FR2597893A3 - TANK WITH DOUBLE BOTTOM OF PLASTIC MATERIAL, IN PARTICULAR FOR WASHING MACHINES - Google Patents

Abstract

THE OBJECT OF THE INVENTION IS A TANK, IN PARTICULAR FOR A WASHING MACHINE, INCLUDING AN ANNULAR BODY, PREFERREDLY BUT NOT NECESSARILY IN PLASTIC MATERIAL, AND A BOTTOM RETURNED AND FIXED ON THIS ANNULAR BODY. AT CURRENT HOURS, IN ADDITION TO THE TANKS FOR WASHING MACHINES COMPLETELY MADE IN METAL SHEET, WE ALSO KNOW SINKS OF THE TYPE CONSTITUTING OF AN ANNULAR SHEET BODY AND A MOLD BASED IN PLASTIC MATERIAL FIXED ON THIS BODY, AS WELL AS TANKS CONTAINING AN ANNULAR BODY AND A MOLDED BOTTOM, BOTH OF PLASTIC MATERIAL, THIS BODY AND THIS BOTTOM BEING FIXED TO ONE ANOTHER. NORMALLY, THE BOTTOMS OF THESE TANKS, WHEN THEY ARE MADE OF PLASTIC MATERIAL, ARE CONSTITUTED OF A SINGLE ELEMENT WHICH IS HOWEVER SUBJECT TO DEFORMATION WHEN IT IS SUBJECT TO EFFORTS, BECAUSE IT MUST CARRY THE ROTATING BASKET. TO PREVENT THEIR DEFORMATION, THE BOTTOMS ARE EQUIPPED, AT LEAST OF THE REAR SIDE, WITH MOLDINGS OR RIBS OF STRENGTHENING WHICH, TO BE EFFECTIVE, MUST BE ROBUST AND CAUSE AS A CONSEQUENCE AN INCREASE IN THE WEIGHT OR THE OVERALL BOTTOM AND THEREFORE OF THE TANK AS A WHOLE. THEREFORE, THE PURPOSE OF THE PRESENT INVENTION IS TO CREATE A TANK MADE OF PLASTIC MATERIAL, IN PARTICULAR FOR WASHING MACHINES, HAVING A DOUBLE BOTTOM SHAPED BY TWO ASSEMBLED ELEMENTS WHICH ALLOW TO INCREASE MECHANICAL STRENGTH BY REDUCING DIMENSIONS AND THICKNESSES, THEREFORE, THE WEIGHT AND THE PRICE DEDIT FOND. TO THIS END, THE PRESENT INVENTION CONCERNS A PREFERRED PLASTIC TANK. NO APPLICATION IS PUBLISHED UNDER THIS NUMBER

Description

"Double bottom tank of plastic material in particular

for washing machines ".

  The subject of the invention is a vessel, in particular for washing machines, comprising an annular body, preferably but not necessarily a plastic material, and an attached base fixed on

said annular body.

  At present, in addition to the tanks for washing machines entirely made of metal sheet, there are also known tanks of the type consisting of an annular sheet body and a molded plastic base attached to said body, and that tanks having an annular body and a bottom

  molded, both of plastic material, the body 15 and the bottom being then fixed to one another.

  Normally, the bottom of these tanks, when they are made of plastic, are made of a single element which is however susceptible to deformation when it is subjected to ef20 forts, because it must carry the rotating basket.To prevent their deformations, the bottoms are provided, at least on the rear side, with moldings or stiffening ribs which, in order to be effective, must be robust and consequently lead to an increase in the weight or bulk of the bottom and

therefore of the tank as a whole.

  Accordingly, it is an object of the present invention to provide a plastic tub, especially for washing machines, having a double bottom formed of two assembled members which can increase the mechanical strength by reducing the dimensions and thicknesses as well as as a result,

the weight and price of the said fund.

  For this purpose, the present invention relates to a tank preferably made of plastic material,

15 20

  in particular for washing machines, which comprises an annular body and an attached base and fixed on said annular body, characterized in that the bottom consists of two complementary molded plastic elements, coupled in the axial direction and fixed one on the other, the two assembled elements having, on the periphery, means for their attachment to the annular body of the vessel and, in the center, a support hub of the rotating bearing shaft associated with the vessel.

  An example of practical realization of

  the invention will be better understood with reference to the description below by referring to the attached drawings, in which:

  - Fig.1 is a partial sectional view which shows the elements constituting the bottom of the tank separated from one another;

  - Fig.2 shows, still in partial section, the assembled tank.

  The represented tank has a body

  annular molded 1, for example plastic, and a bottom 2 made as a component and then attached to said annular body.

  According to the invention, the bottom 2

  consists of two complementary elements 3,4 an inner element and an outer element, these two elements being molded plastic and assembled together.

  The inner element 3 comprises a wall intended to constitute the actual bottom of the tank, while the outer element 4 has a wall 6 located at a distance from that of the inner element and constituting an added bottom. At the center of its wall 5, the inner member 3 has a tubular hub 7 for coupling in the axial direction with a corresponding annular zone 1 to the corresponding annular zone 8. planned in the center of wall 6 of

the outer element 4.

  The two elements 3,4 additionally have on their opposite faces moldings or ribs 3 'and 4' intended to come into coincidence when the two elements are coupled in the axial direction (see FIG. 2) and then fixed together by welding or by snapping, with screws or rivets or with

  other suitable systems for forming a double bottom.

  At the periphery, at least the inner element 3, but preferably the two elements 3,4 comprise a flange 9 by which the two elements, once assembled to constitute the double bottom, 15 are fixed on the annular body 1 to complete

  the tank by means of appropriate organs.

  The bottom thus formed is particularly robust and has a high mechanical strength. It is thus possible to make both

  elements that constitute it with relatively limited thicknesses to reduce overall dimensions, weight and also price.

  Furthermore, the bottom is not subject to any particular deformations whatever the load to which it is subjected and the directions of the forces involved to ensure a more correct and safe support and operation of the rotating basket associated with the tank. The shaft of this basket is mounted using

  of bearings in the central hub of the double bottom.

1 I

@ 0; FRENCH REPUBLIC

NATIONAL INSTITUTE

OF INDUSTRIAL PROPERTY

PARIS

2,597,894

  This issue did not result in any publication 1.e s 1 e M6

Claims (3)

  1. Tank, in particular for washing machines, comprising an annular body (1), preferably but not necessarily plastic, and a bottom (2) attached and fixed on said annular body, characterized in that the bottom (2) is consisting of two complementary plastic molded elements (3,4), coupled in axial direction and fixed to one another, the two assembled elements comprising, on the periphery, means (9) for fixing them on the annular body of the tank and, in the center, a hub (7) supporting the rotating bearing shaft associated with the tank.   20. Tank according to claim 1, charac- terized in that one of the two elements (3) comprises a first wall (5) intended to constitute the actual bottom of the tank and having a central tubular hub (7), the another element (4) having a wall (6) located at a distance from the first (5) and intended to form an auxiliary bottom, this second wall having a central annular zone (8) which couples along the same axis with the tubular hub (7) of the first element (3), moldings or ribs (3 ', 4') which come into coincidence when the two elements are assembled, being provided between the facing faces of the two elements (3,4).   3. Tank according to any one of claims 1 and 2, characterized in that the two elements (3,4) constituting the bottom are fixed one   on the other and the annular body (1) of the tank by welding. 1 and elements (3,4) Tank according to any one of claims 2, characterized in that the two constituting the bottom (2) are fixed to one another and to the annular body (1) of the tank by cloting.    . Tank according to any one of Claims 1 to 4, characterized in that the two elements (3, 4) constituting the bottom (2) are   attached to each other and to the annular body of the tank by mechanical organs.