According to the invention, there is provided a pair of separable elements which jointly define a rather small pumping cavity, one of the elements being compressible to reduce the size of the pumping cavity, thereby forcing fluid out through an outlet opening in one of the elements. Such elements are moveable toward and away from each other and are disposed in a supply of the fluid to be pumped.BALANCING VALVES In a preferred embodiment, one of the elements comprises a flat surface having an outlet opening, and the other element comprises a reciprocable sleeve of resilient material moveable endwise into encircling engagement with the flat surface around the outlet opening, there being a mandrel within the tubular sleeve which does not extend to the end of the sleeve, thereby defining a small pumping cavity, typically having a size of a large drop of fluid. Other aspects include a stirring mechanism which is automatically driven at a rate which is a function of the rate of pump strokes, and which thus is a function of the pumping rate.

Accordingly, it is an object of the present invention to provide a reliable pump capable of handling latex fluids or other high viscosity liquids while still having a capability to handle low viscosity fluids.

Another object of the present invention is to provide a pump wherein the size of the quantity pumped per stroke or cycle is independent of the speed of the plunger that supports one of the elements, which is independent of the amount of free travel that the plunger has, which is independent of viscosity,Bellow Seal Valve and which is independent of air or debris in the supply of fluid, such as agglomerates of rubber particles.

A further object of the present invention is to provide a pump that can have its supply filled by gravity without any externally pressurized fluid system being required, whereby there is no need for any pressure seals around any moveable components.

Yet another object of the present invention is to provide a high pumping pressure only during the final portion of the movement of a rod or plunger,Forged Steel Valves and which exists only in the outlet flow section of the device.

A still a further object of the present invention is to utilize a self-relieving construction for avoiding any excessive pressures.

Many other advantages, features and additional objects of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.

MORE NEWS

2011-12-22

Back