Buckles – buttons – clasps – etc.
Patent
1991-06-21
1992-06-02
Silverman, Stanley S.
Buckles, buttons, clasps, etc.
210159, 210396, 210488, B01D 33044, B01D 3346
Patent
active
051184141
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a rotary screening device for separating unwanted solid matter from sea or fresh water. It is particularly directed towards the removal of such matter floating at indeterminate depths, such as sewage, weeds, fish, jelly fish and tar balls.
BACKGROUND OF THE INVENTION
Solid matter such as weeds and jelly fish floating or submerged in water can be a considerable nuisance when the water is to be used for a special purpose for example sea water in a desalination plant, or fresh water for cooling in manufacturing plant process.
The water intake ducts used for such purposes are usually provided with filters for screening unwanted solid matter before the water reaches its destination.
However, the use of filters does not entirely solve the problem because certain solid matter is able on occasions to get past the filters and in the case of tar balls for example the filters themselves merely become blocked.
Further algae and such other weed growth tend to block intake filters in certain parts of the world.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a screening device which is able to remove unwanted solid matter from water subsequently to be used for a special purpose, including floating solid matter and matter such as tar balls which move at indeterminate depths beneath a water surface.
According to the invention there is provided a rotary screening device for separating unwanted solid matter such as weeds, fish and tar balls from a body of water comprising a rotable support body, a plurality of rows of peripheral teeth on the support body for collecting unwanted solid matter from the water as the support body is rotated in the water, a scraper element engaging an annular surface provided between each of the peripheral rows of teeth to remove said unwanted matter collected thereon for discharge to the collection zone, access passageway means for water cleaned of said unwanted solid matter, to the interior of said support body, and discharge means for conveying away the cleaned water passing through said interior of said support body.
Preferably the peripheral teeth are formed on individual annular elements the central apertures of which permit them to be mounted on the support body in a stacked array The periphery of each annular aperture may then be provided with a series of spaced notches for engagement with a series of axially extending rods of the support body defining a hollow interior thereof.
The support rods are preferably held between two transversely extending end plates to complete the support body for the annular elements of the device, one of the end plates having apertures forming an outlet for cleaned water from the hollow interior of the support body.
The sides of each of the annular elements are provided with annular flanges having protuberances which serve to separate the annular flanges in the stacked array thereby providing annular slits leading to the hollow interior of the support body, the annular flanges providing the annular surface for the scraper elements which occupy the space provided between the adjacent annular elements in the stacked array.
Other features and advantages of the present invention will become apparent from the more detailed disclosure which follows.
BRIEF DESCRIPTION OF THE DRAWINGS
Embodiments of the present invention will now be described by way of example with reference to the accompanying drawings wherein:
FIG. 1 is a side view showing a single toothed disc and co-operating scraper element of a rotatory screening device according to an embodiment of the invention;
FIG. 2 is a front view of a stacked assembly of the toothed annular elements shown in FIG. 1;
FIG. 3 is a perspective view of a carrier assembly for the annular elements shown in FIG. 1;
FIG. 4 is an enlarged view illustrating an engagement of the scraper elements of the device as shown in FIGS. 1 and 2 engaging the annular clean water slits formed between adjacent annular elements in the stacked assembly.
REFERENCES:
patent: 606453 (1898-06-01), Fryer
patent: 1430198 (1922-09-01), Stebler
patent: 2137556 (1938-11-01), Young
patent: 3387712 (1968-06-01), Schrink
patent: 4153557 (1979-05-01), Hori
patent: 4261822 (1981-04-01), Richardson
patent: 4303508 (1981-12-01), Skretting
patent: 4517089 (1985-05-01), Arnaud
patent: 4521305 (1985-06-01), Deal
Price, Jr,. Stanley J.
Silverman Stanley S.
Upton Christopher
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