Baths – closets – sinks – and spittoons – Flush closet – Tank only
Patent
1994-12-19
1997-01-28
Fetsuga, Robert M.
Baths, closets, sinks, and spittoons
Flush closet
Tank only
4354, 4362, E03D 310
Patent
active
055967728
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a toilet flushing system to reduce the use of fresh water in toilets, with a fresh water feed which can be closed off by a valve arrangement. The fresh water feed is connected to a fluid storage container filled with fresh water. The fresh water can be delivered to the toilet through a supply line which can be closed off by the valve arrangement. The system has a storage container casing, in which two partial chambers are formed by a separating diaphragm for receiving and holding gas and fresh water separately from one another.
BACKGROUND OF THE INVENTION
In a toilet flushing system disclosed in German A-26 34 248, a fluid or pressure container with only one diaphragm is attached on the fluid side to a cold- and warm-water fresh water feed for filling with fresh water. The fresh water feed delivers fresh water to a sanitary device with the suitable control setting of the valve arrangement for a flushing or cleansing process. The gas side of the fluid storage container is separated from the fluid side by the elastic or flexible separating diaphragm made of plastic or rubber. The gas cushion of nitrogen or air with a pre-formed bias is present. In a flushing process, the gas cushion delivers the pre-bias pressure to the fluid side, so that the flushing process is induced with high pressure and affords at least identical good cleansing results, as compared with conventional toilet flushing systems, while requiring only a relatively small fresh water volume.
Despite the advantage of the reduction of fresh water required with this known toilet flushing device, pressure surges or peaks occur because of water pressure deviations in the system, which lie below static pressure. The pressure surges or peaks lead to pressure deviations at the end of the flushing process, so that the desired and basic cleansing can no longer be guaranteed, especially with still further reduced flushing water volume. Short filling times, without transmission of pressure points in the water system, when using the known toilet flushing system cannot be attained. Therefore, a structurally larger fluid storage container is required for production of the pre-biasing over the separating diaphragm by means of the gas cushion. This requirement opposes space-saving assembly and construction in toilet flushing systems.
In the toilet flushing system disclosed in German A-35 36 967, a liquid storage container is configured as a cylinder and has a movable piston within it subdividing the cylindrical container into two liquid chambers which can be filled with fresh water. The piston moves back and forth under normal ambient pressure for a flushing cycle. Two flushing processes take place with the same water volume. With the thrusting of one partial water volume out of the cylinder by the piston, the other partial chamber of the cylinder is simultaneously filled with water. When the flushing cycle includes two timed sequential flushing processes, a partial volume of the flushing water is fed to the flushing device during each operation, and improved flushing results are attained. At the same time, with reduced structural size of the flushing assembly in the form of the cylinder with piston, however, a great additional volume of fresh water is required because of the two-cycle flushing cycle.
In the toilet flushing system disclosed in European Patent -A-O 430 521, an elastically flexible diaphragm is blown up in the manner of a balloon to produce the flushing pressure required for a flushing process. Fresh water is fed from the diaphragm bubble into the balloon. For the purpose of a flushing process, the balloon stands under the pressure arising upon contraction of the elastic diaphragm bubble. The bubble again discharges the volumes of fresh water contained therein. In another embodiment of this known toilet flushing system, pre-biasing is attained by a pressure spring which is released abruptly during initiation of a flushing process. Under the spring bias, a piston moves in a cylinder, and
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patent: 2540676 (1951-02-01), Johnson et al.
patent: 2638932 (1953-05-01), Alexander
patent: 2793793 (1957-05-01), Sampson
patent: 3029443 (1962-04-01), Naccarato
patent: 4707868 (1987-11-01), Hennessy
Fetsuga Robert M.
Hydac Technology GmbH
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