US3049391A - Dishwashing apparatus - Google Patents

Dishwashing apparatus Download PDF

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Publication number
US3049391A
US3049391A US109578A US10957861A US3049391A US 3049391 A US3049391 A US 3049391A US 109578 A US109578 A US 109578A US 10957861 A US10957861 A US 10957861A US 3049391 A US3049391 A US 3049391A
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Prior art keywords
doors
machine
lever
chamber
door
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Expired - Lifetime
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US109578A
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English (en)
Inventor
David A Meeker
Gerald B Fox
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Hobart Manfacturing Co
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Hobart Manfacturing Co
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Publication date
Priority to NL278301D priority Critical patent/NL278301A/xx
Application filed by Hobart Manfacturing Co filed Critical Hobart Manfacturing Co
Priority to US109578A priority patent/US3049391A/en
Priority to FR897332A priority patent/FR1324565A/fr
Priority to BE617565A priority patent/BE617565A/fr
Priority to GB18242/62A priority patent/GB1003903A/en
Application granted granted Critical
Publication of US3049391A publication Critical patent/US3049391A/en
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0076—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals
    • A47L15/0081—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals with vertical sliding closing doors, e.g. hood-type dishwashers
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D13/00—Accessories for sliding or lifting wings, e.g. pulleys, safety catches
    • E05D13/10—Counterbalance devices
    • E05D13/12—Counterbalance devices with springs
    • E05D13/1207—Counterbalance devices with springs with tension springs
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/32—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing
    • E06B3/34—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing with only one kind of movement
    • E06B3/42—Sliding wings; Details of frames with respect to guiding
    • E06B3/44—Vertically-sliding wings
    • E06B3/4423—Vertically-sliding wings disappearing in a wall pocket; Pockets therefor
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/30—Application of doors, windows, wings or fittings thereof for domestic appliances
    • E05Y2900/304—Application of doors, windows, wings or fittings thereof for domestic appliances for dishwashers

Definitions

  • FIG-11 also 240 250 AA T 240 "22e l 48A .”245 s 243 l 235 ,”237 m 'NMI 55@ "wlnlllwm i 2z7. ⁇ 50 n ,-237 1, i :zzz
  • the present invention relates to dishwashing apparatus, and particularly to improvements in dishwashing machines having a chamber with one or more vertically movable doors providing access to the chamber for the loading and unloading7 of articles to be cleansed, especially dishes, trays, and the like carried in supporting racks.
  • the present invention has for its primary objective an improved control mechanism which governs the opening and closing of the door or doors of the machine, including a simple arrangement which will counterbalance the door in raised open position while not interfering with maintaining the door in closed position.
  • straight through machines and corner machines there are two most common types of constructions in machines of this nature, hereinafter referred to as straight through machines and corner machines.
  • This language is descriptive of the manner in which the machine is installed and used, since in the straight through machine it is usual to have entrance and exit doors at opposite sides of the machine, preferably opening and closing together, whereby the loaded racks of dishes can be pushed onto supporting rails in the chamber through the entrance door and the rack of cleansed dishes can be pushed or pulled through the opposite exit door onto a table or the like. The ilow of the articles to be cleansed is thus straight through the machine from one side to the other.
  • the chamber is placed in a corner of the room or against other equipment, and the entrance and exit doors are on adjacent sides such that the ilow of articles and racks is through the machine at right angles. Again, these doors on adjacent sides are preferably raised and lowered simultaneously by the same mechanism.
  • the principal object of this invention is the provision of a novel control and operating mechanism for such doors of the dishwashing machine, the principles of such mechanism being applicable to either type of machine, and being capable of' execution by mechanism which is uncomplicated in construction and thus durable, inexpensive to manufacture, and requiring practically no maintenance.
  • Another object of the invention is to provide such a door control mechanism which is constructed within the established dimensional confines of the machine, and which thus does not interfere with the installation of the machine in space presently allocated to machines of this type.
  • a further object of this invention is to provide a novel door operating and counterbalancing mechanism for dishwashing machines in which a coil tension spring is elective to maintain the door or doors in raised open position, while not interfering with the placement and continued positioning of the doors in lowered closed position.
  • An additional object of this invention is to provide such a control mechanism including a generally U-shaped lever pivotally mounted on the machine such that it provides control arms extending adjacent to the door or doors of the machine and a central or operating portion on the opposite side of the pivot axis, and having a pivotal connection through a balance link with an elongated coil tension spring, the arrangement being such that the force exerted by the spring is directed closer to the pivot axis "ice when the doors are closed than when they are opened, providing an increased moment from the spring force in the open position suicient-to hold the doors inf-the open position.
  • Another object of the invention is to provide such a'- control mechanism wherein either of the control arms provides a convenient operating handle which can be grasped by the operator to raise and lower the doors'V simultaneously.
  • Another feature of this invention relates to the provi-l sion of a dishwashing machine of the type described above having a vertically enlargedchamber.
  • CertainV articles are considerably oversized, and in particular one article which requires cleansing, and which cannot be accommodated in a standard size machine, is a so-called hotel tray.
  • This is a metal tray used for carrying aV number of servings, and the trays vgenerally are elliptical in form, having a major diameter of between 27y and ⁇ 28 inches and a minor diameter in the order ofI 22 ⁇ to 23 inches.
  • a machine isp'rovid'ed having a chamber elongated vertically suicient to accommodate articles of this type wit-h the larger dimension arranged vertically, for example by stacking a number of such trays in a rack.
  • the machine embodies the novel door control and operating mechanism as set forth above, and in addition the doors are provided with auxiliary panels hinged to their lower ends and movable outwardly from the main portion of the doors to provide a larger opening to the interior of the machine.
  • this machine can be operated in the normal manner, with the auxiliary door panels merely hanging vertically from the main portion of each door.
  • a further object is to provide such a machine in which the auxiliary door panels are automatically opened and closed during opening and closing of the main doors.
  • Another object of the invention is to provide such an arrangement for 'lan oversized machine wherein the door ⁇ control mechanism includes -an interlock arrangement operable to ⁇ align the auxiliary door panels properly when the doors are moved to their closed position, assuring' proper sealing of lthe washing chamber before the washing Yand rinsing spray mechanism is actuated.
  • FIG. 1 is a side elevational View, with certain parts broken away, showing one type of dishwashing machine embodying the n'ovel door control and operatingV mechamsm;
  • FIG. 2 is a front view of the machine shown in FIG. 1, as viewed from the right of FIG. l
  • FIG. 3 is an enlarged detail section taken on line 3--3 of FIG. 1 through la portion of the corner of the inachin'e, showing the manner in which the doors are mounted for vertical movement;
  • yFIG. 4 is a view from the top of FIG. l, sho-wing the general outline ⁇ of the door control mechanism;
  • FIG. Su is a view similar to FIG. l, showing the limits of movement of the doors and control mechanism, with the device shown in open position in full lines and" in closed position by the dotted lines;
  • FIG. 6 is an enlarged detail section taken on line 6 6 in FIG.
  • FIG. 7 is an enlarged sectional View of the pivot mounting of the control lever, taken online 7-7 in FIG. 5
  • FIG. 8 is an enlarged detail section taken on line 8 8 in FIG. 4;
  • FIGS. 9 and 10 are, respectively, top plan and partial side elevation views of a modified form of the invention, illustrating the application of -the control mechanism to a machine having adjacent entrance and exist doors;
  • FIG. 1l is a side view similar to FIG. 1, showing another modified form of the invention, incorporating a vertically enlarged chamber, and movable auxiliary door panels;
  • FIG. l2 is a View similar to FIG. 11 with the door in its open position and the auxiliary panel raised;
  • FIG. 13 is a View from the rear of the machine shown in FIGS. l1 and 12, in other words looking from the left of such figures, with the doors in raised position and with one of the auxiliary door panels raised, illustrating the manner in which oversize articles can be loaded and unloaded;
  • FIG. 14 is an enlarged detail section taken on line 14-14 in FIG. 1l, showing the relationship ⁇ between the auxiliary door panels and the main door track;
  • FIG. l5 is an enlarged detail section taken on line 15-15 in FIG. 11, showing the interlock arrangement between the auxiliary door panel and the control arm;
  • FIGS. 16 and 17 are enlarged sectional views of a modified arrangement by which the auxiliary door panels are raised and lowered automatically;
  • FIG. 19 is a View showing -a similar modified form to that shown in FIGS. 16-18;
  • FIG. 2O is an enlarged detail section of lthe hinging construction for the auxiliary door panels.
  • the dishwashing machine includes a base section indicated by the general reference numeral 10, mounted on legs 11.
  • This section of the machine includes a tank for washing liquid, la pump for recirculating the wash liquid from the tank through the wash arms 12, a drive motor for such pump, and suitable plumbing connections for supplying rinse liquid to -the lower spray head 13 and the upper spray head 14.
  • a tank for washing liquid for a tank for washing liquid
  • la pump for recirculating the wash liquid from the tank through the wash arms 12
  • a drive motor for such pump
  • suitable plumbing connections for supplying rinse liquid to -the lower spray head 13 and the upper spray head 14.
  • suitable plumbing connections for supplying rinse liquid to -the lower spray head 13 and the upper spray head 14.
  • the cleansing chamber of the machine is the general area between the aforementioned spray heads, and tracks 17 are mounted in this chamber providing support for the dish carrying racks which are loaded manually thereinto.
  • either side may be considered the entrance and the opposite side the exit, this being the straight through embodiment of the machine las mentioned previously.
  • the chamber is enclosed by a back wall 20 and a top 22, and at the front corners of the chamber, projecting up from the base structure 10, there are elongated angle pieces (FIG. 3) which form the mountings for outer track defining corner pieces or angles 26. These parts are secured in predetermined relation by screw fasteners 27, with spacers 28 therebetween maintaining the desired spacing.
  • the rear wall 20 of the machine is formed inward at 29 and is also connected to an outer angle member 26 at each of the rear corners to form similar tracks.
  • These tracks form mountings for side doors 30 and 32, and also in this particular embodiment for a front access door 33.
  • the doors 30 and 32 are designed to move vertically and simultaneously within the tracks, and are guided for this purpose by turned edges 34 which maintain the doors in the tracks during such movement.
  • the front access door 33 also is provided with such guiding edge portions 34, but it has a separate handle 35 for manual grasping to move the access door independently. Normally it is opened only for inspection, cleaning, and other maintenance.
  • the control mechanism provided by this invention for simultaneous opening and closing of the doors 30 and 32, and also for counterbalancing these doors to hold them in the raised open position is constituted by an operating lever indicated by the general reference numeral f 40.
  • This lever as can be seen in FIG. 4, is of generally U-shape, and thus includes control arms 42 and 43, preferably parallel, which extend adjacent these doors, and preferably terminating short of the front edge of the doors, as shown in FIGS. l and 5, such that the arms do not protrude beyond the front of the machine.
  • the base or central drive arm portion 45 of the control lever provides a drive arm to which the force is applied for counterbalancing the doors.
  • the stud 53 and bearing sleeve 55 extend through an aperture 58 in the control arm 40, and also into an outer knob 60, being received in a bore 62 within the knob.
  • the lever 40 extends through a cross bore 63 in the knob.
  • each pivot mounting being aligned across the machine, defining a pivot axis
  • the control arms 42 and 43 which can be considered as those portions of lever 40 extending forward of the pivot axis, are arranged to swing about such pivot axis in one direction, while the drive arm portion 45 swings in the opposite direction.
  • the direction of rotation of these parts with respect to the pivot axis is of course the same in either direction, but when a point on the control arm is moving downward a point on the drive arm is moving upward.
  • Control links 62 and 63 are connected between the arms 42 and 43 and the doors 30 and 32 respectively for accommodating swinging movement of the arms to the linear movement of the doors.
  • link 62 has a pivotal connection 64 to arm 42 and a separate pivotal connection 65 to a point on door 30.
  • the connection 64 is spaced inwardly somewhat from the end of the control arm and the free end of the arm thus forms a convenient handle for grasping by the operator.
  • link 63 has a pivotal connection 67 with the arm 43 and a pivotal connection 68 with a point on door 32.
  • the control mechanism provided by this invention also affords a reliable and maintenance free counterbalance arrangement.
  • the compensating force is preferably provided by one or more relatively long coil tension springs 70.
  • the lower end of the spring or springs 70 is anchored to a fixed point on the machine, as by the eye bolt 72 shown at the lower end of the spring in FIG. l. Since, as noted previously, the usual practice is to provide the flue on the machine, or to allow space for it, a convenient arrangement has ⁇ been found in locating the spring or springs on opposite sides of this flue, as shown in FIG. 4 particularly, and the entire structure can be enclosed within a suitable housing piece 74. This piece not only encloses the springs but also provides some insulating space between adjacent walls and the fiue 15.
  • the spring or springs 70 are relatively long and are preferably ofthe type known in the art as low-rate springs. Thus, the effective force exerted by such springs when they are stretched a relatively short 4distance in comparison to their length can be considered as essentially constant. Any other apparatus for exerting a substantially constant compensating force can be used within the concept of the invention, but the long low-rate coil tension springs illustrated and described have been found effective and economical for this purpose.
  • the compensating force exerted by the spring or springs is transferred to the central portion or drive arm 45 of the operating lever through a balance link 75, there being one such link for each spring used.
  • This link may be merely an elongated rod having hooked por-tions at its opposite ends, as shown particularly in FIGS. l and 5.
  • the balance link isy hooked or otherwise connected to spring 70, and at its upper end there is a pivotal connection with the central portion 45 of the control lever.
  • This connection is preferably in the form of a hook shaped piece ⁇ 80, in the general form of a question mark as shown in FIG.
  • a locating pin 84 is inserted through the arm, and normally the member 80 rests against the side of the pin, free to rotate about Ithe arm portion 45.
  • the relationship of the parts is such that the turning moment exerted by the spring means through the balance link 75 is increased as the lever 40 is swung in a direction to raise doors and 3'2. It is seen in F'IG. 5 that with the doors lowered, in the dotted line position, the balance link 75 is fairly close Ito the pivot axis of the control lever, and as the doors raise the pivotal connection provided by the part 8'0 rotates in the opposite direction to movement of the central lever portion or arm about the pivot axis, thus carrying ythe balance link 75 outwardly from the lever pivot axis and effectively increasing the component of the 4force from spring 70 which acts upon the system.
  • FIGS. 9 and l() show the manner in which the present invention is adapted to a corner type of machine, which was described briefly at the outset of this specification. Many of the parts are identical, or quite similar, to the parts described in connection with the aforementioned embodiment. Therefore, the same reference numerals in the one hundred series are applied to similar or identical parts.
  • the machine includes a base 110, portions of which are shown in FIG. l0, and the back 12) ⁇ and top .122 of the machine cooperate with the doors and 132, and the fixed side wall 133, to define the ⁇ washing chamber.
  • the outer corner pieces or angles 126 are shown at each corner of the machine, and it will be noted that those of the corner pieces which are adjacent to the movable doors 130 and 132 include inwardly turned edges cooperating with the outwardly turned edges 134 on these doors to form guide tracks.
  • the control lever includes arms 142 and 143 which extend downwardly adjacent to the doors 130 and 132 respectively.
  • These arms are also curved around the corners of the machine and extend upwardly at an angle to the central or drive arm portion 145, and the extent of these arms, which are preferably formed from a single -rod or tube, is determined by the pivot axis which is defined by the mounting studs 153 on the respective arms.
  • These studs include an inner segment 154 of reduced diameter, received in a bearing sleeve 155 which is in turn mounted within a stationary socket 157.
  • the socket extends from a mounting flange 158, and these flanges are secured to the walls 126 and 133 in aligned relation, as shown particularly in FIG. 9, to define a pivot axis through the corner of the machine opposite to that corner at which the doors 13G and 132 adjoin.
  • a compensating spring is mounted within the housing 174 at the rear of the machine, and anchored at its lower end in the same manner as previously described, and shown in FIG. 1.
  • the upper end of this spring is secured to the balance link 175, which in turn extends upwardly to a pivotal connection with a bracket or arm 182 fixed to the drive arm portion 145.
  • the balance link includes an offset section 176 which provides for clearance between this link and the central arm portion 145 of the control lever to provide for movement of the balance link away from the pi-vot axis as the doors are raised.
  • control and counterbalancing is achieved in the same manner by this mechanism, with the single compensating spring 17) being selected of such force and rate that it will maintain the doors in raised open position, but will be ineffective to move the doors from the lowered or closed position without application of some external yforce by the operator.
  • FIGS. 11-15 illustrate a further modification of the invention, and again a number of like or simila-r parts are designated by similar references, where possible, here in the two hundred series.
  • FIGS. 11-15 illustrate a further modification of the invention, and again a number of like or simila-r parts are designated by similar references, where possible, here in the two hundred series.
  • the base structure 210 of the machine provides a support for the chamber and the spray apparatus (not shown), and the chamber includes a back wall 220 and a top 222 which cooperate, in this configuration, with a fixed front wall shown generally at 233 to define the elongated chamber.
  • the chamber includes a back wall 220 and a top 222 which cooperate, in this configuration, with a fixed front wall shown generally at 233 to define the elongated chamber.
  • the base structure 210 of the machine provides a support for the chamber and the spray apparatus (not shown), and the chamber includes a back wall 220 and a top 222 which cooperate, in this configuration, with a fixed front wall shown generally at 233 to define the elongated chamber.
  • At the corners are the same type of track constructions, including the inturned parts 229 of rear wall 220 (FIG. 14) and the outer angle members 226 fixed thereon and forming the guide tracks for the main door panels 230 ⁇ and 232.
  • Door panels 230 and 232 cover, in their lowered position shown in FIG. ll, only a fraction of the total exit and entrance openings to the chamber of the machine, and the remainder of these openings is covered by auxiliary door panels 235 and 236, having hinge connections 237 to the main door panels 230 and 232, respectively.
  • the auxiliary door panels include guiding and bathing members 23S at their opposite sides (FIG. 14) and the hinge connections preferably are fixed to the lower edges of the main door panels somewhat above the turned back lower edge of the main door panel, particularly as shown in FIG. 19, forming a ⁇ baiing arrangement which essentially prevents leakage of the liquid around the auxiliary door panels when they are closed.
  • auxiliary panels Since the auxiliary panels swing outwardly in this fashion, they must of course be less in width than the track dimension for the main door panels, and the auxiliary panels thus terminate at their opposite sides short of the outer guiding or corner and track forming angles 226. This relationship is shown on a larger scale in FIG. 14. Accordingly, since the lower end 239 of the auxiliary panels descends beyond the edge of the base 210, particularly as shown in FIG. 1l, to form a bafiiing arrangement at this point, it is necessary to assure the complete closing movement of the auxiliary panels against the interior parts before the doors are fully closed.
  • a convenient grip 250 can be attached to the arm extension part 247 for grasping by the operator, and by locating the grip in this manner, the operators hands will be placed away from possible pinching between the cam plate and the extended arm portion as he manipulates the door control mechanism.
  • control mechanism for the doors operates in the same manner as previously described, and accordingly further detailed description is unnecessary. It might ⁇ be noted, however, that the machine can operate with conventional or normal exit and entrance openings merely by raising and lowering the main door panels with the mechanism provided, without speciiic attention to the auxiliary door panels, and these auxiliary panels are swung open to enlarge the access openings only when oversize articles are to be cleansed in the machine.
  • FIGS. l6-18 Another feature of the invention resides in an arrangement for opening the previously described auxiliary door panels automatically each time they are raised, and also for assuring that they are automatically and properly closed as the doors are lowered.
  • a suitable arrangement of this kind is shown in FIGS. l6-18, wherein only those portions of the main and auxiliary door panels and adjacent parts are illustrated. Reference numerals in the three hundred series are used to designate like or similar parts to those previously described.
  • the ⁇ main door panel 330 has a hinge connection 337 with auxiliary door panel 335 such that the two panels raise and lower simultaneously, while the auxiliary panel can hinge outwardly, particularly as shown in FIG. 17 to provide the enlarged access opening to the chamber of the machine.
  • the automatic control apparatus includes an arm 340 fixed to the interior of door panel 335, and offset to extend around the hinge connection in the closed position, as shown in FIG. 16.
  • At the inner end of arm 340 there is a counterweight 342, and this structure can be duplicated at both sides of the auxiliary door panel if desired.
  • the total mass of counterweight is selected to be slightly less than the mass of the auxiliary door panel 335.
  • the counterweight substantially balances the auxiliary door panel, it is not quite effective to cause swinging movement of the auxiliary panel independent of additional guiding mechanism, but it docs function to minimize the operating force required by such guide mechanism.
  • the guide and control mechanism for the auxiliary door panel is in the form of a curved double sided track 345 secured to a wall of the machine, for example to the back wall 320 as shown.
  • a roller 347 on arm 340 engages within the track, and thus determines the swinging motion of lever 340 as the auxiliary door panel is raised and lowered. When it is raised, the roller follows the curved track 345 and the auxiliary panel 335 automatically swings open.
  • the roller and track cooperate to cause a closing swinging motion of the auxiliary door panel
  • the track includes an extending straight section 343 which contains the roller as the door is lowered, and maintains the auxiliary panel flush -against the guide tracks for the main door, assuring that the lower edge of the auxiliary panel drops within the ⁇ base structure 310, as shown in FIG. 16.
  • the track and roller controls can be applied to either or both auxiliary door panels if desired, and they can be duplicated on both sides of the auxiliary door panels if necessary, although in most instances one track and one roller will sufhce to move the counterweighted auxiliary door panel.
  • FIG. 19 is another ⁇ form of auxiliary door panel interlock.
  • This mechanism may if desired include a provision ⁇ for opening the auxiliary door panel automatically when the door is raised, or this feature may be omitted and the auxiliary panel then opened only manually.
  • the counterweight 3412 is an optional feature in the construction. If it is used, as shown, then 'it will be of such mass that it is slightly heavier than the door panel (or if two are used their total mass will overbalance door panel 335). Therefore, when the door is raised ⁇ the counterweight will cause roller 347 to follow the rail 350 and the auxiliary panel will open as it -approaches its raised position.
  • the auxiliary panel 335 will remain hanging vertically until the operator grasps the handle 352 and opens the auxiliary panel.
  • the roller 347 and track 350 function as an interlock mechanism, similar to the cam 248 shown in FIGS. l1 and l5, to assure that the door panel 335 is closed against the door tracks before the entire door is completely lowered. This assures proper positioning of the lower edge of door panel 335 as it passes into the base structure.
  • a dishwashing machine having walls defining a closed chamber and means in said chamber for ilowing cleansing liquid over articles supported therein together with vertically movable doors providing :access to the in- 'terior of said chamber
  • the combination of counterbalance control mechanism for holding said doors in their raised open position comprising an operating lever including control arms extending adjacent said doors, a pivot mounting for said lever secured to said mach-ine and forming an laxis about which -said control arms can swing, links having pivotal connections at their opposite ends with said door and the adjacent said control arm respectively :for accommodating swinging movement of said arms to linear motion of said doors, compensating spring means anchored at one end to ya fixed point on said mach-ine, a balance link connected to t.e other end of said spring means and having a pivotal connection with said lever located above said laxis in the closed position of said doors, said balance link being rotatable about its said pivotal connection with said lever in a direction opposite to swinging movement of said lever during opening movement of said doors acting
  • a dislrWashing machine having Walls defining a closed chamber and means in -said chamber for flowing cleansing liquid over articles supported therein together with .a vertically movable entrance and exit doors providing access to the interior of said chamber, the combination of counterbalance control mechanism for holding said -doo-rs in raised open position comprising an operating lever including -a control arm extending adjacent to said doors, a pivot mounting 4for said lever secured to said machine and ⁇ form-lng an axis about which said con-trol arm can swing, links having separate pivotal connections with said doors and the adjacent said controly arm for accommodating swinging movement of said i arms to linear moti-on of said doors, a drive arm on said lever extending from said pivot mounting a substantially lesser -distance than said control arms and outwardly ⁇ from said axis in the ⁇ opposite direction from said arms, ya compensating means mounted at the rear of said machine, and balance link means connected to said compensating means and having a pivotal connection ⁇ with said drive
  • a dishwashing machine having Wall means defining a chamber and spray means for flowing cleansing liquid over article-s supported in said chamber, ent-rance and exit doors on said chamber through which the articles are loaded and unloaded, means mounting said doorsy for vertical opening and closing movement, contro-l mechanism for said doors including a common operating lever having control arms extending adjacent each of said doors, a pivot mounting for said lever secured to said wall means and ⁇ forming an axis about which said lever swings during operation of said control mechanism, link means pivotal-ly connected to each of -said doors and to the respective adjacent control arms yfor accommodating swinging movement ⁇ of said arms to linear opening and closing motion of said doors, compensating spring means anchored to a fixed point on said machine, drive arm means fixed'to said lever and extending therefrom in the opposite direction from said pivot mounting with respect to said control arms, and vbalance linkage connected to said spring means and having a pivotal'connection with said drive arm means such that the force exerted by spring means tend-ing to open -s'aid doors
  • a dishwashing machine having' means including front and back walls defining a chamber and sjgi'ray-v means for flowing cleansing liquid over articles supported in said chamber, entrancel and exit doors on opposite sides of said chamber through which the articles are loaded and unloaded, means mount-ing said doors for ⁇ vertical opening and closing movement, control mechanism for said doors including a generally U-shalped operating lever havinga central portion and control arms projecting ⁇ along said doors and terminating adjacent to each of said doors, a pivot mounting for said lever on said machine forming an axis extending along said back wall about which said armsk and -said centralportion swing in opposite vertical directions during operation of said control mechanism, link means pivotallyv connected t ⁇ o ⁇ each of said doors and to the respective adjacent control arms for accommodating swinging movement of said arms' to linear motion of said doors, a pair of compensating springs anchored to xed points on said machine, and balance linkage connected to each of said springs and having pivotal connections with said central portion of said lever such that the force exerted by said
  • a dishwashing machine having means including a back wall and a iixed side Wall defining a chamber adapted for placement in :a corner and spray means for flowing cleansing liquid 1over articles Vsupported in said chamber, entrance and exit doors on the other adjacent'l sides of said chamber through which thel articles are"v loaded ⁇ and unloaded, means mounting said doors for Vertical opening and closing movement, control mech- ⁇ anism for said doors including a common operating'lever having a central portion and control arms extending around said back wall and ixed side wall and terminating adjacent each of said doors, a pivot mounting for said lever secured to said back wall and fixed side Wall and forming an axis about which said arms and central portion ⁇ swing in opposite directions during operation ofi said control mechanism, link means pivotally connected to each of said doors and to the respective adjacentv control varms for accommodating swinging movement of said arms to linear motion of said doors, and counterbalance means operatively connected to said centralportion of said lever for counterbalancing said doors.
  • a dishwashing machine having means includingl a back wall and a fixed side wall defining a chamber adapted for placement in ya corner and spray means for flowing cleansing liquid over articles supported in said chamber, entrance and exit doors on the other adjacentv sides of said chamber through which the articles are" said lever secured to said back wall and fixed side wallV and forming an vaxis yabout which said arms and'central portion swing in opposite directions during operationy of said control mechanism, link means pivotallyr connected'- to each of said doors and to the respective adjacent control arms for accommodating swinging movement of said arms to linear motion of said doors, counterbalance means mounted along said back wall and providing a downward acting force at the rear of said machine, and a balance link connected to said counterbalance means and having a pivotal connection with said central portion of said lever such that the force exerted by said counterbalance means on said lever in the closed position of said doors is insufficient to lift said doors and is increased in the open position of said doors sufiiciently to operate as a counter balance holding said doors in their open position.
  • a dishwashing machine having wall means defining a chamber and spray means for iiowing cleansing liquid over articles supported in said chamber, main entrance and exit doors on said chamber through which the articles are loaded and unloaded, means mounting said doors for vertical opening and closing movement, control mechanism for said doors including a common operating lever having control arms extending adjacent each of said doors, a pivot mounting for said lever secured to said wall means and forming an axis at the rear of the machine about which said lever swings during operation of said control mechanism, link means pivotally connected to each of said doors and to the respective adjacent control arms for accommodating swinging movement of said arms to linear motion of said doors, spring means anchored to a fixed point on said machine, balance linkage connected to said spring means and having a pivotal connection with said lever such that the force exerted by said spring means tending to open said doors is so directed in the closed position of said doors as to be insufiicient ot lift said doors and the force derived from said spring means is sufiiciently greater in the open position of said doors to function as
  • a dishwashing machine having walls defining a chamber and spray means for flowing cleansing liquid over articles supported in said chamber, main entrance and exit doors on said chamber through which the articles are loaded and unloaded, means mounting said doors for vertical opening and closing movement, control mechanism for said doors including a common operating lever having control arms extending adjacent to each of said doors, a pivot mounting for said lever secured to said wall means and forming an axis about which said lever swings during operation of said control mechanism, link means pivotally connected to each of said doors and to the respective adjacent control arms for accommodating swinging movement of said arm to linear motion of said doors, spring means anchored to a fixed point on said machine, balance linkage connected to said spring means and having a pivotal connection with said lever such that the force exerted lby said spring means tending to open said doors is so directed in the closed position of said doors as to be insufhcient to lift said doors and the force derived from said spring means is sufiiciently ⁇ greater in the open position of said doors to function as a counterbalance holding
  • a dishwashing machine having means defining a chamber and spray means for owing cleansing liquid over articles supported in said chamber, an access door arranged for vertical movement on said chamber providing access to the interior thereof, said door being divided into a main door panel and an auxiliary door panel pivotally mounted on the lower edge of said main door panel, means supporting said door for simultaneous vertical movement of said door panels between ⁇ open and closed positions, said pivot mounting of said auxiliary door panel providing for further opening movement thereof to enlarge the access opening for passage of oversize articles therethrough, means for raising and lowering said auxiliary door panel with respect to said main door panel, and interlock mechanism acting on said auxiliary door panel in response to closing movement of said main door panel to assure alignment of yboth said door panels prior to complete closing thereof.
  • a dishwashing machine having means defining a chamber and spray means for flowing cleansing liquid over articles supported in said chamber, an access door arranged for vertical movement on said chamber providing access to the interior thereof, said door #being divided into a main door panel and an auxiliary door panel pivotally mounted on the lower edge of said main door panel, means supporting said door for simultaneous vertical movement of said door panels between open and closed positions, said pivot mounting of said auxiliary door panel providing for further opening movement thereof to enlarge the access opening for passage of oversize articles therethrough, means for raising and lowering said auxiliary door panel with respect to said main door panel, and automatic control mechanism connected to open and close said auxiliary door panels with a hinged movement relative to said main door panel during opening and closing movement of said main door panel.
  • a dishwashing machine having a tank
  • means forming a four-sided washing chamber over said tank including a back wall, another normally closed wall, and track means defining entrance and exit openings through the other two walls into said chamber, entrance and exit ⁇ doors movable vertically in said track means providing for loading and unloading of articles into and out of said chamber, and spray means in said chamber for iiowing cleansing liquid over ⁇ articles supported therein when said doors are in closed position
  • control mechanism for raising and lowering said doors simultaneously and for holding said doors in their raised open position including a unitary operating ⁇ lever extending around the back of said chamber having control arms extending adjacent each of said doors and terminating adjacent the respective said doors, means forming a pivot mounting for said lever defining a horizontal pivot axis for said lever, link means pivotally connected to each of said doors and to the respective adjacent control arm for accommodating swinging movement of said lever and said arms to vertical linear motion of said doors, drive arm means formed as a fixed part of said operating lever and extending outwardly on
  • counterbalance means extending along said back wall of said machine and providing an essentially constant counterbalance force, and rbalance linkage connected at one end to said counterbalance means and having a pivotal connection at its other end to said drive arm means, said pivotal connection being located above said pivot forming means such that the turning moment exerted Iby said counterbalance means through said balance linkage on said operating lever is insufcient to lift said doors from their lowered closed position and increases as said doors are opened by an amount sufiicient to enable said counterbalance means to retain said doors in their raised open 75 position.
  • control mechanism Afor said doors including a common generally U-shaped operating lever having a central portion extending across said back wall and having control arms extending adjacent each of said doors terminating short of said front wall, means -forming a piv-ot mounting for said lever defining a horizontal pivot axis parallel to said back wall about which said Iarms swing during operation ⁇ of said control mechanism, link means pivotally connected to each of said doors and to the respective adjacent control arm kfor accommodating swinging movement of said arms to vertical linear motion of said doors, drive arm means formed as a iixed part of said operating lever and extending outwardly on 4the opposite side of said axis
  • control mechanism for raising and lowering said doors simultaneously and for holding said doors in their raised open position including a unitary oper-ating lever having control arms extending adjacent each of said doors and terminating more adjacent the respective said doors to form handles for grasping by an operator adjacent either said door, means forming a pivot mounting for said lever defining a horizontal pivot axis for said lever, link means pivotally connected to each of said ⁇ doors and to the respective adjacent control arm for accommodating swinging movement of said arms to vertical linear motion of said doors, dn've arm means formed as a fixed part of said operating lever and extending outwardly on the opposite side of said axis from said iarms to rotate with said lever during opening and closing movements of said doors, counterbalance means extending along said back Wall

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Washing And Drying Of Tableware (AREA)
US109578A 1961-05-12 1961-05-12 Dishwashing apparatus Expired - Lifetime US3049391A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL278301D NL278301A (enrdf_load_stackoverflow) 1961-05-12
US109578A US3049391A (en) 1961-05-12 1961-05-12 Dishwashing apparatus
FR897332A FR1324565A (fr) 1961-05-12 1962-05-11 Machine à laver la vaisselle
BE617565A BE617565A (fr) 1961-05-12 1962-05-11 Machine à laver la vaisselle
GB18242/62A GB1003903A (en) 1961-05-12 1962-05-11 Improvements in or relating to dishwashing machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US109578A US3049391A (en) 1961-05-12 1961-05-12 Dishwashing apparatus

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US3049391A true US3049391A (en) 1962-08-14

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US109578A Expired - Lifetime US3049391A (en) 1961-05-12 1961-05-12 Dishwashing apparatus

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US (1) US3049391A (enrdf_load_stackoverflow)
BE (1) BE617565A (enrdf_load_stackoverflow)
GB (1) GB1003903A (enrdf_load_stackoverflow)
NL (1) NL278301A (enrdf_load_stackoverflow)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3246938A (en) * 1963-11-18 1966-04-19 Tore H Noren Mechanism for holding dishwashing machine door closed and for raising door
US3279874A (en) * 1963-11-18 1966-10-18 Tore H Noren Mechanism for holding dishwashing machine door closed and for raising door
US3589787A (en) * 1969-11-12 1971-06-29 Alco Standard Corp Dishwasher door operator
US3680940A (en) * 1969-11-18 1972-08-01 Rolf Johansson Ventilating arrangement in dish washing machines
DE2651616A1 (de) * 1975-11-17 1977-05-26 Hobart Corp Vorrichtung zum spuelen von tabletts
US4811997A (en) * 1988-02-19 1989-03-14 Hoshizaki Electric Co., Ltd. Dishwasher
WO1991005506A1 (en) * 1989-10-17 1991-05-02 Arne Alvemarker Dish washing machine with a vertically movable door blade
WO1997009921A1 (en) * 1995-09-12 1997-03-20 Premark Feg L.L.C. Collapsible door for a warewasher
US5927616A (en) * 1997-09-04 1999-07-27 Premark Feg L.L.C. Quick change rinse arm for warewasher
US6375175B1 (en) * 1999-07-09 2002-04-23 Winterhalter Gastronom Gmbh Lifting mechanism
US20090031848A1 (en) * 2005-04-27 2009-02-05 Hoshizaki Denki Kabushiki Kaisha Dishwashing machine
US9763554B2 (en) 2012-02-14 2017-09-19 Premark Feg L.L.G. Warewash machine with removable rotating arm and related method
US10631706B2 (en) 2014-10-27 2020-04-28 Illinois Tool Works Inc. Rinse arm system for warewasher
CN111132592A (zh) * 2017-08-14 2020-05-08 伊利诺斯工具制品有限公司 器皿清洗机和相关罩构造
US11122957B2 (en) 2017-12-21 2021-09-21 Illinois Tool Works Inc. Warewash machine with vapor extraction unit
US11963649B2 (en) 2017-12-21 2024-04-23 Illinois Tool Works Inc. Warewash machine with vapor extraction unit

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Publication number Priority date Publication date Assignee Title
BE544096A (enrdf_load_stackoverflow) * 1955-02-12
US1067084A (en) * 1913-06-04 1913-07-08 Frank F Wandtke Grain-car door.
US1073554A (en) * 1912-06-26 1913-09-16 Reilly W Zeller Fire-door.
US1366072A (en) * 1918-04-04 1921-01-18 Booth Electric Furnace Co Furnace-door
US1539170A (en) * 1919-09-24 1925-05-26 Surface Comb Co Inc Door-operating mechanism
USRE22206E (en) * 1942-10-20 Mechanism for imparting rectilinear

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE22206E (en) * 1942-10-20 Mechanism for imparting rectilinear
US1073554A (en) * 1912-06-26 1913-09-16 Reilly W Zeller Fire-door.
US1067084A (en) * 1913-06-04 1913-07-08 Frank F Wandtke Grain-car door.
US1366072A (en) * 1918-04-04 1921-01-18 Booth Electric Furnace Co Furnace-door
US1539170A (en) * 1919-09-24 1925-05-26 Surface Comb Co Inc Door-operating mechanism
BE544096A (enrdf_load_stackoverflow) * 1955-02-12

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3246938A (en) * 1963-11-18 1966-04-19 Tore H Noren Mechanism for holding dishwashing machine door closed and for raising door
US3279874A (en) * 1963-11-18 1966-10-18 Tore H Noren Mechanism for holding dishwashing machine door closed and for raising door
US3589787A (en) * 1969-11-12 1971-06-29 Alco Standard Corp Dishwasher door operator
US3680940A (en) * 1969-11-18 1972-08-01 Rolf Johansson Ventilating arrangement in dish washing machines
DE2651616A1 (de) * 1975-11-17 1977-05-26 Hobart Corp Vorrichtung zum spuelen von tabletts
US4811997A (en) * 1988-02-19 1989-03-14 Hoshizaki Electric Co., Ltd. Dishwasher
WO1991005506A1 (en) * 1989-10-17 1991-05-02 Arne Alvemarker Dish washing machine with a vertically movable door blade
US5257638A (en) * 1989-10-17 1993-11-02 Arne Alvemarker Dish washing machine with a vertically movable door blade
WO1997009921A1 (en) * 1995-09-12 1997-03-20 Premark Feg L.L.C. Collapsible door for a warewasher
US5630438A (en) * 1995-09-12 1997-05-20 Premark Feg L.L.C. Collapsible door for a warewasher
US5927616A (en) * 1997-09-04 1999-07-27 Premark Feg L.L.C. Quick change rinse arm for warewasher
US6375175B1 (en) * 1999-07-09 2002-04-23 Winterhalter Gastronom Gmbh Lifting mechanism
US20090031848A1 (en) * 2005-04-27 2009-02-05 Hoshizaki Denki Kabushiki Kaisha Dishwashing machine
US9131825B2 (en) * 2005-04-27 2015-09-15 Hoshizaki Denki Kabushiki Kaisha Dishwashing machine
US9763554B2 (en) 2012-02-14 2017-09-19 Premark Feg L.L.G. Warewash machine with removable rotating arm and related method
US10307036B2 (en) 2012-02-14 2019-06-04 Premark Feg L.L.C. Warewash machine with removable rotating arm and related method
US10631706B2 (en) 2014-10-27 2020-04-28 Illinois Tool Works Inc. Rinse arm system for warewasher
CN111132592A (zh) * 2017-08-14 2020-05-08 伊利诺斯工具制品有限公司 器皿清洗机和相关罩构造
US10806323B2 (en) 2017-08-14 2020-10-20 Illinois Tool Works Inc. Warewash machine and related hood construction
CN111132592B (zh) * 2017-08-14 2023-06-23 伊利诺斯工具制品有限公司 器皿清洗机和相关罩构造
US11122957B2 (en) 2017-12-21 2021-09-21 Illinois Tool Works Inc. Warewash machine with vapor extraction unit
US11963649B2 (en) 2017-12-21 2024-04-23 Illinois Tool Works Inc. Warewash machine with vapor extraction unit

Also Published As

Publication number Publication date
BE617565A (fr) 1962-08-31
GB1003903A (en) 1965-09-08
NL278301A (enrdf_load_stackoverflow)

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