertured and providing a supporting surface which extends from the front of the cabinet to one region of the rear wall thereof, said second dish rack extending from the frontof the .cabinet to another region of the rear wall thereof, said second dish rack having an apertured front section and a notchedrear section to receive plates and the like ⁇ in planes transverse to the rear wall of the cabinet, 4and a plurality of elements fixed to the other region ofthe rear wall above said second dish rack to hold the .plates and the like ⁇ positioned in the notched rear section thereof.
  • a dishwashing machine a cabinet having an access opening and a closure member for closing the opening, means ⁇ for supporting dishes and other objects to be washed in said cabinet, spraying means in said cabinet for directing water in a multiplicity of directions toward the dishes, conduit means for conducting water from a source of supply to said spraying means, said conduit means including a section outside said cabinet at the vicinthe opening in said vertical wall establishing iluid communication between the interior of said cabinet and said conduit section adjacent said gap.
  • the dishwashing machine set forth in claim 21 includingl valve means connected in said conduit means, and structure for operating said valve means including a manually operable control member, said last-mentioned structure comprising means for rendering said control member operable to open said valve means only when said closure member is in its closed position.
  • the dishwashing machine set forth in claim 21 including valve means connected in said conduit means at a region thereof between the source of supply and the gap, and means including a manually movable member accessible at the exterior of said cabinet for controlling said valve means.
  • valve means connected in said conduit means at a region thereof between the source of supply and the gap, and structure for operating said valve means including a manually operable control member, said last-mentioned structure comprising means for rendering said control member operable to open said valve means only when said closure member is in its closed position.

Description

Feb- 25, 1958 J. F. R. KARLsTRoM 2,324,567 l DISHWASHING MACHINE Filed Nov. 20. 1952 4 Sheets-Sheet lV T N E 7 A Feb. 25, 1958 J. F. R. KARLsTRoM 2,824,567
DISHWASHING MACHINE Filed Nov. '2o. 1952 4 sheets-.sheet 2 LWENTOR.
TTORNEY Feb- 25, 1958 J. F. R. KARLsTRoM v 2,824,567
' f DISHWASHING MACHINE Filed Nov. 20. 1952 f1A Sheets-Sheet 3 INVENTO R.
ol l i. I Ml y 97 i A 2), //a f5 /19/ Feb# 25,- 1958 J. F. R. KARLsTRoM 2,824,567
DISHWASHING MACHINE Filed Nov. 20, 195.2
4 Sheets-Shet 4 lll ' L\'I/'ENTOR.
/ITTORNE Y United States Patent DISHWASHING MACHINE Johan Fredrik Robert Karlstrom, Stockholm, Sweden, as-
signor to Aktiebolaget Elektroiux, Stockholm, Sweden, a corporation of Sweden Application November 20, 1952, Serial No. 321,692
Claims priority, application Sweden November 24, 1951 25 Claims. (Cl. 134-57) This invention relates to dishwashing machines having a cabinet in which dishes and the like are cleansed by complished by providing a cabinet having' an access opening in a wall thereof adapted to be closed by a hinged closure or door which is movable outwardly from and toward its closed position and by itself will remain in any desired open position to which it has been moved when the closure or door is released.
Accordingly, the closure or door does not need to be moved to a position to remain open in which a part thereof projects above the top of the cabinet, so that a dishwashing machine of the invention of a given capacity will require an installation space of minimum height. Further, the dishwashing machine may be installed on a wall at eye-level height beneath kitchen cabinets and other projecting structures by reason of the fact that the hinged door or closure can be swung upwardly fromits closed position to a horizontal position and will automatically remain in such horizontal position the instant it is released.
In a preferred embodiment, the top peripheral edge portion of the door or closure is hinged to the front wall of the cabinet at a region below the extreme top edge thereof, the hinge embodying provisions to permit relatively free opening movement being imparted tothe door and capable of imparting a braking action to hold the door in its open position and prevent free movement thereof toward its closed position when released. ...The front wall of the cabinet desirably slopes rearwardly from the bottom to the top thereof, and, since the door or closure is hinged to the front wall at the upper part thereof, the overall distance taken up by the depth of the cabinet and door in its horizontal open position accordingly will be at a minimum for a machine of a given capacity.
Further, the bottom of the cabinet slopes downwardly from the front Wall to the rear wall thereof so that, while the front wall slopes rearwardly in the manner described, a maximum amount of space is provided at the bottom of the cabinet for housing parts of the dishwashing machine. In addition, a suitable trough may be provided at the exterior face of the front wall of the cabinet to catch and collect water that drips from the door or closure when it is moved from its closed position to gain access into the interior of the cabinet. Such trough desirably is located at the bottom peripheral edge of the access opening and in communication with the interior of the cabinet in such a way that water readily passes into the cabinet while water splashing therein during operation of the machine cannot readily ow inthe opposite direction.
'In accord with the invention, a combination vacuum breaker and water seal is provided at a side wall ofthe 'ice cabinet., The vacuum breaker is connected in the water supply line for conducting water to the dishwashing machine, such vacuum breaker providing a space at atmospheric pressure in the supply line which is in communication with the interior of the cabinet for conducting to the latter water dripping in the space. The water seal is formed by such dripping liquid to segregate air in the cabinet from the space in the vacuum breaker which is at atmospheric pressure. A Y
The spraying devices in the preferred embodiment ofv the invention include nozzles for discharging liquid jets therefrom, the nozzles being caused to rotate in one direction by the reaction force developed by the jets. In addition, rotatable jet dehecting members are provided which are rotatable in the opposite direction by the impact force of the jets on the members. The jet deflecting members are formed with grooves to deflect the jets in a multiplicity of different directions toward the dishes to be washed in the cabinet. In accord with the invention, parts associated with the nozzles are brought into frictional engagement with parts associated with the rotatable jet deecting members responsive to the water pressure in the spraying devices, thereby imposing a braking action on-the rotatable nozzles to reduce the speed which vthey otherwise attain by the reaction force devel-l oped by the jets.- r n,
The invention/together with the above and other objects and advantages thereof, will be more fully under-l stood upon reference to the following description and accompanying drawings forming a part of this specification, and of which: Y
Fig. 1 is a side elevation of a dishwashing machine embodying my invention which is mounted on a wall at eye-level; v l Y Fig. 2 is an enlarged vertical sectional `view taken at line 2-2 of Fig. 3 illustrating the apparatus more clearly;
Fig. 3 is a horizontal sectional view taken at line 3-.3 of Fig. 2; n
Fig. 4 is a front elevation of the apparatus of Figs. 1, 2 and 3, the front closure or door being open to illustrate details;
Fig. 5 is a fragmentary sectional view taken at line 5 5 of Fig. 3; i
Fig. 6 is a fragmentary sectional view taken at line 6 6 of Fig. 2 v
Fig. 7 is an enlarged vertical sectional view of the front closure or door and parts of the machine at the vicinity of the access opening;
Fig. 8 is a fragmentary horizontal sectional view taken at line 8-8 of Fig. 7; l
Fig. 9 is a fragmentary front view of the apparatus illustrating the front closure in its closed position;
Figs. 10 vand 11 are fragmentary sectional views taken at lines 10-10 of Fig. l1 and 11--11 of Fig. 10, respectively, illustrating more clearly details of the locking mechanism for the front closure of the machine;
Fig. 12 is a sectional view takenat line 12-12 o Fig. 5; v Y
Fig. 13 is an enlarged vertical sectional view of the receptacle shown in Fig. 3 adapted to yhold a suitable washing agent; l., V
Fig. 14 is an enlarged sectional view of details shown in Fig. 13; y Y v Fig. 15 is a sectional view taken atline 15-15 of Fig. 13;
Figs. 16 to 19 are sectional views of details of the machine, Fig. 16 being taken at lines 16-16 of Figs. 18 and 19, Fig. 17 being taken at line 17--17 of Fig. 16, Fig. 18 being taken at line V18-18 of Figs. 16 land `19 and Fig. 19 being taken at line 19-19 of Fig.V `18;
Fig. 20 is a fragmentary. sectional, View ,Ot .details of the machine; and
Fig. 21 is a sectional view taken at line 21-21 of Fig. 20.
Referring to the drawings, the dishwashing apparatus which I have shown embodying my invention comprises a shell or casing adapted to be mounted on a wall 11 at eye-level height, for example, to facilitate the insertion and withdrawal of dishes into and from the apparatus. The casing 10 provides a housing having a top 12, side walls 14, bottom 15, rear wall 16 and front wall 17 having an access opening 18 adapted to be closed by a front closure or door 19 hinged at 20 to the front wall.
The body portion of the casing 10 desirably is formed from a single stamping bent to provide a hollow rectangular section which delines the top 12, side walls 14 and a major part of the bottom 15. In forming such rectangular section, the bottom is arranged to slope downwardly from the front to the rear of the apparatus, as best seen in Fig. 2, to promote rapid draining of water in a manner to be explained presently. Referring to Fig. 2, it will be seen that the hollow rectangular section of the casing 10 is formed at the front and rear edges 21 and 22 to receive front and rear plates, respectively, the front plate being shaped to provide the front wall 17 and forward part of the bottom 15 while the rear plate defines the rear wall 16 of the casing.
The upper part of the plate forming the rear wall 16 of the casing 10 desirably is formed with outwardly projecting regions 23, as best seen in Fig. 2, which are adapted to bear against the wall upon which the dishwashing apparatus is mounted. The regions 23 of the rear wall 16 may be formed with openings or slots of key-hole shape, not shown, to receive the ends of hooks or other suitable supports fixed to the wall.
V connected to the opposing ends thereof.
A pair of spraying devices are disposed alongside each i other beneath the top 12 and another pair of similar spraying devices are disposed above the bottom 15 of the casing. As shown in Fig. 3, each spraying device at the vicinity of the bottom 15 comprises a rotatable nozzle 24 having a plurality of discharge openings, such nozzles being effective to rotate responsive to supply of liquid thereto under pressure. Each spraying device also embodies a rotatable member having radially extending arms 25 for changing the direction of the jets discharged from the openings of nozzle 24 and directing liquid in a multiplicity of directions toward the dishes to be washed. The positions the spraying devices assume below the top 12 and above the bottom 15 of the casing are best shown in Figs. 6 and 5, respectively.
Within the casing 10 at the bottom part thereof is provided a liquid distributor 26 for regulating the supply of liquid to the spraying devices. The liquid distributor 26, which is driven by a motor 27, is also provided with suitable control valve 28 for shutting olf the supply of liquid to all of the spraying devices, aswill be described more fully hereinafter.
A pair of dish racks 29 and 30 are positioned alongside each other in the bottom part of casing 10 above the bottom spraying devices. The front and rear plates of the easing may be provided with suitable tabs, like the tab 31 seen in Fig. 2, for example, to hold the racks 29 and 30 in position and permit easyremoval of the racks from the interior of the casing 10. A'support 32 formed of wire is fixed to the rear wall 16 to facilitate positioning of dishes on the rack 29. In addition, a small perforated basket 33 adapted to lhold small articles, such as knives, forks and spoons,'for example, is re-A movably mounted in any suitable manner at' the -rear wall 16 of the casing.
Within the left-hand end of the forward part ofthe casing 10 is provided a receptacle 34 which is mounted on the front plate 17 in any suitable manner. The receptacle 34 is adapted to hold a body of washing agent which is mixed with the washing liquid in a manner which =will `be explained more fully hereinafter. The hinges 20 are located at the front wa1l 17 at the upper part of the access opening 18 and are of such construction that the closure or door 19 can be raised to any position desired and by itself will remain at such position when released. As best seen in Figs. 7, 8 and 9, each hinge 20 comprises a U-shaped stationary part 35 which is secured at 36, at the closed end thereof, to the front wall 17, and a cooperating movable part or strap 37 which is fixed at 38 to the door 19. The upper part 39 of strap 37, which is of cylindrical shape and hollow, snugly fits between the spaced apart sides of stationary part 35. The pivotal connection between parts 37 and 35 is formed by a bolt or pin 40 and nuts 41 threadedly The nuts 4l are of the shape shown in Fig. 8 and formed with inwardly extending hollow sleeves 42 which pass through openings in the side walls of U-shaped part 35 and are internally threaded to receive the threaded end portions of pin 40.
A hollow tubular member 43 is held in the cylindrical part 39 of strap 37 about the inwardly extending sleeves 42 of the tightening nuts 41. The tubular member 43 may be referred to as a friction tube and desirably is formed of a suitable material like plastic, for example. About the friction tube 43 and lengthwise thereof is provided a tightly wound coil spring 44. The spring 44 is of helical form, and, while the wire forming such spring is shown in Fig. 8 as being circular in cross-section to facilitate illustration thereof, in practice it has been found advantageous to employ wire essentially rectangular in cross-section to form the spring 44. One end of the coil spring 44, which may be referred to as a tightening spring, is freely disposed about the friction tube 43, while the other end 45 thereof extends into an opening formed in cylindrical part 39 of movable strap 37 and is connected to the latter, as shown in Fig. 7. In order to insure good friction being developed between the friction tube 43 and stationary part 35 of each hinge, a spring washer 46 is provided between one tightening nut 41 and a side wall of the hinge part 3S.
Y The tightening springs 44 in the hinges 20 are disposed about the friction tubes 43 in such a manner that, when the front closure 19 is moved upwardly from the closed position shown in Fig. 7, the inner diameter of each tightening spring 44 is increased and friction between the springs 44 and tubes 43 about which the springs are disposed, is eliminated. Accordingly, the front closure or door 19 can be moved upwardly to any open position desired without developing any friction between the springs 44 and friction tubes 43 which would tend to retard or resist opening movement being imparted to the front closure 19.
When the front'closure 19 is released after being moved to a. desired open position, it will remain in such open position because the springs 44 will contract and tighten about the friction tubes 43 the instant the closure member is no longer held in place. The friction developed between the friction tubes 43 and springs 44 tightly held thereon is suicient to support and hold the closure or door 19 in the open position to which it has been moved. In certain instances friction tubes 43 also will hold and support the closure in its open position by reason of the friction developed between the ends of the friction tubes and the spaced apart sides of the U-shaped hinge parts 35, When the front-closure 19 subsequently is manually moved downwardly to its closed position, the coil springs 44 are turned or rotated because the coil ends 45 are fixed to straps 37, Since the coil springs 44 are contracted and tightly hug the friction tubes 43, the latter are also turned and moved in the same direction as the springs 44 when the closure 19 is being moved to its closed position. Under such'conditions the friction developed between the ends of the friction tubes 43 and spaced apart sides of U-shaped parts 35 essentially balance the weight of the closure 19, such friction being overcome by the manual etort required to move the closure to its closed position. Y Referring to Figs. 1, 2 and 7, it will be seen that the door 19 slopes rearwardly from the vertical so that the depth of the casing is somewhat smaller at the top 12 than at the bottom 15. As best shown in Figs. 2 and 7, the door 19 comprises a frame 47 having a transparent window 48 mounted thereon with the aid of a rubber gasket 49. About the periphery of the door 19 is provided a sealing gasket 50 which may be formed of resilient material like rubber, for example, which snugly tits about the access opening 18 when the door 19 is moved to its closed position.
A trough 51 is provided at the outside of the access opening 18 at the bottom peripheral edge portion thereof. The trough 51 is formed with a series of openings 52 to allow water to pass and drain into the inten'or of the casing, such openings being shielded to prevent water in the interior of the casing from owing into the trough. At the inside of the door 19, at the upper part thereof, is provided a freely swingable water collecting member 53 which acts to direct liquid therefrom into the interior of cabinet or casing 10 or into trough 51 when the door 19 is moved outwardly from its closed position. The member 53 essentially constitutes a liquid collecting trough which may be formed from a metal stamping having upwardly bent tabs 54 whose upper ends are pivotally .mounted on a pin 55 fixed to the inside face of the door 19 in any suitable manner. `nearer to the door 19 is bent to hold a weight 56 in order ito balance the trough 51, so that it will assume the cori rect position and function properly to direct liquid collected thereon into the interior of the casing 10 and into The edge of member 53 apart upright walls 78 of a U-shaped bracket fixed to the top of the housing 62. In th'e closed position of the door 19 in Fig. 7, the locking plate 77 acts against the locking roller 74 to keep the slide 70 in the position shown against'the upward biasing action of spring 72. In such case,` as seen in Fig. 7 and the dotted line positions of roller 73 and hook 69 in Fig. l1, the hook 69 occupies a position in the arcuate-shaped groove 65 which permits the rod or sternl 59 to be turned with the raid of knob 60, so that control valve 28 will be rendered operable to allow washing liquid to be supplied to the spraying devices.
When the knob 60 is turned to render control valve 28 inoperable to supply washing liquid to the spraying devices and the door 19 is open, the turning of the disk 64 causes the hook 69 to pass from arcuate groove 65 to the radial groove 67 and spring 72 will then become elective to move slide 70 upwardly. When this occurs, the hook 69 will occupy the position shown in Fig. 10 and in solid lines in Fig. 11, at a region between the 'periphery of disk 64 and groove 65, thus holding the disk in a locked position and preventing turning of rod 59 with knob 60 as long as the door 19 remains open.
A casing 80 is mounted at the underside of the casing 10, as shown in Figs. 4 and 5. The casings 10 and 80 together provide a space in which is disposed a common valve housing 81 for a pair of valve members 82 and 83. The valve member 83, which is fixed to and movable with a vertical shaft 84, serves as a part of the liquid distributor 26 to cause washing liquid to be delivered intermittently to the spraying devices through passages 85, 86, 87 and 88 of housing 81, as shown in Fig. 17. The valve member trough 51 when the door 19 is raised from its closed position with the aid of a handle 57 fixed thereto at 58.
Referring to Fig. 2, it will be seen that the control valve 28 for controlling the supply of washing liquid to the spraying devices in the cabinet 10 is provided with an elongated rod or stem 59 which extends to the front wall 17 and is operable at the front of the machine by a control knob 60. A suitable lock 61 is provided at the vicinity of the door 19 which is operatively associated with the rod or stem 59 and makes it necessary to turn the knob 60 and move the control valve 28 to its closed position to shut off the supply of liquid to the spraying devices before the door 19 can be opened.
As best shown in Figs. 7, 10 and 11, the lock 61 cornprises a vertically extending housing 62 which is fixed at 63 to the front wall 17 of the casing. A longer side wall of housing 62 is formed with an opening to receive a reduced forward section 59a of the rod 59 upon which is secured a disk 64 having arcuate-shaped grooves or slots 65 and 66 and a radially extending groove 67 communieating with an end of groove 65 and extending to the outer periphery of disk 64. As shown in Fig. 7, the groove 66 receives a bent hook 68 formed at the extreme lower end of the longer side wall of the housing 62. In Fig. 7 the groove 65 receives the lower hooked end 69 of a slide 70 which is vertically movable along the inside face of the longer side wall of the housing 62, such slide having a bent end or tab 71 intermediate the ends thereof. A coil spring 72 is held under compression within the housing 62 between the tab 71 and a roller 73 which acts and bears against the periphery of disk 64. Hence, the spring 72 is constantly acting to urge the slide 70 upwardly, the slide having a section 70a projecting upwardly above the housing 62 to which a locking roller 74 is fixed at the upper end thereof. The slide 70 is guided Within housing 62 by a guide roller 75, and the action of the compression spring 72 causes the locking roller 74 to act and bear against the underside of a curved section 76 of a locking plate 77 projecting inwardly from the door 19 and xed thereto at 58. Y
Y When the door 19 is in the closed position shown in IFig. 7,- the locking plate 77 is disposed between spaced 82, which controls the supply of washing liquid to all of the spraying devices and forms a part of control valve 28, is disposed in the upper part of housing 81 and rotatable therein. The valve member 82 is connected to an inner section of the rod or stem 59, such inner section being joined to the outer or forward section thereof by a sleeve or coupling 89, as shown in Figs. 2 and 5.
Washing liquid is supplied to the valve housing 81 through a liquid supply line 90, as shown in Fig. 4. A flexible connection 91, such as a rubber hose, for example, may be connected to supply line to deliver washing water thereto from a water tap having a mixing unit for mixing the desired quantities of hot and cold water. At the front Wall of casing 80 the supply line 90 is provided with a connecting bend 92 which communicates with a conduit section 93 connected to the inlet 94 of the valve housing 81, as shown in Figs. 4 and 5.
When the valve member 82 is in the closed position illustrated in Fig. 5, the supply of washing liquid to the machine is shut oi and no washing liquid is delivered to the spraying devices. However, when the valve member 82 is in the open position illustrated in Figs. 16 and 18, Washing liquid can ow through the housing 81 into a chamber 95 immediately above the valve member 83.
As previously explained, the valve member 83 is xed to a vertical shaft 84 journaled in the housing 81. To the lower end of shaft 84 is tixed a gear 96 which engages a worm 97 xed to the shaft 98 of the motor 27, as best shown in Figs. 5 and 12. When the motor 27 is energized, the shaft 84 is driven at a relatively slow speed by reason of the speed reduction eifected by the worm 97 and gear 96. Hence, the valve member or'distributor 83 is also driven at a relatively low speed so that an opening 99 in the wall thereof successively establishes communication between the chamber 95 and the passages 85, 86, 87 and 88, respectively, as shown in Figs. 17 and 19.
The hollow valve member or distributor 83, which is of cylindrical form, is formed with two openings or recesses 100 and 101 in the outer wall surface thereof which are in communication with the interior of the distributor. The openings 100 and 101 are at levels above and below the passages 85, 86, 87 and 88 and liquid can pass into and overcoming the oblique Aloads Ato which the valve ^7 member or distributor 83 may be subjected by the pressure of the washing liquid entering chamber 95 in the housing 81.
As shown in Fig. 13, the receptacle 34 for Washing agent comprises a cylindrical casing 102 and a bottom part 103 fixed thereto. Washing agent may be poured into the casing 102 throughan opening 104 adapted to be closed by a cover 105 which is connected by a flexible chain 106 to the casing. A pair of hollow tubes 107 and 108 extend upwardly within the casing 102 for circulating washing liquid therethrough. As shown in Figs. 13 and 18, washing liquid supplied to the inlet 94 of housing 81 llows therefrom through a passage 109 to which is connected one end of a conduit 110, the other end of which is connected to the lower end of tube 107. Washing liquid containing the washing agent llows downwardly through tube 108 and enters the left-hand open end of a hollow sleeve 111, the right-hand end of which is threadedly connected at 112 to the bottom part 103 of the receptacle 34. The washing liquid passes through elongated slots 114 in the sleeve 111 and screening 115 which is of cylindrical form and disposed about the sleeve. After passing through the screen lilter just described, the washing liquid flows through a conduit 116, one end of which communicates with the space about the screening 115 and the other end of which is connected to a passage communicating with a chamber 117 in the valve housing 81. The ilow of washing liquid from chamber 117 in Fig. 18 to the chamber or space 95 above the valve member or distributor 83 is controlled by valve member 82 in a manner which will be described hereinafter.
Referring to Fig. l2, the electric motor 27 is connected to a source of electrical supply with the aid of a circuit which includes a terminal board 118, conductors connected to such terminal board and the motor 27, and a control switch 119 connected in the circuit. The switch 119 includes a pivotally mounted lever or arm 120 arranged to be acted upon by a pin 121 of a pressure operated control device 122. The control device comprises a casing having the interior thereof divided into top and bottom spaces by a diaphragm 123. The top space is connected by a hollow tube 124 to a passage 125 in valve housing 81, as shown collectively in Figs. V and 12. In this way the diaphragm 123 in control device 122 will be subjected to the pressure of washing liquid when valve member 82 is open and such liquid can flow to the liquid distributor 26.
The upper end of pin 121 is connected to the diaphragm 123 which is biased upwardly by a suitable spring, not shown, provided in the bottom space of control device 122. The compression of the spring just mentioned is such that, when the valve member 82 is closed and the passage 125 is not subjected to pressure of washing liquid, the spring effectively causes the diaphragm 123 to move upwardly and raise pin 121 to its upper position, thereby rendering switch 119 ineffective to complete the circuit for the motor 27. When the valve member 82 is open and washing liquid pressure is transmitted through tube 124 to the space above the diaphragm 123, the latter will be moved downwardly against the action of the spring in the bottom space of the control device 122, thereby rendering pin 121 operable to move lever 120 to close the switch 119 and complete the circuit for the motor 27. In the event leakage occurs at the diaphragm 123 which allows washing liquid to reach the bottom space of the control device 122, such liquid tlowing into the bottom space is conducted therefrom to waste through a suitable connection 126.
Referring particularly to Figs. 3 and 4, a vacuum breaker 127 is provided in the washing liquid supply line 90 at one of the side walls 14 at the rear thereof. As best shown in Figs. 4 and 21, the llexible connection 91 is connected to the lower end of a vertically extending section of the supply line 90, the upper end of which is connected to the inlet 128 `of the vacuum breaker 127.
The outlet 129 of the vacuum breaker is connected to another section of the supply line which extends downwardly at the side wall 14 of the casing 10 and then extends beneath the bottom 15 thereof to the connecting bend 92.
As shown in Figs. 20 and 21, the vacuum breaker 127 comprises a housing or shell 130 within which are disposed nozzles 131 and 132 having an air gap 133 therebetween. Immediately above the air gap 133 the shell 130 is formed with openings 134 to provide a vent to atmosphere. ln operation, washing liquid under pressure flows through one section of the supply line 90 to the inlet 128 with which the nozzle 131 is in communication. The liquid discharged from the orifice of nozzle 131 in the form of a narrow stream or jet enters the nozzle 132 to which the outlet 129 is connected. The liquid passing through the air gap 133 will be at atmospheric pressure, and, after reaching the outlet 129, continues in its path of flow through the supply line 90 to the control valve 28, as previously described.
The lower open end of the shell 130, which is in the form of a tear drop as seen in Fig. 20, is connected to an opening 135 in the side wall 14 of casing 10. Such connection desirably is made fluid tight with the aid of nipple 136. Another housing is formed at the inner face of the side wall 14 at the vicinity of opening 135 by a semicircular plate 137 and a U-shaped trough 138 into which the bottom edge portion of plate 137 extends, as shown in Figs. 2 and 20. The plate 137 is secured to the side wall 14 to provide a space which is sealed ofi from the air within casing 10 when the trough 138 is filled with liquid. The trough will always be full of liquid due to leakage at the orifices of the nozzles 131 and 132, such liquid overflowing, of course, from the trough into the interior of the casing 10. By combining the vacuum breaker 127 with the water seal just described, the siphoning of water back to the source of supply is prevented in the event of a drop in line pressure, and the withdrawal from the casing 10 of air which may be contaminated, is avoided.
Water drains from the casing ,10 into a short pipe section 139 xed to an opening in the bottom 15 at the rear part thereof, as shown in Fig. 4. In this way water draining toward the rear part of the downwardly sloping bottom 15 reaches the outlet pipe section 139. A funnel-shaped member 140 is supported by bolts 141 at the underside of casing 10, the wider top opening thereof being spaced from and in alignment with the pipe section 139 while the narrower bottom opening is connected to a conduit 142 for discharging the washing liquid to waste, such as the sink indicated in dotted lines in Fig. 1. With the arrangement just described, liquid will overflow from the sides of the funnel member 140 in the event the discharge conduit 142 becomes clogged, thereby avoiding tlooding of the casing 10 with liquid due to backing up of liquid in the discharge line.
As shown in Fig. 3, a pair of rotatable spraying devices can be seen at the underside of the apertured dish racks 29 and 30. Another pair of such spraying devices are located beneath the roof or top 12 of the casing 10. One of the spraying devices at the bottom 15 of the casing is shown in Fig. 5, and one of the spraying devices at the roof 12 is shown in Fig. 6. The spraying devices at the top and bottom of the casing generally are the same and the slight differences between them will be pointed out presently.
Each of the spraying devices comprises `a hollow body member 145 secured to the top 12 or bottom 15 by a flanged collar 146. The collars 146 are formed with outer anges which overlie the peripheral edge portions of apertures formed in the top 12 and bottom 15, respectively. The body members 145 are formed with shoulders to receive the inwardly extending flanges of the collars 146, the neck portions 147 of the body members being threaded t9 receive tightening .caps 14,8 which l from the top 12.
Each body member 145 is formed with -a sleeveor part 150 of reduced cross section which projects toward the center region of the casing 10. Rotatable hub members 151`are journaled on the sleeves 150 with the aid of ball bearings 152 and 153. To the extreme outer ends ofthe sleeves 150 are fixed stationary plates 154 of annular form which are apertured to hold ball bearings 155 in recesses provided at the inwardly extending faces of the rotatable hub members 151. Discs 156 are fixed`to and turnable with rotatable nozzle heads 157,.each of which is provided with a pair of the nozzl`es 24.
The'nozzle heads 157 each include ka hollow stem 158 having a nipple part '159 fixed to one end by an apertured locking nut 160. The stem 158, which is located in the hollow interior or'centr'al passage 161 of the body member 145, is journaled at one end by Va neckv portion 162 of the nipple part 159 and 'at the opposite end by a cylindrical member163; As seen in Figs. 5 and 6, the nozzles v24 are fixed to the nipple parts 159 and receive liquid through channels in such parts and neck portions 162 from the passages 161 of the body members 145. o -r The surfaces of the cylindrical members 163 adjacent the caps 148 are dished inwardly, as seen in Fig. '5, to provide spaces 164 which communicate with the eloi1` gated passages formed in the hollow stems 158. `With such larrangement provision is made for removing from the spacers 164 water collecting therein due to leakage. Each body member 145 is formed with a liquid VVinlet 165 for introducing liquid intothe central passage 161.
As will be seen in Figs. Sand 6, vthe neck portion 162` of each nipple 1579'p'resents an area acted upon by the liquid in passage 161 which is smaller than that presented bythe cylindrical member 163. Hence, the static liquid pressure will be effective to bias each nozzle head 157 inl a lengthwise direction toward the top 12 and bottom 15, respectively, of the ca sing 10. Such biasing action imparted continuously inthe lengthwise direction 'of the stems 158 is effective to bring the discs bers 163 and internally located shoulders of the bodyv members 145, as shown in Fig. 6. In ,this way the weight of the top sprayingdevices is effectively transmitted to the bearings 166, thereby facilitating rotation of such spraying devices during operation of the machine.
As shown in Figs. 3, and 6, the arms 25 of arcuate shape are carried by the hub members 151 and extend radially outward therefrom. The jet heads4 157 are adapted to be `rotated. in one direction by the reaction force developed bythe liquid jets discharged from the nozzles 24.. Therliquid jets are discharged Yessentially in a horizontal direction from the nozzles 24. lThe arms 25 are positioned to beimpinged by the liquid jetsl dischargedv from `the nozzles 24the arms accordingly being rotated in the opposite direction of the, jet heads 157 ,by theimpact force of the jets acting thereon. The arms 25 may be referred to as liquid diverters for di- 50 156 in good frictional engagement with the balls 155k recting liquid inra multiplicity of diections toward the" dishes vadapted to be washed in the casing 10. Hence, each of the arms 25 is formed with a series of serra tions or grooves diagrammatically indicated at 167 in Fig. 3 to change the direction of the jets in a multiplicity of different directions depending upon the angular extent of curvature of the individual grooves. Hence, the outer peripheralnextremity of -certain grooves extend in' a vertical'direction a greater distance than other grooves, thus producing spaced apart peak points and valleys therebetween. VVThe 'spraying devices are shown and described inymy application Serial No. 740,585, filed April 10,'1947,*now -;Patent No. 2,673,761, grantedl March` '30, 1954, the disclosure of which is incorporated inthis application, and,-if desired, reference may be had thereto for a detailed description of the diverter arms 25..
The inlet 'of each spraying device is connecte-fl to one' of the passages 85, 86, 87 and 88 of the liquid` distributor 26. As shown in Figs. 3 and 19, pipes 170' an-d 171 connectthe passages 85 and 88 to the inlets; 165 of the sprayingdeviees at the vbottom of the casing 10. As seen in Figs. 2 and 19, pipe 172 connects the passage 86 and the inlet of the top spraying device at the left-hand side ofthe casing 10; and pipe 173 connects the passage 87 and the top. spraying device at the right-hand side of the casing 10.
Each of the hub members 151 is formed with a pulley Vportion to receive a belt 174, as shown in Figs. 5A
and6. As seen in Fig. 3, the belt 174 at the bottom of the casing 10 is crossed-and connected to the pulley por-V tions of the twoV bottom spraying devices. In a similar manner, the belt at the top of the casing, not shown, is
crossed and connected to the pulley portions of the two spraying devices below the ceiling of the casing 10. As previously explained, the. liquid distributor 26 operates to supply liquid intermittently to the spraying devices.
vice because liquid is not being supplied thereto at thatV instant. The belt 174 enables the active spraying devicev to drive the inactive spraying device which becomes a driven rotatable unitr and effective to promote a braking action on the hub member 151 and arms 25 of the active In this way the washing and rinsingY spraying device. action of liquid is improved in the manner explained in my application Serial No. 188,317, filed October 4, 1950,
now Patent No. 2,596,693 granted May 13, 1952; and, if desired, reference may .be had thereto for a detailed description ofthe advantages derived from the braking action just described to cause the liquid jets to issue from the arms 25 in a great number of directions and be effective in a wide field of action.
When the braking action isimposed on ber 151 and arms 25 of the active spraying device during the interval of timeliquid is being supplied thereto by the action of theliquid distributory 26, it is also advantageous to impose a braking action or frictional drag on the active nozzle head 157 Vto'effect better distribution of o the liquid jets. This is accomplished in the manner previously explained by utilizing the static liquid pressure in the' central passage 161 to bias the., nozzle head 157 in a lengthwise direction to bring thedisc 156 in frictional engagement with the balls 15S which are then more firmly seatedin the recesses formed in the rotatable hub member 151.- In thisvway a frictional drag is imposed on the active nozzle head 157 to slow down the speed of ,rotation of the latter induced by the jets issuing from the nozzles 24. Each spraying device at the bottom of the casing 10 is provided with a stationary the hub mem.v
1l plate 175, as best seen in Fig. 5, which is xed to the body member 145 and extends about the latter. In the event the belt 174 should come olf the pulley portions of the bottom spraying devices, the plates 175 serve to catch and hold the disconnected belt.
As previously described, dish racks 29 and 30 are removably supported within the casing alongside each other. The small perforated basket 33, which is removably supported at the rear wall 16 at the left-hand side of the casing, is formed with dividing walls 180, as shown in Fig. 3. The dish rack 30 in its entirety and the forepart of the dish rack 29 are of mesh form, as best seen in Figs. 2 and 3, to provide apertured supporting areas for cups, glasses and similar articles. The rear part of the dish rack 29 comprises widely separated slats 181 parallel to the side walls 14 of the casing 10 and a number of spaced apart Hat members 182 relatively close to one another and parallel to the front and rear walls 17 and 16, respectively, of the casing.
As shown in Fig. 2, the slats 181 are vertically disposed, the forward sections thereof forming a support for the mesh area of the dish rack 29 and the rear sections thereof being notched to receive the at members 182 which are also vertically disposed. The flat members 182 desirably may be stamped from sheet metal to provide metallic strips which include vertical sections 183 alternating with sloping sections 184 to provide a notched dish rack of the character shown in Figs. 3 and 4, the bottom ends of the vertical and sloping sections meeting at acute angles having the apices thereof along a horizontally extending plane which slopes downwardly from point 185 to point 186 at the rear wall 16 of the casing, as indicated in Fig. 2. As best seen in Fig. 3, the notches of adjacent at members 182 are in alignment from the forward part to the rear part of the casing 10, thus providing grooved regions having apices which receive the bottom peripheral edge portions of plates, platters, saucers, bowls and similar objects having flanged outer sections. In this way all of such dishes have their bottom peripheral edge portions in essentially the same horizontally extending plane at a region relatively near to the spraying devices, so that the dishes will be impinged by jets of water having a relatively high impact force. By employing slats 181 of the shape shown in Fig. 2, the mesh portion of the dish rack 29 is at a level essentially the same as the top edge of the foremost front flat member 182, thereby providing an arrangement to utilize the space in front of the at members 182 most electively for storing smaller articles ahead of the platters and plates placed on the at members 182.
As best shown in Figs. 2, 3 and 4, the wire coil 32 is mounted on the rear Wall 16 of the casing 10. The individual turns of the coil are hooked at 187 to spaced y apart bars or strips 188 which in turn are secured in any suitable manner to the rear wall 16. The coil is of attened form having longer straight vertical portions and shorter rounded end portions, as best shown in Fig. 2, to provide a coil having greater height than depth. As best shown in Fig. 4, each turn of the coil 32 includes a front part 189 which is essentially vertical or upright and a rear part 190 which is inclined to the vertical, so that the pitch of the coil, which is determined by the axial advance of each turn, is dependent upon the inclination of the rear parts 190 to the vertical.
Since the rear part of the rack 29 slopes downwardly toward the rear of the casing 10, the provision of the coil 32 facilitates supporting plates and platters and the like so that the rear peripheral edge portions bear against the rear wall 16, as indicated in Fig. 2, such rear support being elective irrespective of the size of the plates and being aided, of course, by proper spacing of the front straight portions 189 which act to hold the plates in a vertical or upright position.
Although many of the steps of the operation of the dishwashing machine just described will be apparent from the foregoing description, the following additional explanation of the operation will be given now. Assuming that the front closure 19 is in the open position shown in Fig. 4, the dishes to be washed are placed in the casing 10 and washing agent is poured into the receptacle 34. In the open position of the closure 19 in Fig. 4, the motor 27 is deenergized and the control valve 28 is closed. Upon moving the closure 19 to its closed position, the locking plate 77 at the rear side 0f the closure causes slide 70 to move vertically downward from the position shown in Fig. 10 to the position shown in Fig. 7, thus moving the hook 69 at the lower end of the slide from the solid line position in Fig. 11 to a radial position in groove 67 opposite an end of the arcuate groove 65, so that the knob 60 can now be turned in a counterclockwise direction to impart rotating movement to stem or rod 59. When the rod 59 is turned a suicient angular distance, the valve member 82 of control valve 28 moves from its closed to its open position and thus allows water to reach the chamber of the liquid distributor 26, as shown in Fig. 5.
When water enters the chamber 95, the diaphragm 123 of control device 122 is then subjected to line pressure by reason of t-he connection of tube 124 to passage in valve housing 81, as shown in Figs. 5 and l2. Under such conditions, switch 119 is actuated to complete the circuit for motor 27 and energize the latter. The cylindrical valve 83 of the liquid distributor 26 now commencesV to rotate, thereby delivering water intermittently to passages 86, 85, 88 and 87 in the order named. Since each of these passages is connected to one of the spraying devices, water is supplied for an interval of time to each spraying device, the water supply to one spraying device commencing the instant such supply is cut oliD to another spraying device.
. When the control knob 60 is rotated further in a counter-clockwise direction, the valve member 82 is turned an adequate distance in a counter-clockwise direction in Fig. 18 to allow water containing washing agent to flow from chamber 117 into chamber 95, such water also being distributed by the liquid distributor 26 to the several spraying devices. After an adequate amount of water containing washing agent is supplied to the spraying devices, the control knob 60 is then turned in a clockwise direction to rotate valve member 82 to the position shown in Figs. 16 and 18 to allow water to be supplied directly from the source of supply to the spraying devices. When it is determined that the dishes are cleansed, the knob 60 is then turned clockwise to shift the stem or rod 59 to such a position that hook 69 of slide 70 moves into the radially'extending groove 67, whereupon the closure 19 can be opened and the slide 70 will automatically move upward so that hook 69 will assume the solid line position in Fig. ll and prevent turning of knob 60 while the closure 19 remains open. When the knob 60 is turned back to its initial position as just described, the valve member 82 of the control valve 28 moves to its closed position to shut ol the supply of water to the'spraying devices. When this occurs the control device 122 in Fig. l2 is no longer subjected to line pressure ofwater and theswitch 119 opens to disconnect the motor 27 from the source of electrical supply, thereby stopping rotation o f valve member 83 in the liquid distributor 26.
AWhen the knob-60 is turned counter-clockwise to move the valve member 82 to its open position, the exible conduit 91 is connected to the source of supply of water, such as a water tap, having a mixing valve providing a suitable mixture of hot and cold water. If desired, a suitable solenoid operated valve (not shown) may be connected in the supply line 90 ahead of the inlet connection 1.28 shown in Fig. 2l which is normally closed 13 and will open automatically when the door 19 is in its closed position and the knob 60 has been turned to move valve member 82 to its open position.
By hinging the door 19 to the front wall 17 of the cabinet at regions below the top 12 and providing mechanism which forms a unitary part of the hinges themselves to hold the door in any open position to which it is moved, an arrangement is provided whereby the door 19 can be moved to the fully open position shown in Fig. 1 in which no part of the door projects above the top 12. In this Way the dishwashing machine can be mounted on a wall in a confined space and, in use, Ywill occupy no more space in a vertical direction than the vertical height of the cabinet itself.
Further, the provision of the vacuum break 127 in the supply line 90 is such that no additional space in a vertical direction is required even when this protective feature is incorporated in the dishwashing machine, as shown in Fig. 4.
Although I have shown and described a particular embodiment of my invention, I do not desire to be limited to the particular arrangements set forth, and I intend in the following claims to cover all modifications which do not depart from the spirit and scope of the invention.
What is claimed is:
1. In a dishwashing machine, a cabinet, means for supporting dishes and other articles to be washed in said cabinet, spraying means in said cabinet for directing water in a multiplicity of directions toward the dishes, ,said cabinet having an access opening, a closure member for the access opening, hinge structure for pivotally mounting said closure member on said cabinet about a horizontal axis between a closed position and a number of different open positions including a first open position in which no part of said closure member appreciably extends above the top of said cabinet, said hinge structure including means for freely moving said closure member manually upward against the force of gravity from its closed position to the different open positions including the first open position, and braking means embodied in said hinge structure for holding said closure member against the force of gravity when the latter is released after being moved to any one of the different open positions.
2. The dishwashing machine set forth in claim l in which said cabinet is formed with the access opening at a front wall thereof and said hinge structure for pivotally mounting said closure member comprises a hinge vfixed to the top edge portion thereof and to the cabinet at a region below the top thereof.
3. The dishwashing machine set forth in claim 1 in which said hinge structure comprises a hinge including two relatively movable parts, said braking means being embodied in said hinge and including a coil spring having one end thereof xed to one of said parts and the opposite end thereof adapted to frictionally engage said other part.
4. The dishwashing machine set forth in claim 1 in which said cabinet is adapted to be mounted on a wall and formed with the access opening at a front wall thereof, said hinge structure for pivotally mounting said closure member comprising a hinge xed to the top edge portion thereof and to said cabinet, the front wall of said cabinet sloping rearwardly in an upward direction with the top part thereof nearer to the rear wall of the cabinet than the bottom part thereof.
5. In a dishwashing machine, a cabinet, means for supporting dishes and other articles to be washed in said cabinet, spraying means in said cabinet for directing water in a multiplicity of directions toward the dishes, said cabinet having an access opening, a closure member for the access opening, hinge structure for pivotally mounting said closure member on said cabinet for movement about a horizontal axis between a closed position in which said closure member depends from said axis 14 and a number of different open positions'including a first open position in which the bottom of said closure member is substantially at or in the vicinity of a horizontal plane passing through said axis to gain access into said cabinet through the opening therein without the need for moving said closure member to a position in which a part thereof appreciably extends above the top of said cabinet, said hinge structure including means for freely moving said closure member manuallyA upward against the force of gravity from its` closed position to the different open positions including the irst open position, and braking means embodied in said hinge structure for holding said closure member against the force of gravity when the latter is released after being moved to any one of the different open positions.
6. In a dishwashing machine, a cabinet, means for supporting dishes and other articles to be washed in said cabinet, spraying means in said cabinet for directing water in a multiplicity of directions toward the dishes, said cabinet having an access opening, a closure member pivotally mounted on said cabinet for closing the opening, conduit means for conducting water from a source \of supply to said spraying means, a valve in said conduit means, a rotatable stem or spindle for operating said valve, a grooved disc fixed to said spindle and turnable therewith, locking provisions for said closure member including a rst part fixed to the latter and a second part coacting with the grooved disc, said second part being movable between iirst and second positions, spring means to bias said second part to the second position in which the latter engages said first part to latch said closure member in its closed position, said second part and grooved disc being so constructed and arranged that, when said spindle is turned to close said valve, said spring means is rendered operable to move said second part to its second position and prevent turning of said spindle to open said valve when said closure member is in an open position, said closure member in its closed position being operable to cause said second part to move to its rst position against the biasing action of said spring means and allow said spindle to be turned to open said valve.
,7. In a dishwashing machine, a cabinet having an ,access opening and a closure member for closing the opening, means for supporting dishes and other objects to be Washed in said cabinet, spraying means in said cabinet for directing Water in a multiplicity of directions toward the dishes, hinge structure for pivotally mounting said closure member at the vicinity of the top edge portion thereof to said cabinet for angular movement about an axis, said closure member in its closed position depending vertically downward from said hinge structure, said hinge structure including means for manually moving said closure member freely about its axis against the force of gravity in a direction from its closed position, and braking means operatively connected with said hinge structure for holding said closure member against the force of gravity when the latter is released after being moved different angular distances about its axis from its closed position.
8. In a dishwashing machine, a cabinet, means for supporting dishes and other articles to be washed in said cabinet, spraying means in said cabinet for directing water in a multiplicity of directions toward the dishes, said cabinet having an access opening at the front thereof, a closure member for closing the opening, hinge means for pivotally mounting said closure member at the top thereof to the front of said cabinet, a drip shield pivotally mounted on the inner side of said closure member adjacent the top thereof, said drip shield being formed and arranged to move by its own weight, when said closure member is opened, to collect water dripping from the latter and discharge such collected water rearwardly from said closure member toward the interior of said cabinet.
9. The dishwashing machine set forth in claim 8 ili`P cluding a trough, atthe outer face of the front of said cabinet for collecting drip water discharged from said drip shield, said trough being located at the vicinity of the bottom peripheral edge portion of the access opening and being apertured to allow drip water to pass therefrom into the interior of said cabinet.
l0. In a dishwashing machine, a cabinet having an access opening and a closure member for closing the opening, means for supporting dishes and other objects to be washed in said cabinet, spraying means in said cabinet for directing water in a multiplicity of directions toward the dishes, conduit means for conducting water from a source of supply to said spraying means, said conduit means including a section outside said cabinet at the vicinity of a vertical wall thereof having an opening therein, said section having a break or gap so that water flowing therethrough to said spraying means is at atmospheric pressure when passing the gap, and structure including the opening in said vertical wall to provide a path of flow for liquid between the interior of said cabinet and said conduit section adjacent said gap having a trap which forms a liquid seal when lled with-liquid.
11. In a dishwashing machine, a cabinet having an access opening and a closure member for closing the opening, means for supporting dishes and other objects to be washed in said cabinet, spraying means in said cabinet for directing water in a multiplicity of directions toward the dishes, conduit means for conducting water from a source of supply to said spraying means, said conduit means including a section outside -said cabinet at the vicinity of a vertical wall thereof having an opening therein, said section including parts having a break or gap therebetween so that water Howing therethrough to said spraying means is at atmospheric pressure when passing the gap, both of said parts and the gap therebetween being disposed in their entirety outside said cabinet, and structure including the opening in said vertical wall to provide a path of ilow for liquid between the interior of said cabinet and the parts of said conduit section at said gap, a trough at the inside of said vertical wall beneath the opening therein, and a plate at the inside of said vertical wall which overlies the opening therein and is spaced therefrom, said plate having the lower edge thereof depending in said trough to provide a liquid seal in said path of flow for liquid.
l2. In a dishwashing machine, a cabinet having'an access opening and a closure member Vfor closing lthe opening, means for supporting dishes and other objects to be washed in said cabinet, spraying means in said cabinet for directing water in a multiplicity of directions toward the dishes, said spraying means comprising a number of spraying members, conduit means for conducting water from a source of supply to said spraying members, a liquid distributor in said conduit means for controlling the supply of water to said spraying means, said distrihutor including a rotatable element which establishes communication between said conduit means ,and different spraying members during rotation thereof, and means to rotate said element.
13. The dishwashing machine set forth in claim l2 in which said means to rotate said element comprises an electric motor, and means to control said motor responsive to water pressure in said conduit means.
14. The dishwashing` machine setforth in claim 13 which includes a valve in said conduitlrneans ahead of said liquid distributor, and said 4means to control said motor is operable responsive to water pressure in said conduit means at a region thereof between said valve and said distributor.
l5. The dishwashing machine set forth in claim l2 `which includes a `control yvalve in said conduit means conduit means past said control valve to said liquid distributor, a receptacle adapted to contain washing agent, a connection for diverting water from a point in said conduit means ahead of said control valve to said receptacle and from the latter to said conduit means at a point from which the diverted water can ow to said liquid distributor, and means including said valve member for controlling ow of diverted water through said connection. g
1-6. The dishwashing machine set forth in claim 15 in which said valve member in its on position blocks ilow of diverted water throughl said connection, said valve member being movable to another position to allow water to tlow past said control valve and also through said connection. y
17. In a dishwashing machine, a cabinet having an accessV opening and a closure member for closing the opening, means for supportingl dishes and other objects to be washed in said cabinet, spraying means in said cabinet for directingwater in a multiplicity of directions toward the dishes, said cabinet having provisions for mounting the same on a wall at approximately eye-level, for example, saidcabinet comprising a front hood and rear wall secured thereto, hinge means for pivotally mounting said closure member at the vicinity of the top edge portion thereof to said front-hood, said closure member in its closed-position depending vertically downward from said hinge means, -and said hinge means including structure forming a unitarypart thereof for holding said closure member against the force of gravity after being manually Ymoved upwardly from its closed position.
18. The', dishwashing machine set forth in claim 17 in which the front wall of said cabinet slopes rearwardly from the bottom to the top thereof and the bottom of the cabinet slopes downwardly from the front to the rear thereof, said hood` comprising a front wall section and an intermediate section of rectangular form fixed thereto.
- 19. The dishwashing machine set forth in claim 18 in which the bottom of said cabinet includes parts of said front wall section as well as said intermediate wall section. ,U n.
20. In a dishwashing machine, a cabinet having a front access opening and a closure member therefor, spraying means in the cabinet for directing water in a multiplicity of directions therein, provisions in the cabinet for supporting glasses, cups, plates and saucers, said provisions including first and second dish racks removably supported in the cabinet alongside one another, said first dish rack being apertured and providing a supporting surface which extends from the front of the cabinet to one region of the rear wall thereof, said second dish rack extending from the frontof the .cabinet to another region of the rear wall thereof, said second dish rack having an apertured front section and a notchedrear section to receive plates and the like `in planes transverse to the rear wall of the cabinet, 4and a plurality of elements fixed to the other region ofthe rear wall above said second dish rack to hold the .plates and the like` positioned in the notched rear section thereof. j ,Y
2l. In a dishwashing machine, a cabinet having an access opening and a closure member for closing the opening, means `for supporting dishes and other objects to be washed in said cabinet, spraying means in said cabinet for directing water in a multiplicity of directions toward the dishes, conduit means for conducting water from a source of supply to said spraying means, said conduit means including a section outside said cabinet at the vicinthe opening in said vertical wall establishing iluid communication between the interior of said cabinet and said conduit section adjacent said gap.
V22. The dishwashing machine set forth in claim 2l iucluding valve means connected in said conduit means, and means including a manually movable member accessible at the exterior of said cabinet for controlling said valve means.
23. The dishwashing machine set forth in claim 21 includingl valve means connected in said conduit means, and structure for operating said valve means including a manually operable control member, said last-mentioned structure comprising means for rendering said control member operable to open said valve means only when said closure member is in its closed position.
24. The dishwashing machine set forth in claim 21 including valve means connected in said conduit means at a region thereof between the source of supply and the gap, and means including a manually movable member accessible at the exterior of said cabinet for controlling said valve means.
25. The dishwashing machine set forth in claim 21 including valve means connected in said conduit means at a region thereof between the source of supply and the gap, and structure for operating said valve means including a manually operable control member, said last-mentioned structure comprising means for rendering said control member operable to open said valve means only when said closure member is in its closed position.
References Cited in the le of this patent UNITED STATES PATENTS 922,455 Carstens May 25, 1909 1,037,073 Sonnemann Aug. 27, 1912 1,469,625 Dodge Oct. 2, 1923 1,508,495 Bacharach Sept. 16, 1924 1,511,825 Burns Oct. 14, 1924 1,591,314 Huddle July 6, 1926 1,901,683 Weidman Mar. 14, 1933 1,980,064 Johnston Nov. 6, 1934 2,235,386 Rueckert Mar. 18, 1941 2,238,849 Kastberg Apr. 15, 1941 2,250,974 Stoddard July 29, 1941 2,395,747 Loeb Feb. 26, 1946 2,551,305 Tompkins May 1, 1951 2,576,982 Walker Dec. 4, 1951 2,647,528 Borngesser et al. Aug. 4, 1953
US321692A 1951-11-24 1952-11-20 Dishwashing machine Expired - Lifetime US2824567A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3210144A (en) * 1963-12-10 1965-10-05 Mullins Mfg Corp Dishwasher drip guard
US3489317A (en) * 1967-11-22 1970-01-13 Fuller Co Apparatus for assisting material flow
US3665943A (en) * 1969-03-18 1972-05-30 Whirlpool Co Dishwasher
US3807420A (en) * 1972-05-15 1974-04-30 Westinghouse Electric Corp Dishwasher drying system
US5518014A (en) * 1995-02-21 1996-05-21 Mceachen; Peter C. Portable countertop dishwasher
EP1882427A1 (en) * 2006-07-25 2008-01-30 Electrolux Home Products Corporation N.V. Vertical kitchen fixture unit
US20130334940A1 (en) * 2010-08-06 2013-12-19 Electrolux Home Products Corporation N.V. Table top dishwasher
US8752914B1 (en) 2011-09-13 2014-06-17 Tali Simhoni Dish rack mounted in kitchen cabinet

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US1469625A (en) * 1921-05-02 1923-10-02 Carrie E Dodge Dishwashing machine
US1508495A (en) * 1922-01-07 1924-09-16 Eric W Bacharach Dishwasher
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US1901683A (en) * 1927-03-29 1933-03-14 John H Weidman Mechanical dishwasher
US1980064A (en) * 1928-03-31 1934-11-06 Hobart Mfg Co Washing machine
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US2238849A (en) * 1939-02-21 1941-04-15 Jamestown Metal Equipment Comp Washing apparatus for dishes, silverware, and the like
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US2551305A (en) * 1946-08-24 1951-05-01 Gen Electric Kitchen cabinet
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US922455A (en) * 1908-06-24 1909-05-25 Charles Carstens Dish-washer.
US1037073A (en) * 1912-02-09 1912-08-27 Frederick Sonnemann Dish-drainer.
US1511825A (en) * 1919-08-04 1924-10-14 Walter G Burns Dishwasher
US1469625A (en) * 1921-05-02 1923-10-02 Carrie E Dodge Dishwashing machine
US1591314A (en) * 1921-06-13 1926-07-06 Wiley J Huddle Cabinet dishwasher
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US1980064A (en) * 1928-03-31 1934-11-06 Hobart Mfg Co Washing machine
US2238849A (en) * 1939-02-21 1941-04-15 Jamestown Metal Equipment Comp Washing apparatus for dishes, silverware, and the like
US2235386A (en) * 1940-02-15 1941-03-18 Westinghouse Electric & Mfg Co Dishwasher construction
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3210144A (en) * 1963-12-10 1965-10-05 Mullins Mfg Corp Dishwasher drip guard
US3489317A (en) * 1967-11-22 1970-01-13 Fuller Co Apparatus for assisting material flow
US3665943A (en) * 1969-03-18 1972-05-30 Whirlpool Co Dishwasher
US3807420A (en) * 1972-05-15 1974-04-30 Westinghouse Electric Corp Dishwasher drying system
US5518014A (en) * 1995-02-21 1996-05-21 Mceachen; Peter C. Portable countertop dishwasher
EP1882427A1 (en) * 2006-07-25 2008-01-30 Electrolux Home Products Corporation N.V. Vertical kitchen fixture unit
US20130334940A1 (en) * 2010-08-06 2013-12-19 Electrolux Home Products Corporation N.V. Table top dishwasher
US9138124B2 (en) * 2010-08-06 2015-09-22 Electrolux Home Products Corporation N.V. Table top dishwasher
US8752914B1 (en) 2011-09-13 2014-06-17 Tali Simhoni Dish rack mounted in kitchen cabinet

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