Abrading – Machine – Sandblast
Patent
1993-11-08
1995-11-21
Rachuba, Maurina T.
Abrading
Machine
Sandblast
451 88, 451 89, B24C 300
Patent
active
054681758
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a heavy-duty dishwasher for washing with granules heavier than liquid, comprising a washing chamber, a spray device for spraying washing liquid, with or without granules, against articles to be washed in the washing chamber, a tank which is Joined to an outlet from the washing chamber, and a circulation pump, the suction side of which is joined to an outlet from the tank and the pressure side of which is Joined to means for conducting liquid sucked into the tank, with or without granules, to the spray device.
A number of heavy-duty dishwashers are previously known in which blast particles or granules together with the washing liquid are thrown or sprayed against the articles to be washed.
BACKGROUND OF THE INVENTION
EP-A1-0 016 895 reveals a heavy-duty dishwasher of this type, which contains in its tank a granule collecting sieve container with its inlet connected to the washing chamber and its outlet connected to the suction chamber of the pump. A gate closes in one end position the outlet of the sieve container and thereby opens a connection between the suction chamber and portions of the tank lying outside the sieve container, so that only liquid is sucked up by the pump: In the other end position of the gate, said connection is closed and the pump sucks liquid from the tank via the sieve container, whereby the liquid sucked in has granules from the sieve container. In addition to the fact that such a dishwasher has relatively complicated construction, it requires time consuming maintenance in order to prevent the sieve container from being clogged by food particles carried by the circulating liquid.
EP-A2-0 195 959 and EP-A1-0 169 847 show dishwashers of the above-mentioned type for granules heavier than the washing liquid. In such machines, a vertically moveable cylinder is disposed at the bottom outlet of the tank. In the upper position of the cylinder, liquid and granules flow from the tank through the annular gap between the lower end of the cylinder and the bottom outlet of the tank. This gap is closed when the cylinder is in its lower position, where liquid from the tank is sucked in through a gap between the upper end of the cylinder and a conical plate which prevents granules from flowing from above into the upper open end of the cylinder. The dishwasher according to EP-A2-0 195 959 also contains an annular sieve plate in the last mentioned gap in order to prevent granules from accompanying liquid sucked into the upper end of the cylinder. In EP-A1-0 169 847, it is assumed that the granules will sink by their own weight to the bottom of the tank, and that only liquid will be sucked into the upper end of the cylinder when the cylinder assumes its lower end position. However, granules which pass by the upper end of the cylinder when it serves as a pump inlet will be sucked into the inlet, and therefore it takes a relatively long time for such a machine to assume a state where only liquid is circulated and all the granules have sunk to the bottom of the tank.
SUMMARY OF THE INVENTION
The present invention is intended to achieve a heavy-duty dishwasher using granules, said dishwasher not containing any sieve element to prevent granules from accompanying liquid sucked into the pump; and which can be immediately switched from a state where liquid with granules is sucked up by the pump to a state where only liquid is sucked into the pump, and which also has a simple and sturdy design with few components.
For this purpose, a heavy-duty dishwasher of the type described by way of introduction is characterized in that it comprises a dividing wall, defining an upwardly open chamber in the tank, the upper edge of said wall being disposed beneath the upper limit of the tank and that the outlet opening of the washing chamber is disposed above the chamber defined by the dividing wall. In this dishwasher, the upper edge of the dividing walls serves as a spillway and it allows liquid supplied to the chamber defined in the tank to overflow to the port
REFERENCES:
patent: 1600001 (1926-09-01), Hoevel
patent: 1601147 (1926-09-01), Ruemelin
patent: 4610113 (1986-09-01), Fageroos
patent: 5049260 (1991-09-01), Spears
Rachuba Maurina T.
Viptop AB
LandOfFree
Dishwasher wherein liquid is circulated with granules and separa does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dishwasher wherein liquid is circulated with granules and separa, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dishwasher wherein liquid is circulated with granules and separa will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1133332