Fluid sprinkling – spraying – and diffusing – With means to vibrate or jiggle discharge – By electric transducer
Patent
1998-08-13
2000-09-05
Recla, Henry J.
Fluid sprinkling, spraying, and diffusing
With means to vibrate or jiggle discharge
By electric transducer
222309, 2223831, 2223865, B05B 108, B05B 304
Patent
active
06113001&
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to apparatus and methods for supplying liquids (which term includes liquid suspensions).
In some circumstances it is desirable to supply liquid, including for example suspensions containing particles which tend to separate out, at less than or at most ambient pressure. For the purposes of the present application a pressure either less than the ambient pressure or equal to the ambient pressure will be referred to as negative pressure.
The supply may be to a liquid receiving or dispensing means and may be from and to a liquid container. The containers may be of the type wherein the liquid within the container has a surface that is exposed to the ambient environment or containers wherein the liquid within the container is sealed from the ambient environment. Where the type of container is important to the description and the sense is not clear from the context we shall refer to these as `open containers` or `closed containers` respectively.
It is often necessary in liquid supply applications to transport liquid at controlled pressures and flow rates. In practical situations the means used typically comprises a liquid storage container, a pump, and a liquid supply conduit. The supply conduit may terminate, for example, in an open nozzle from which liquid may be supplied, for example for applying lubricating oil to rotating mechanical components, or it may terminate in say a regulating valve to provide flow rate control, for example for delivery of petroleum from a fuel tank to the carburetor of an internal combustion engine.
Where the liquid supply means incorporates a pump the liquid is typically subjected to positive pressures in order to transport the liquid to its point of delivery. The liquid will therefore typically arrive at its point of delivery at pressures equal to or above ambient pressure (which may often be the atmospheric pressure).
Where the liquid supply means does not include a pump, the liquid can ordinarily only be supplied to a level equal to or below that of the liquid level in the container. In this circumstance the hydrostatic pressure in the container provides the driving force required to transport the liquid to a position of equivalent or lower hydrostatic pressure. At its point of delivery the liquid will again typically be at a pressure equal to or greater than ambient pressure.
An object of the present invention is to provide apparatus to supply liquid from a container to liquid receiving or dispensing means at a pressure either less than or equal to the ambient pressure.
According to the present invention there is provided a liquid supply apparatus comprising volume of air in the receptacle in order that the liquid supplied to the outlet is at negative pressure.
In one embodiment of the present invention the apparatus may comprise a liquid supply conduit having rigid walls, one end of which is open and which in use is immersed in liquid; an expandable chamber that is in pressure-transmitting relation to the interior volume of the conduit and operable to provide interior volume change between the chamber and the open end of the conduit; and a valve between the interior volume of the conduit and/or the expandable chamber and the ambient atmosphere that is operable to open and close which, when open, allows at least air or other gases to be admitted into and exhausted from said interior volume and when closed prevents such admission or exhaustion; such that the expandable chamber is mechanically linked to the valve so that expansion of the interior volume of the chamber maintains the valve in a closed state.
The term `rigid` is used throughout to mean `does not significantly distort under the pressures or forces experienced during operation of the apparatus`. With respect to the conduit it indicates that, during operation, the material of which the conduit walls are made do not expand or contract substantially and correspondingly that the interior volume of the conduit does not change substantially. The term `conduit` is used throughout to denote a passa
REFERENCES:
patent: 855647 (1907-06-01), Mallonee
patent: 2353069 (1944-07-01), Perkins
patent: 2800254 (1957-07-01), Dinkelkamp
patent: 5533879 (1996-07-01), Chen
Humberstone Victor Carey
Janse Van Rensburg Richard Wilhelm
Sant Andrew Jonathan
Schumann Matthew Alexander
Maust Timothy L.
Recla Henry J.
The Technology Partnership PLC
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