Baths – closets – sinks – and spittoons – Flush closet – Normally empty tank
Patent
1985-05-03
1986-07-22
Marcus, Stephen
Baths, closets, sinks, and spittoons
Flush closet
Normally empty tank
4325, 4395, 137391, 137426, 137410, 137432, 137430, 137397, E03D 118
Patent
active
046010718
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a flush system which is designed to deliver a given volume of water, delivered from a supply or delivery valve means to the inlet of an accumulating chamber.
The flush arrangement is primarily intended for flushing WC-basins, urinals and like sanitary devices, but can also be used in other contexts. WC-basins are today mainly flushed by means of flushing cisterns or flushing valves. One advantage with flushing cisterns, i.e. water containers, which are refilled relatively slowly after each flush and which deliver the water contained therein quite rapidly when the toilet is flushed, is that the flow rate of the water to the cistern, the ingoing water flow, can be kept relatively low, e.g. 0.1 liters/second, and therefore does not influence the dimensioning of the water-supply system of a building. Flushing cisterns, however, require a relatively large amount of space, and often represent more than half the cost of a low-flush WC-basin. A further, and serious, disadvantage with known flusing cisterns is that the inlet valve is constantly under the water-pipe pressure and is of the kind comprising a valve seating and a co-acting valve body. Consequently, it is unavoidable that with time the valve will begin to leak, resulting in an annoying dripping sound. Between flushes, the valve body of the bottom valve is under pressure from the accumulated water, and gradually this valve will also begin to leak, resulting in high water costs and a disturbing noise.
In order to avoid these and other drawbacks associated with such flushing cisterns, attempts have been made to use flush valves instead, which take up little room and are cheaper than flushing cisterns. Since the flush is delivered directly to the basin from the water-supply pipe, via flush valves, the pipe must be dimensioned to accommodate the flow rate required to rinse the basin clean, for example a flow rate of 1.5 liters/second. In order to achieve this rate of flow, it is necessary to install relatively wide pipes and to ensure that the water pressure is not excessively low. Compared with the pipes used in connection with flushing cisterns, the costs incurred when installing wide pipes required for flush valves are very high. Often the use of flush valves is totally excluded, because the pressure of the water is too low, which means that the more expensive flushing cistern must be used, with all its drawbacks. Irrespective of whether one uses a flushing cistern or a flush valve, it is impossible to achieve the most suitable basin flushing sequence, i.e. a sequence in which a large flow of water is delivered initially to the basin, to flush away excreta and paper, followed by a smaller flow of water for replenishing the water seal of the toilet basin, when necessary, said water seal being emptied at times by the sudden down flush of solid substances.
Consequently, a main object of the invention is to provide a flushing system which does influence the dimensioning of the ingoing-water supply system; which is totally leakage-free between flushes; the flushing effect of which is not contingent upon the pressure in the water supply pipes; and which can be placed in an after-flush or secondary-flush mode if so desired.
This object is achieved with a flushing system of the kind mentioned in the introduction, which is mainly characterized in that a float-controlled discharge valve is arranged to be opened when said given volume of water has been delivered to the accumulating chamber and the float is located at a corresponding level in said chamber; in that a supply pipe communicating with said inlet extends downwardly in the accumulating chamber towards said outlet; in that a valve housing co-acting with said float is slidably arranged, together with said float, on said water supply pipe; in that in the closing position of the valve housing, the lower edge part of said valve housing is arranged, in the absence of said given volume of water in the accumulating chamber; to abut or to lie closely adjacent to a seating encircling t
REFERENCES:
patent: 918216 (1909-04-01), Stickdorn
patent: 1629421 (1927-05-01), Stickdorn
patent: 2882533 (1959-04-01), Gray
Marcus Stephen
Sholl Linda J.
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