US2852030A - Dishwashing machines - Google Patents

Description

S. G. NORD DISHWASHING MACHINES sept. .16, 1958 3 Sheets--Sheerl 1 Filed June 22, 1954 INVENTOR 5 VEN GUSTAF NORD.

ATTORNEY.

Sept. 16, 1958 s. G. NORD 2,852,030`

JDIsHwAsHING MACHINES F1e`d June' 22. 1954 3 Sheets-Sheet 2 FIG. 5.

INVENTOR SVEN GUSTAF NORD.

ATTORNEY.

Sept. 16, 1958 s. G. NORD '2,852,030

DIsHwAsHING MACHINES l Filed June 22, 1954 s sheets-sheet s` FIG. IO.

INVENTOR SVEN GUSTAF NORD.

` ATTO NEY.

'United States The present invention relates to a dishwashing machine of the type in which the objects to be washed are sprayed with water or cleansing liquid.

It is the main `object of the present invention to provide a dishwashing machine which is simple and effective and may be placed on or above a draining-board or the like and which is of a shape which offers advantageous conditions for the placing and spraying of the dishes.

It is another object of the present invention to provide a dishwashing machine or apparatus which ihas a vertical and horizontal wall and is readily placed with the vertical wall against the kitchen wall and with its horizontal wall either against the cupboard or against the base of the kitchen equipment, depending upon the position of the dishwashing machine.

It is still another object of the present invention to provide a dishwashing machine which comprises a casing substantially of a configuration one half of a diagonally divided parallelepiped, adapted to be placed on a draining-board or to be fastened in such a way under a cupboard projecting above the draining-board, and in which the diagonal or sloping side forms the front wall of the casing, which is hinged at `one of its edges, preferably at its upper edge to the adjacent wall and can at least to its greater part be folded up and locked in its open position. The front wall `is substantially square and a water motor is movable adjacent to or along the inside of the front wall and supported at its center on the front wall while the vanes move in a circular path parallel to the wall and adapted for spraying the dishes from the front side. By this arrangement a Water motor having the largest possible diameter can be used. The dishes can be sprayed additionally through a number of spraying holes disposed in a line, preferably situated near the apex of the angle between the back Wall and the bottom plane or as an alternative the top plane. The washing machine with small modifications especially in respect to the shelves carrying the dishes can be used vright side up, in which case the bottom wall is usually disposed on a draining-board where the opening or folding up of the front wall is not interfered with by projecting deep cupboards. The washing machine can be used secondly in inverted or upside down position, and is then placed with the bottom wall adjacent the bottom plane of a cupboard, projecting above the draining-board, Where also the front wall of the cupboard has a vertical position.

With these and other objects in view, which will become apparent in the following detailed description, the present invention will be clearly understood in connection with the accompanying drawings, in which:

Figure l is a schematic, perspective view of the dishwashing machine in an upright position;

Fig. 2 is a perspective view of another embodiment of the dishwashing machine in inverted position;

Fig. 3 is a perspective view of the machine disclosed atent 2 in Fig. 1, the front and side walls being in open position;

Fig. 4 is a vertical section through the machine disclosed in Fig. 2, the front wall being in open position;

Fig. 5 is a front elevation of the machine, the front Wall `being in open position, and indicating the dish shelves;

Fig. 6 is a vertical section through the `machine disclosed in Fig. 5;

Figs. 7 and 8 are fragmentary views vto indicate the edge supports for plates; l

Fig. 9 is a perspective view of the dishwashing machine in inverted position indicating its relation to a cupboard and to a sink;

Fig. l0 is a vertical section through the dishwashing machine in inverted position indicating the water feed connections as well as the drain connections; and

Fig. l1 is an axial section through the Water feed connector.

The dishwashing machine according to the present invention, and in particular as shown in Fig. 1, comprises a casing having dish shelves on which the dishes which are to be Washed can be placed. This casing has substantially the form of a pentahedron, more especially defined by the form of one slightly truncated half of a diagonally divided parallelepiped with a bottom wall 1, a back wall 2, a sloping frontwall 3 and two substantially triangular side walls 4 and 5. The wall surface 12 and 12', which may be suitably made of dilferent sizes, truncate the edge portion of the casing. The walls 1, 2 and 4 are rigidly connected to each other at their edges, and form at the corner 6 (Fig. 1) substantially right angles relative to each other. The casing is adapted to be placed on the draining-board in a kitchen, suitably in a corner so that the casing walls 2 and 4 are close to, or against the corresponding kitchen Walls.

The sloping front wall 3 is connected to the projection 12 of the back wall 2 by means of hinges 7 so that it can be opened. Further the substantially triangular side Wall 5 is connected by means of hinges 8 to the wall surface projecting forwardly from the back wall 2, so that it can be swung open relative to this wall. The back wall 2 forms a corner 9 with the side wall 4 and another corner 11 with the bottom wall 2, while the latter forms a corner 10 with the side wall 4.

The casing may be made of any suitable material, and it is preferable to have at least one of its external side surfaces, e. g. the front wall 3, of a transparent material, e. g. suitable glass or plastic, so that it is possible to observe the dishes during the cleansing process.

The casing which is liquid tight has an outlet tube 18 projecting from the bottom wall 1, or an outlet tube 18 if the horizontal wall is in inverted position, which outlet tube may be connected with a kitchen drain in conventional manner.

A linkage 13, Fig. 3, disposed between the triangular lixed side wall 4 and the movable front wall 3 maintains the latter in open position. This linkage 13 holds in itsy 3 may be swung up beyond its vertical position and is then` abutting against the kitchen Wall or a cupboard, in Which case the linkage can be released. In this way the casing will take up a minimum of space when it is not in use and thus the surface of the draining-board may be used for other purposes. The dishes can, as mentionedabove, be placed on the bottom or on shelves inside the casing. For this purpose two frames 14 and 15 are fastened to the back wall 2 (Figs. 5 and 6). The frames 14 and 15 may be fastened by screws or the like means to the back wall 2. Dish shelves 16 and 17 are placed on or secured to the frames 14 and 15 and at least the upper shelf 17 can be folded up against the back wall 2 by means :of a hinge or other suitable means, if the dishwashing machine is not used for storing of dishes. In its lower position it can rest on projecting pins 19 fastened to the side walls 4 and 5 (Fig. 3). The lower shelf 16 can engage the bottom wall 1 by means of `a downwardly extending projecvtion'fz. The lower shelf is further pro'- vided with a longitudinal support 21 which is capable of being -folded up;v In case the embodiment of Vthe dishwashing machine in inverted position is used, the shelves may be arranged as disclosed in Fig. 4. The uppermost shelf 26 is suitably hinged in this case by means of hinges 27 to the upper wall of the casing. Obviously, all the dish shelvesinay be formed and arranged in any conventional manner.

All the dish shelves may in conventional manner be' formed as gratings with parallel bars stretching in the transverse direction.

For spraying the dishes either water or a solution of suitable cleansing means may be used. For this purpose a centrally supported rotatable liquid sprayer 24 and 26 or water motor 37 (Fig. 5*), is provided which rotates in a plane substantially parallel to the sloping front wall 3, and in order to increase the eiect of the sprayer, it is possible to provide an additional pipe 29 provided with spraying holes 28, especially in the corners of the front wall. The pipe 29 is connected to a hose extending through the front wall 3, for feeding liquid to said pipe 29. The sprayer comprises a tube 24 to which cleansing liquid is supplied under pressure through the supply tube to the hollow joint 2S by means of a hose 48 connected to the latter and to a faucet 49, respectively. A rotary hub and valve member secured to the outer face of the frontV wall provides the feeding from the tube 24 to the water motor (Fig. ll). The pipe 29 extends from the supply tube to the vspray holes in the corners of the front side and may be shut o ff by a valve 29. Proper slots (not shown) may be arranged in the side wall in order to permit closing of the front wall 3. At the side of the f tube 24 facing the dish shelves spray holes 26 are provided, some of which are slightly oblique so that they develop a rotary momentum on the tube 24. The turning effect is suitably enhanced by providing some of the holes substantially 90 spaced apart from the other spray holes and preferably placed near the hub. The distances between the circles which the openings or jets 26 describe, wihen the sprayer turns, are suitably diminishing in a geometrical series in the direction towards the ends of the tube, and the circles following each other are dened by openings or jets situated, alternating on each side of the rotation axis and in this way a comparatively even spraying of the dishes is obtained, the dishes being hit by the same quantities of liquid per time unit.

Liquid may `be supplied from a water line to a branch line 3|) in such away that the liquid reaches simultaneously all the spray holesinside the machine or only one of the branch lines at a time. The branch line 30 is preferably disposed at the rear of the casing of the apparatus, and may be rotatable about its longitudinal axis, making approximately 1A of a revolution, by means of a coupling 38. The openings are arranged in the most suitable way, preferably in an oblique upward direction towards the at side of the plates, or other dishes. The openings directed almost straightly upwards will clean the inside of the dishes, glasses or the like, which are placed on the upper shelf. The liquid sprays provided by means of the pipes 29 will assist in cleaning dishes placed on the front part of the lower shelf 16. The branch line 30 may perform an oscillating rotating movement upon its own axis by means of a suitable conventional drive and this movement may also be performed manually or the position of the line changed, e. g. manually. In the simplest way the branch line 30 is formed by stationary 0r unmovable tubes provided with spray holes.

Figs. 7 and`8 Ishow the edge supports for the plates or other dishes, which supports are formed 'by parallel wavy ridges 36 formed in plate members and consisting of elastic material such as rubber, and they are so placed relative to each other that the plates 35 of a normal thickness can be clamped between one of the ridges 36 by engagement with the valve 32 on one side of the plate 35 and two adjacent waves 33 and 34 -of another ridge 36 on the opposite side of the plate 35.

The lower shelf 16 in the upright position of the machine (Fig. 6) corresponds with'the middle shelf in its inverted position (Fig. 4) and the shelf 26 is disposed thereabove in the front part of the machine in the latter case.

Obviously, the specific forms of my invention described herein for the purpose of disclosure and to illustrate the principles involved will quite certainly suggest to those skilled in the art various further changes, modifications and substitutions that do not depart from the scope of the invention, and while I have disclosed several embodiments of the present invention, it is to be understood that these embodiments are given by example only and not in a limiting sense, the scope of the present invention being determined by the objects and the claims.

Having now described my invention what I claim as new and desire to secure by Letters Patent is:

l. A dishwashing machine comprising a casing having a rear wall, side Walls, a top wall, a bottom wall, both said last mentioned walls being of substantially rectangular configuration and one fof said last mentioned walls having a greater dimension from front to rear than the other of said last mentioned walls, and a front Wall extending substantially from said top wall to said bottom wall and also Yfrom one of said side walls to the other of said side walls and said front wall 4being disposed in inclined position and having atransverse dimension substantially equal .to the distance 4between top and bottom of said front 'having a dimension substantially equal to 'the distance between top and bottom of said front wall, in order to cleanse dishes disposed in said casing when said front wall is in closed position.

2. The dishwashing machine, as set forth in claim l, which includes a plurality of supports to receive dishes to be cleansed and projecting from the rear wall of said casing and a plurality of ridges secured to said rear wall and disposed above each of said supports in order to receive the edges of the dishes to be cleansed.

3. A dishwashing machine comprising a casing having a rear wall, side walls, a top wall, a bottom wall, both said last mentioned walls being of substantially rectangular conliguration and one of said last mentioned walls having a greater dimension from front to rear than the other of said last mentioned walls, and a front wall extending substantially from said top wall to said bottom wall and also from one of said side walls to the other of said side walls and said front wall being disposed in inclined position and having a transverse dimension substantially equal to the distance between top and bottom of said front wall, and hinge means secured adjacent to the top of said front wall in order to permitof swinging of the latter in upward direction, and a rotatable liquid ysprayer disposed adjacent the inner face of said front wall and having its center of rotation at the middle of said front wall, the outer end of said sprayer dening an imaginary circle of a diameter substantially equal to said transverse dimension of said front wall, in order to cleanse dishes disposed in said casing when said front wall is in closed position.

4. A dishwashing machine comprising a casing having a rear wall, side walls, a top wall, a bottom wall, both said last mentioned walls being of substantially rectangular configuration and one of said last mentioned walls having a greater dimension from front to rear than the other of said last mentioned Walls, and a front Wall extending substantially from said top wall to said bottom Wall and also from one of said side Walls to the other of said side Walls and said front wall being disposed in inclined position and having a transverse dimension substantially equal to the distance between top and bottom of said front wall, and hinge means secured adjacent one of the edges of said front Wall, in order to permit of swinging of the latter along said one of the edges of said front Wall, and a rotatable liquid sprayer disposed adjacent the inner face of said front Wall and having its center of rotation at the middle of said front Wall, the outer end of said sprayer delining an imaginary circle of a diameter substantially equal to said transverse dimension of said front wall, in order to cleanse dishes disposed in said casing when said front Wall is in closed position.

References Cited in the le of this patent UNITED STATES PATENTS Coiin Mar. 23, Rogers Mar. 12, Lee Jan. 23, Green Oct. 18, Thiriot Oct. 23, Burns Oct. 14, Clarkson Apr. 30, Blakeslee Apr. 30, Marbury May 28, Olson Apr. 28, Fullerton Apr. 15, LeGore June 3, Guglielmoni Nov. 6, Stanitz Nov. 18, Spitzer Mar. 24,

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