Fluid handling – Systems – Tank with movable or adjustable outlet or overflow pipe
Reexamination Certificate
1999-06-18
2001-08-28
Rivell, John (Department: 3753)
Fluid handling
Systems
Tank with movable or adjustable outlet or overflow pipe
C137S589000, C137S590000
Reexamination Certificate
active
06279609
ABSTRACT:
The present invention is directed towards a float-supported flow control liquid outlet means from and to a body of liquid, and more precisely a liquid outlet fashioned to ensure steady and uninterrupted flow from a body of liquid to subsequent downstream storage or treatment steps.
The invention will be described below with particular reference to outflow from bodies of liquid, and is in fact used specifically for ensuring a steady, uninterrupted outflow from large water-containing containers, vessels or tanks where it is desirable to have a steady outflow uninterrupted by impact loads in the reservoir.
Of known technology in the field, broad reference will be made to the following publications:
1) DE 3 914 702-A1 which describes a device for controlling the outflow from a container containing liquid.
A float is coupled via a suitable mechanism to a mechanical element which in turn, with the aid of a suitable sliding valve, controls the opening of the gates where the fluid flows out;
2) DE 4 436 230-A1 which describes a device for controlling constant liquid flow from a liquid container, and where the opening in the outlet gate is adjusted by means of the liquid level via a spring-loaded plate in the bottom of the container.
When the liquid level in the vessel rises, pressure is exerted on the plate which in turn reduces an outlet opening; and
3) GB 1 131 746 which also describes a device for control of a liquid flow from a a container or reservoir.
In this case, an outlet opening is placed at a certain level in the reservoir so that liquid can flow down and out from the reservoir. An inverted bell or cup is positioned over and around the outlet opening and by adjusting the air pressure in this bell or cup, the liquid level in the area around the outlet opening is in turn adjusted. This permits control of the liquid outflow from the reservoir.
None of these documents describe an outlet device which ensures steady and uninterrupted flow from the body of liquid, in which the outlet means is placed, to the subsequent storage or treatments steps.
A steady and uninterrupted flow is of particular importance where the outflow amount and intake amount are to be set at a certain level, for example, in connection with chemical processes, or where different substances are to be mixed into the liquid for various future purposes.
One of the objects of the present invention is to improve the prior art and accordingly it relates to a flow control means for stable and constant discharge flow from and to a body of liquid. The invention is characterised in that the outlet comprises a float body which floats on a body of liquid, with a main outlet pipe having a mouth/upper end above the upper surface of the body of liquid, and into which there is passed, from the is body of liquid, one or more feed outlet pipes/gates which open into the main outlet pipe at a desired distance below the upper surface of the body of liquid.
REFERENCES:
patent: 1108090 (1914-08-01), Barieau
patent: 1183122 (1916-05-01), Rollins
patent: 1955308 (1934-04-01), Naftel et al.
patent: 2396962 (1946-03-01), Moore
patent: 2882928 (1959-04-01), Cogliati
patent: 3113698 (1963-12-01), Abplanalp
patent: 4052180 (1977-10-01), Erickson
patent: 4094338 (1978-06-01), Bauer
patent: 5133854 (1992-07-01), Horvath
patent: 5290434 (1994-03-01), Richard
patent: 395 562 (1965-12-01), None
patent: 25 40 088 (1977-03-01), None
patent: 410199 (1910-05-01), None
patent: 440652 (1975-02-01), None
Merchant & Gould P.C.
Per Velve
Rivell John
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