Liquid purification or separation – With means to add treating material – With distinct reactor tank – trough or compartment
Patent
1990-10-18
1994-05-03
Dawson, Robert A.
Liquid purification or separation
With means to add treating material
With distinct reactor tank, trough or compartment
210232, 210286, 210288, 2104162, 210477, B01D 2702
Patent
active
053084829
DESCRIPTION:
BRIEF SUMMARY
This invention relates to portable water-purifying devices.
Portable water-purifying devices are known which utilise a strong base anion exchange resin converted into an iodinated form for purifying water. It is also well known to use carbon in the silvered or unsilvered forms in water-purifying units. However, known portable water-purifying devices are not very effective for killing large numbers of bacteria and are particularly ineffective in killing viruses.
It is an object of the invention to provide a portable water-purifying device with a capability of killing large numbers of both bacteria and viruses.
The invention provides a portable water-purifying device as claimed in each of the claims, to which reference is directed.
The invention will be described by way of example with reference to the accompanying drawings, wherein:
FIG. 1 is a perspective view of a portable water-purifying device embodying the invention, showing the device packed away when not in use;
FIG. 2 is an enlarged section through the centre line of FIG. 1, but omitting all the water treatment chemicals;
FIG. 3 is a sectional view showing the device in use;
FIG. 4 is a partly sectioned view showing a final stage of purification with water flowing from the combined secondary disinfecting chamber/post filter into the drinking cup;
FIG. 5 is a section through a primary disinfecting chamber 50;
FIG. 6 is a section on A--A in FIG. 5; and
FIG. 7 is a view showing parts of the device fitted to a water bottle by means of a special adaptor whereby water is purified by the device and held in the water bottle.
Referring to FIGS. 1 to 6, the illustrated portable water-purifying device comprises a first receptacle 10 in the form of a drinking cup, for holding purified water, a primary disinfecting chamber 50, a second receptacle forming a combined secondary disinfecting chamber and post-filter 30, a third receptacle 90, for raw water, including a pre-filter media 39, and a cover 12.
As will be described in detail below, in use the drinking cup 10 is filled with water from the combined secondary disinfecting chamber and post-filter 30, which is detached from the rest of the device and placed on the drinking cup 10 in an inverted position located by the internal webs provided.
In operation and when not in use the combined secondary disinfecting chamber and post-filter 30 is secured to the primary disinfecting chamber 50 by means of a quick action bayonet fixing. This is achieved by internal projections (not shown) of the primary disinfecting chamber 50 locating with external projections (not shown) provided on the combined secondary disinfecting chamber and post-filter 30. The primary disinfecting chamber 50 is therefore always secured to the combined secondary disinfecting chamber and post-filter 30 (as shown in FIGS. 1, 2 and 3) except during the final stage of treatment as shown in FIG. 4.
The third receptacle 90, for raw water, contains a pre-filter and is adapted to fit inverted over the primary disinfecting chamber 50, when not in use, and to fit upright onto the primary disinfecting chamber 50 when in use to receive water to be purified and to provide pre-filtration before the water is passed into the primary disinfecting chamber 50. More particularly, the primary disinfecting chamber 50 is provided with a cap 52 having a central depression 66 into which a circular flange 92 of the third receptacle 90 fits, held tightly by means of interlocking tapers when in use, as shown in FIG. 3. The base of the depression in the cap of the primary disinfecting chamber 50 and the base of the third receptacle 90 are provided with a central holes 74 and 94 to allow water to flow from the third receptacle 90 into the chamber 50.
The cover 12 is adapted to fit inverted over the third receptacle 90 when not in use, as shown in FIGS. 1 and 2 and can be used for collecting water and pouring this into the third receptacle 90 as shown in FIG. 3. A rim 26 of the cover 12 is of substantially the same diameter as the lower rim 78 of the primary disinfecting chambe
REFERENCES:
patent: 4227901 (1980-10-01), Lange
patent: 4770768 (1988-09-01), Lang
patent: 4826594 (1989-05-01), Sedman
Dawson Robert A.
Pre-Mac Kent Ltd.
Walker W. L.
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