WO2000022220A1 - Cement counterweight, particularly for household electrical appliances - Google Patents
Cement counterweight, particularly for household electrical appliances Download PDFInfo
- Publication number
- WO2000022220A1 WO2000022220A1 PCT/EP1999/006597 EP9906597W WO0022220A1 WO 2000022220 A1 WO2000022220 A1 WO 2000022220A1 EP 9906597 W EP9906597 W EP 9906597W WO 0022220 A1 WO0022220 A1 WO 0022220A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- counterweight
- household electrical
- shell
- electrical appliances
- cement
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/26—Casings; Tubs
- D06F37/265—Counterweights mounted to the tub; Mountings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
Definitions
- This invention relates to a cement counterweight, particularly for household electrical appliances.
- Counterweights are known, used in household electrical appliances to counter-balance the weight of a door of the appliance which can project (over or dishwasher door when open, dishwasher basket when extracted, etc.) or to attenuate the effect of rotating eccentric masses (rotating washing machine drum).
- Known cement counterweights which are generally preferred to the more costly metal counterweights, generally consist of cast counterweights, pressed counterweights or counterweights enclosed in a plastic casing. Cast counterweights are obtained by filling suitable moulds with the cementitious mix in the fluid state. They have a reasonable surface finish, a satisfactory variability of obtainable shape and a fairly wide range of obtainable maximum density.
- Known pressed counterweights are obtained by pressing the cementitious mix in powder form (moist sand) in a mould. They thus require a shorter curing time, with consequently reduced handling problems, and also have a satisfactory mechanical compression strength which is little conditional on their maximum density, which can be high. Finally they have satisfactory dimensional constancy and have limited surface flash.
- Cement counterweights enclosed in a plastic casing are obtained by filling said casing with a fluid or dry material of suitable density.
- the resultant product is attractive, has a compact smooth outer surface, and a total absence of powder and small material fragments.
- these advantages they have a high production cost, a limited maximum density, a non-constant weight because of the difficulty of filling the plastic casing, poor or no adhesion between the plastic casing and the filling material, and finally mechanical characteristics which depend exclusively on the plastic casing.
- An object of the invention is to provide a cement counterweight, particularly for household electrical appliances, which has all the advantages of known cement counterweights, but eliminates those drawbacks which are jointly or separately present.
- Figure 1 is an exploded perspective view of a first embodiment of a counterweight of the invention
- Figure 2 shows it in its assembled state
- Figure 3 is an exploded perspective view of a second embodiment thereof
- Figure 4 is an exploded perspective view of a variant thereof for mounting in a dishwasher
- Figure 5 is a perspective assembled view thereof.
- the counterweight of the invention in the embodiment shown in Figures 1 and 2, comprises a plastic shell 2 of shape substantially corresponding to the shape of the counterweight to be obtained. It is open and is provided with ribs comprising undercuts and/or projections and enlargements the purpose of which is essentially to securely bind the cementitious material to it.
- the plastic shell 2 is positioned within a steel mould (not shown) provided with a cavity which perfectly houses said shell.
- the cementitious mix in powder form (moist sand) is fed into the shell positioned in this manner, and is then pressed to obtain a body 4 which perfectly adheres to the shell 2 to form a product of optimum mechanical characteristics after the cement is cured.
- the counterweight of the invention has a completely satisfactory surface finish, a considerably reduction in the formation of powder and/or fragments of cementitious material, no shape limitation, high mechanical compression and tensile characteristics, low or no sensitivity to impact, and constant mechanical characteristics with time, all as a result of just a few operations, together with considerable dimensional uniformity.
- plastics material enables a product to be obtained with sharp edges, unobtainable with cement alone, and also enables integral fixing members 6 to be formed for accessories such as pipes 8 and rubber components 10 of the appliance to which the counterweight is to be applied.
- a plastic counter-shell 12 can be coupled to the plastic shell 2 to completely isolate the cementitious body 4 from the outside.
- the counter-shell 12 can be fixed to the shell 2 by any traditional means, such as bonding or gluing, or by suitable fixing means applied from the outside or integrated into the shell 2 or into the counter-shell 12 to snap-engage each other.
- This embodiment adds to the advantages of the preceding embodiment the further important advantage of total elimination of powder and/or fragments of cementitious material.
- This product in which the cementitious body 4 is completely enclosed by the plastics material 2, 12 can also be obtained by firstly forming the body 4 with pressed cementitious material and then covering it with plastics material within a suitable mould.
- the counter-shell 12 is directly formed on that part of the household electrical appliance on which the counterweight is to be mounted.
- that part of the appliance would be a part of the tub 14 which houses the rotary drum.
- the counter-shell is transformed from a passive member into a member able to perform with said part 14 the active function for which said part is destined. It will be apparent that in this case the counter- shell 12 is obtained practically without any additional operation.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU60802/99A AU6080299A (en) | 1998-10-13 | 1999-09-08 | Cement counterweight, particularly for household electrical appliances |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITVE980041 IT1305246B1 (en) | 1998-10-13 | 1998-10-13 | COUNTERWEIGHT CONCRETE, PARTICULARLY FOR HOUSEHOLD APPLIANCES. |
ITVE98A000041 | 1998-10-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000022220A1 true WO2000022220A1 (en) | 2000-04-20 |
Family
ID=11424396
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1999/006597 WO2000022220A1 (en) | 1998-10-13 | 1999-09-08 | Cement counterweight, particularly for household electrical appliances |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU6080299A (en) |
IT (1) | IT1305246B1 (en) |
WO (1) | WO2000022220A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1182291A2 (en) * | 2000-08-18 | 2002-02-27 | Whirlpool Corporation | Front loader washing machine with a tub with balancing weights |
EP1270791A2 (en) * | 2001-06-21 | 2003-01-02 | Lg Electronics Inc. | Balance weight in drum type washing machine and manufacturing method thereof |
AU773918B2 (en) * | 2001-06-21 | 2004-06-10 | Lg Electronics Inc. | Balance weight in drum type washing machine and manufacturing method thereof |
EP1561852A1 (en) * | 2004-02-05 | 2005-08-10 | Electrolux Home Products Corporation N.V. | Counterweight for washing machine tub and method for the manufacture thereof |
EP1780326A1 (en) * | 2005-10-26 | 2007-05-02 | Gianfranco Piazzoli | A reinforcement for a counterweight for electrical household appliances, a counterweight incorporating said reinforcement and corresponding method of production. |
DE102006011734A1 (en) * | 2006-03-14 | 2007-09-20 | BSH Bosch und Siemens Hausgeräte GmbH | Household appliance with a tub |
ITAN20080034A1 (en) * | 2008-07-11 | 2010-01-12 | O M G Di Geminiani Gino | BATHTUB AND COUNTERWEIGHT SYSTEM FOR WASHING MACHINES |
US9211048B2 (en) | 2011-01-20 | 2015-12-15 | Whirlpool Corporation | Dampened pump assembly for a dishwasher |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2241251A (en) * | 1989-11-15 | 1991-08-28 | Zanussi A Spa Industrie | Laundry washing machine with ballasted tub |
EP0515874A1 (en) * | 1991-05-29 | 1992-12-02 | Zanussi Elettrodomestici S.p.A. | Process and apparatus for manufacturing a counterweight for washing machines and counterweight resulting therefrom |
EP0623436A1 (en) * | 1993-04-20 | 1994-11-09 | Stefano Pescatori | An article of manufacture suitable to be used as a balancing mass in machines and a process for the production thereof |
DE19639968A1 (en) * | 1996-09-27 | 1998-04-02 | Wilhelm Sedlmayr | Stabilisation weight for washing machines |
-
1998
- 1998-10-13 IT ITVE980041 patent/IT1305246B1/en active
-
1999
- 1999-09-08 WO PCT/EP1999/006597 patent/WO2000022220A1/en active Application Filing
- 1999-09-08 AU AU60802/99A patent/AU6080299A/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2241251A (en) * | 1989-11-15 | 1991-08-28 | Zanussi A Spa Industrie | Laundry washing machine with ballasted tub |
EP0515874A1 (en) * | 1991-05-29 | 1992-12-02 | Zanussi Elettrodomestici S.p.A. | Process and apparatus for manufacturing a counterweight for washing machines and counterweight resulting therefrom |
EP0623436A1 (en) * | 1993-04-20 | 1994-11-09 | Stefano Pescatori | An article of manufacture suitable to be used as a balancing mass in machines and a process for the production thereof |
DE19639968A1 (en) * | 1996-09-27 | 1998-04-02 | Wilhelm Sedlmayr | Stabilisation weight for washing machines |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1182291A2 (en) * | 2000-08-18 | 2002-02-27 | Whirlpool Corporation | Front loader washing machine with a tub with balancing weights |
EP1182291A3 (en) * | 2000-08-18 | 2003-08-27 | Whirlpool Corporation | Front loader washing machine with a tub with balancing weights |
EP1270791A2 (en) * | 2001-06-21 | 2003-01-02 | Lg Electronics Inc. | Balance weight in drum type washing machine and manufacturing method thereof |
AU773918B2 (en) * | 2001-06-21 | 2004-06-10 | Lg Electronics Inc. | Balance weight in drum type washing machine and manufacturing method thereof |
EP1270791A3 (en) * | 2001-06-21 | 2004-12-08 | Lg Electronics Inc. | Balance weight in drum type washing machine and manufacturing method thereof |
US7155942B2 (en) | 2001-06-21 | 2007-01-02 | Lg Electronics Inc. | Balance weight in drum type washing machine and manufacturing method thereof |
EP1561852A1 (en) * | 2004-02-05 | 2005-08-10 | Electrolux Home Products Corporation N.V. | Counterweight for washing machine tub and method for the manufacture thereof |
EP1780326A1 (en) * | 2005-10-26 | 2007-05-02 | Gianfranco Piazzoli | A reinforcement for a counterweight for electrical household appliances, a counterweight incorporating said reinforcement and corresponding method of production. |
DE102006011734A1 (en) * | 2006-03-14 | 2007-09-20 | BSH Bosch und Siemens Hausgeräte GmbH | Household appliance with a tub |
DE102006011734B4 (en) * | 2006-03-14 | 2020-06-18 | BSH Hausgeräte GmbH | Household appliance with a tub |
ITAN20080034A1 (en) * | 2008-07-11 | 2010-01-12 | O M G Di Geminiani Gino | BATHTUB AND COUNTERWEIGHT SYSTEM FOR WASHING MACHINES |
US9211048B2 (en) | 2011-01-20 | 2015-12-15 | Whirlpool Corporation | Dampened pump assembly for a dishwasher |
Also Published As
Publication number | Publication date |
---|---|
IT1305246B1 (en) | 2001-04-19 |
AU6080299A (en) | 2000-05-01 |
ITVE980041A1 (en) | 2000-04-13 |
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