Translation of "Grobsieb" in English

The coarse screen 51 here is configured as an upright cylinder.

The integrated coarse sieve in sediment bell prevents blockages in the tubing.

The connecting surface between the two hollow bodies (24, 25) is formed as a coarse screen (26).

After the incubation period selected, the bath is filled through a coarse filter into a separating funnel.

According to the invention, this is achieved by a connection of the inlet which is located at the top of the container with a first outlet located in the lower region, through a connecting means having a check valve and an overflow opening closed by a coarse screen, by further connection of a second outlet discharging at the floor of the container through a riser and a bend with the sewerage conduit into which the connecting means is also directed, and by providing a fine screen in the container between the connecting means and heat exchangers, surrounding the connecting means at least in the region of the overflow opening.

The connecting means 20 consists of two inverted frustoconical hollow bodies 24, 25, with a coarse screen 26 connecting the base line 25a of the lower hollow body 25 with a location adjacent to the boundary line 24b on the covering surface of the upper hollow body 24.

Through the coarse screen (26) the waste water reaches the container, and the heat can reach the heat exchangers (31) through the fine screen (30), so that practically uncontaminated water is present at the heat exchangers, and the need for cleansing is substantially diminished.

BACKGROUND OF THE INVENTION The invention refers to an apparatus for obtaining nutritive substances by extracting bones and meat which optionally adheres thereon, comprising a receptacle for accommodating the bones and the liquid used for extracting, preferably water, in which receptacle at least one rotating stirring member is provided, the receptacle being tiltable about a horizontal axis so that its content gets to a coarse sieve for separating the bones and the coarse elements from the liquid and the fine elements.

Suitably the trough carrying the coarse sieve can be tilted about a horizontal axis into a discharge position, preferably by hydraulic means including a hydraulic cylinder.

The fat then runs through the coarse sieve 15 onto the rotating sieve 23 for delivery into the trough 25 with the aid of stripper 24 made of a sheet metal.

In the cocoa precleaning unit, the cocoa beans go through several sieving stages: a coarse sieve, a fine sieve, a strong flow of air (aspiration), a metal separator (magnet) and a vibratory sieve remove leaves, fibres, sand, stones and metal from the cocoa beans.

The dishwasher according to claim 2, wherein the comminutor is arranged in the path of flow between the coarse filter and the centrifuge.

Furthermore, each of the storage tanks 13 has a coarse strainer 15 (not shown) and also a fine filter 16 .

In order to prevent the line system in which washing liquor is circulated in water conducting household appliances, such as dishwashers for example, becoming contaminated with dirt particles, a filter system is used, which may comprise a coarse filter, a fine filter and a micro filter.

The coarse filter here serves to retain dirt particles, which could lead to a blockage of the washing liquor pump.

In the embodiment shown here, a coarse ring-shaped screen 20 having a slightly conical shape is optionally also provided, so that its outer edge 21, which is situated further toward the top, can be attached to the lower edge of the inlet connection 6, while the inner edge 22 at the bottom is placed on the inside wall 14 of the collecting basin 12 .

Thus, it may be sufficient, for example, to provide a coarse screen in the appliance to retain large scraps of food, such as bones, which might block a pump for instance.

The pump sump of a dishwasher can preferably feature a filter combination comprising the above cited flat filter, a coarse filter and a microfilter.

The coarse filter is used in this case to filter out larger dirt particles, while the fine filter and the microfilter are used to filter out dirt particles that are finely dispersed in the washing liquid.

The filter systems generally have more than one stage and consist of a flat fine filter, a coarse filter and optionally a microfilter.

Moreover, the coarse filter 21 extends vertically downwards in the form of the microfilter 22, which is likewise designed in the form of a hollow cylinder and itself extends to the very floor 23 of the pump sump 11 .

Naturally, in particular embodiments, a means for supporting gentle mechanical emptying or removal of the aquatic animals 28 from the fish lifting channels 26 and/or a coarse screen can be provided in order to prevent coarse debris in the emptying zone 29 from falling out of a screen panel 4 into the catch collecting drain 30 .

The housing 2 of all of the individual units is identical, whereby at the filter inlet 3 a coarse screen 5 for a pre-dusting takes care, that is here the coarse parts are removed from the onflowing air.

The wash arms 3, 4, 5 are supplied with circulating wash fluid by way of associated feed lines 11, 12 from a circulating pump 9 . During a washing operation the wash fluid is continually fed through a filter strainer combination 10 consisting of a fine strainer and a coarse strainer as well as a very fine strainer disposed at the bottom of the sudsing chamber 2 .

The water (grey water) that during a cleaning process flows by way of the water cock 2 from the potable water system 1 to the wash basin 3, which water comprises dirt particles, organic substances as well as soap or tensides, is channelled by way of a coarse sieve 4 into the receiver container 6 of the grey-water treatment device 7, 8 .

In another preferred embodiment, the pre-filter screen can also be designed as a two-stage screen with a coarse screen and with a fine screen.