US 2967024 A
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Description (OCR text may contain errors)
Jan. 3, 1961 I M, c, AUBERT 2,967,024
DISH WASHING MACHINE Filed March 23, 1959 F INVENTOR United States Patent msn WASHING MACHINE jlVlich'eljClaude Aubert, Geneva, Switzerland, assignor to ';Frame vS.A., Fribourg, Switzerland, '21 corporation of *SWitzerl-and Filed Mar. '23, 1959, Ser.-No. ;801,362 Claims priority, application Switzerland Apr l, 195s 8 Claims. (Cl. 239-4261) There exist dish washing machines ;which comprise a conduit having an oscillating free end and another: end
"fitted on a support with a vertical shaft andmounted on passage forming the above-mentioned'conduit, a tipat the lower end of the-said conduit, andmeans-urgingthe said body to rotate about :its own axiswhen the said :passage is traversed by water under pressure in that there is provided o-nthe base membera conical seat for receiving the tip and bringing the water underpressure 1 to the said conduit: and in that there is provided a ring :carried by the base member and forming a lateral supportand a runway for the oscillating body, to maintain the said body inclined, the natural rotation of the oscillating body under the action of the water causing it to rollon the said lateral support, whereas the axis of the said bodydescribes a cone.
The attached drawing shows, by way of-example, .an embodiment of the dish washing machine according to the present invention.
Figure 1 is a view'in partial vertical section.
Figure 2 is a detail view in partial section along 2-2 of Fig. 1.
The machine shown comprises a fixed support 40, with a vertical axis, secured by screwing on a base member not shown and itself secured relative to the structure of the machine. The said support is traversed axially by a passage 41 for the supply of water under pressure. At the upper end of the said passage 41, there is disposed in the support 40 a member 42, for example of synthetic material similar to rubber and known in the trade under the name of Teflon. The said member constitutes a conical seat, seen at 43.
A metallic member of annular shape 44 is disposed at a certain distance above the support 40 to which it is connected by metallic arms 45, preferably slightly elastic. The inner part 46 of the annular member 44 thins out, as is to be seen in Fig. 1.
An oscillating body 47 having a form of revolution is traversed longitudinally by a longitudinal passage 48. The lower end of the said conduit forms a tip 49 with a spherical head resting on the conical seat 43. The conduit 48 thus communicates with the water supply passage 41; the spherical shape of the tip 49 and the conical one of the seat 42 ensure sufficient watertightness between the said two elements, so that practically all the water entering at 41 must pass into 48.
The oscillating body 47 rests freely against the inner part 46 of the annular member 44, so that its axis is inclined to a certain extent relative to the vertical, as is seen in the drawing. The upper part of the body 47 2,967,024 Patented Jan. 3, 1961 ice is constituted by a cap '50 having ;an outer annular groove 51-provided to-cooperate with the part 46. The 'said'groove has a lower part 52 ofconical shape widening downwardlyand by means ofwhich the body 47, 50 bears ,against' the ring 44.
The-cap*50"is pierced with a certain number-(four in the example'shown-)--of-outletpassages 53, 54,55, 56,-by which the longitudinal passage *48 communicates with the outside. It will be seen that the said outlet passages are unequally-inclined relatively to the axis of the body 47,550. The axis of the passage-53 is situated in a radial plane-of the body 47, 50. The passages 54, 55, '56 are disposed tangentially relatively to the longitudinal passage 48, as see'n-in Fig. 13, so that each of them constitutes 'an arm of a'hydraulic Whirl.
, The operation of the machine shown in the following: The body 47, "50 being in place, as is to be seen in Fig. 1, when the water under pressure arrives by 41, it
enters into 48, and thenleaves the body by the outlet passages 53, 54,55, '56. 'The water entering into those of the outlet passages which form the arms of the hydraulic whirl, urges, through well-known reaction effect,
the body 47, 50 to rotate about its own axis, exactly in 'the manner of a hydraulic jwhirl. Nothing prevents this rotational movement and the body 47, 50 then rolls on the part '46'of thering 44, as a result of the said rotation -56 is then projected into the part of the inside of the machine where are to befound'the table utensils. As a result of the said rolling motion of the body 47, 'SiL-the axis of the said body'describes a cone, and as a result of the different inclinations of the outlet passages relative to the axis of the said body, a sweeping of all the region where are to be found the table utensils to be washed is effected. The tangential disposition of certain of the outlet passages relative to the longitudinal passage '48 has for efiect that-the water adopts, inside the said outlet passages, awhirling movementand issues from the said passages in the form'of a divergingzlayer. --w.ater will;issu e from 53. in theformof a, jet, whereas it Thus,
will issue from 54, 55,56 in the form of more or less atomized diverginglayers. The inclination of the conduit 53 will be chosen such that during the conical oscillating movement of the body 47, 50, the water which issues from said passages will douse relatively heavy table utensils, such as plates, whereas the water issuing from the other outlet passages will be directed towards lighter and more fragile utensils, such as cups or saucers, for example.
The angle of the apex of the cone 52 is provided larger than the angle of the apex of the cone described by the axis of the body 47, 50. The result of this disposition is that, during the rotation of the said body, the vertical component of the centrifugal force of the body 47, 50 acting on the part 46 of the ring 44 will be directed downwards and is consequently opposed to the axis of the said body approaching the vertical and abandoning contact with the ring. The said conical surface 52 thus acts in cooperation with 46 in order to maintain the body 47, 50 in contact with the ring 44 and ensure satisfactory watertightness between 42 and 49. The said body is thus obliged to roll on the part 46. The weight of said body is moreover adequately chosen so as to ensure satisfactory wate'rtightness between 42 and 49, when starting up. To sum up, the vertical component, above mentioned, of the centrifugalforce, adds its action to that 3 of the weight, in order to maintain the said watertightness.
A certain elasticity of the arms 45 is advantageous in order to permit of absorbing, at least to a certain extent, the effect of the inertia forces transmitted to the machine under the action of the movement described of the mass 47, 50. To this end, another elastic mounting of the ring 44 on the machine might be adopted. I
The ratio between the radii of the contact circles of the body 47, 50 and the-ring 44, will be advantageously chosen other than a whole number or a simple fraction. In fact, if one considers any point on the axis of one of the outlet passages 53, S4, 55, 56, it describes a certain curve situated on a spherical surface and similar to a hypocycloid. If the ratio under consideration is a whole number or a simple fraction, this means that the said curve closes on itself and repeats itself by superposition, after a small number of conical oscillations of the body 47, 50 about the vertical axis of the system. In order to obtain a distribution as homogeneous as possible of the water in the space, and consequently a good washing, it is necessary that the said ratio be such that the curve only closes on itself after a number of oscillations as high as possible of the body 47, 50. A ratio equivalent to an irrational number would give a curve which would never close.
It will be seen that the described construction ofiers the following advantages: The body 47, 50 may be removed and set up without any mechanical operation, which is useful for cleaning and to ensure instantaneous interchangeability. Indeed, it may be interesting to dispose of a set of bodies such as 47, 50 differing one with the other by the disposition of the outlet passages, each of said bodies producing a difierent washing. Thus, one such body could produceintense and concentrated jets, for washing kitchen utensils heavy and difficult to wash, another such as described above and a third only producing atomized jets, in order to clean articles which are delicate and easily cleaned, such as glasses.
What I claim is:
1. A washing machine spray producing apparatus, comprising a base having a water supply conduit therethrough, an oscillating body having a conduit therethrough, a tip member having an axial conduit therethrough and a receiving member having a conical recess therein with an axial bore therethrough opening into the apex of the conical recess, said conical recess receiving said tip member therein, one of said members being on said base and the other member being on said oscillating body, and a ring on said base around said oscillating body against which said oscillating body rests in an inclined position, and means on said oscillating body over the end of the conduit therethrough at the end of said oscillating body remote from said base for directing liquid therethrough for causing said oscillating body to roll on said ring, whereby the axis of said oscillating body describes a cone.
2. Apparatus according to claim 1, characterized in that the oscillating body has an outer annular groove provided to cooperate with the above-mentioned ring and ensure that the said body be held in contact with it.
3. Apparatus according to claim 2, characterized in that the groove has a conically shaped lower part widening downwards and through which the said body bears against the above-mentioned ring, the angle at the apex of the said cone being larger than the angle at the apex of the cone described by the axis of the said body.
4. Apparatus according to claim 1, in which said means has a plurality of outlet passages by which the said conduit through said oscillating body communicates with the outside, the said outlet passages being unequally inclined, relatively to the axis of the oscillating body, so as to ensure an extensive sweeping by the water which issues from the said body.
5. Apparatus according to claim 1, in which said means has at least one outlet passage disposed substantially tangentially to the periphery of the cone described by said body, so that the water therein assumes a whirling movement and in the form of a diverging layer.
6. Apparatus according to claim 1, characterized in that the ratio between the contact radii of the oscillating body and the ring is a number other than a whole and a simple fraction.
7. Apparatus according to claim 4, characterized in thatat least one of the said outlet passages is arranged substantially tangentially to the periphery of the cone described by said body to form the arm of a hydraulic whirl.
8. Apparatus according to claim 1, characterized in that the ring is connected to the structure through the agency of elastic means.
References Cited in the file of this patent UNITED STATES PATENTS lama-ante