Title:
IMPROVEMENT IN THE WASHING TUB OF A CLOTHES WASHING MACHINE
Document Type and Number:
WIPO Patent Application WO/1995/017543
Kind Code:
A1
Abstract:
Clothes washing machine provided with a washing tub made of plastic material and comprising a rear wall (2), a passing-through hub (3) provided at the centre of said rear wall and inserted in its central hub-holding portion (4) for supporting the bearing (7) used to support the central shaft (5) of the drum (6), wherein said hub includes a first perimetral sleeve (8) adapted to be inserted from inside the tub, the outer cylindrical edge thereof being adapted to engage against the inner edge of said cylindrical central hub-holding portion (4), a second sleeve (9) capable of being inserted from outside the tub into the inner cylindrical cavity of said first sleeve, the outer edge thereof being adapted to engage, preferably in a screw-like manner, against the inner edge of said first perimetral sleeve (8). Said first perimetral sleeve is provided with a flange (10) having its projecting rim abutting against the inner wall of the tub, while said second sleeve (9) is provided with a flange (11) having its projecting rim abutting against the outer wall of the tub.
Inventors:
DURAZZANI PIERO (IT)
Application Number:
PCT/EP1994/003941
Publication Date:
June 29, 1995
Filing Date:
November 28, 1994
Export Citation:
Assignee:
ZANUSSI ELETTRODOMESTICI (IT)
DURAZZANI PIERO (IT)
DURAZZANI PIERO (IT)
International Classes:
D06F37/00; D06F37/26; (IPC1-7): D06F37/00; D06F37/26
Foreign References:
| EP0026018A1 | 1981-04-01 | |||
| DE9215811U1 | 1993-02-18 | |||
| EP0043429A1 | 1982-01-13 | |||
| CH395914A | 1965-07-31 |
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Claims:
CLAIMS
| 1. | Clothes washing machine, particularly of the household type, provided with a washing tub made of plastic material and comprising a cylindrically shaped peripheral envelope, a rear wall (2), a circular front wall, and a passingthrough hub (3) arranged at the center of said rear wall and inserted in the central hubcarrying portion (4) of said rear wall, said hub carrying in a per se known manner the bearing (7) provided to support the central shaft (5) of the drum (6), characterized in that said hub consists of a first perimetral sleeve (8), which is capable of being inserted from inside the tub and whose outer cylindrical rim engages the inner rim of said cylindrically shaped central hubcarrying portion (4), a second sleeve (9), which is capable of being inserted from outside the tub into the inner cylindrical cavity of said first sleeve and whose outer rim engages the inner rim of said first perimetral sleeve (8), said second sleeve (9) being adapted to support said bearing (7) . |
| 2. | Clothes washing machine according to claim 1, characterized in that said first perimetral sleeve is provided with a flange (10) abutting against the inner wall of the tub, whereas said second sleeve (9) is provided with a flange (11) abutting against the outer wall of the tub, a ringshaped sealing gasket means (12) being arranged in correspondence of the inner curvature between said second sleeve and its flange (11). |
| 3. | Clothes washing machine according to claim 2, characterized in that said second sleeve is adapted to be inserted into said first sleeve by screw engagement between appropriate corresponding threads provided on the outer surface of said first sleeve and the inner surface of said second sleeve. |
| 4. | Clothes washing machine according to claim 2 or 3, characterized in that full tightening of said second sleeve into said first sleeve causes said respective flanges (10, 11) to become clamped against the surrounding central hubcarrying portion (4) of said tub. |
| 5. | Clothes washing machine according to any of the preceding claims, characterized in that in said first perimetral sleeve there are provided a plurality of slits (13) running in a parallel arrangement with respect to the axis of said first perimetral sleeve and extending substantially over the whole longitudinal dimension thereof. |
| 6. | Clothes washing machine according to any of the preceding claims, characterized in that a sawtooth profile (14) is arranged on the outer edge of the flange (11) of said second sleeve (9), and a corresponding ringnut portion (15), which is coaxial with said central hubcarrying portion, is joined to said rear wall and has its free end (16) provided with a plurality of teeth (17), said profile (14) and said ringnut portion (15) being sized and arranged so that the teeth (17) of said free end (16) automatically and elastically engage some of the saw teeth of said profile (14). |
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