Baths – closets – sinks – and spittoons – Flush closet – Tank only
Reexamination Certificate
1999-02-11
2001-06-12
Phillips, Charles E. (Department: 3751)
Baths, closets, sinks, and spittoons
Flush closet
Tank only
Reexamination Certificate
active
06243886
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a device for displacement of water in water storage vessels such as toilets.
BACKGROUND OF THE INVENTION
Considerable emphasis is currently placed on savings of water in residential and particularly commercial premises and educational premises. A modem toilet tank contains in excess of six litres of water and many older toilet tanks presently in use generally contain either nine or thirteen litres of water.
The majority of toilet appliances require only six to seven and one-half litres of water per flush and therefore, many appliances waste at least thirty percent of their water content every time the toilet tank is emptied. Not only does this represent a considerable waste of water, which burdens water supplies and waste water treatment plants, but it is also financially wasteful where water usage is measured by a meter, and consumers pay for water according to the volume of usage.
SUMMARY OF THE INVENTION
Reducing the volume of water dispensed from a toilet tank when flushed, allows an appreciable saving in cost and resources. Thus, in one embodiment, a water displacement device for water storage vessels such as toilets, includes a flexible container within which is provided a material which is water-absorbent such as to expand to many times its pre-absorption volume.
In one embodiment, the container is a bag of a plastics material such as polyethylene, and includes a small and compact quantity of a highly absorbent material which is capable of expanding to two hundred or more times its pre-absorption volume when submerged in a water storage tank. The bag may also include a weight so that it sinks to the bottom of the vessel whereby the bag, after expansion of the absorbent material, resides beneath the flotation member attached to the water inlet valve.
REFERENCES:
patent: 3877081 (1975-04-01), Klein
patent: 5259075 (1993-11-01), Cutler
patent: 5419955 (1995-05-01), Ehrhardt et al.
Kma (U. K.) Limited
Phillips Charles E.
Wolf Greenfield & Sacks P.C.
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