Pumps – Successive stages – Reciprocating rigid stages
Patent
1997-08-28
2000-02-15
Freay, Charles G.
Pumps
Successive stages
Reciprocating rigid stages
239321, F04B 2502
Patent
active
060245409
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to the technical field of hydraulics.
BACKGROUND OF THE INVENTION
Pumps are classified according to the movement of the force body of the pump, such as:
1) piston pumps, wherein the drive piston has a reciprocating straight-line movement;
2) rotary pumps, wherein the drive piston has a reciprocating angular movement; and
3) centrifugal pumps, wherein the body turns inside the pump body.
The following are descriptions of the prior art types of piston pumps: valve, which is housed in the cylindrical valve inlet. On the downward stroke, it closes this valve and, in turn, opens the delivery valve through which it discharges the volume of the contents of the cylinder. openings. The plunger thereby forms two chambers in the cylindrical body, intake taking place in the lower chamber, and compression taking place in the upper chamber when the plunger rises. valve actuated by a rod on its outside. stroke, one side of the plunger lifts while the other compresses. stroke of the plunger, intake and injection into the delivery tube take place at the same time. On the downward stroke, the lower side of the plunger causes an injection through a union tube into the upper cylindrical space. However, the plunger stem also displaces fluids which pass to the delivery tube. Therefore, the pump works through intake and compression on the upward stroke, and on the downward stroke by compression only.
The components of conventional piston pumps are:
SUMMARY OF THE INVENTION
A pump for pumping through a variable volume plunger chamber having a pair of plungers disposed in a stepped cylinder with a slide valve includes two plungers of different diameters united to a single stem and housing in a cylinder. On the plunger-stroke, a difference of volumes occurs. Pumping is achieved through intake and drive by means of valves which direct the flow in only one direction. The pumping is not the result of piston displacement, but the volume loss in the cylinder due to its variable diameter.
The two plungers shifted by a single rod on each stroke in a cylinder of two different diameters create a chamber of variable diameter which causes the displacement of fluids.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a vertical section view of the pump in the position of pressure on the stem.
FIG. 2 is a vertical sectional view of the pump in the intake position.
FIG. 3 is a perspective and sectional view of the plunger chamber.
FIG. 4 is a vertical sectional view of the pump in its metering version, in the intake position.
FIG. 5 is a vertical sectional view of the pump in its metering version, in the drive position.
FIG. 6 shows a diagram of the plastic parts required for the execution of a current metering pump.
FIG. 7 is a vertical sectional view showing a specimen embodiment of this invention as a cosmetic product metering pump.
FIGS. 8 and 9 are vertical sectional views of the embodiment of the invention using diaphragms.
FIGS. 10 and 11 are vertical sectional views of the pumps in positions shown in FIGS. 2 and 1, respectively.
FIG. 12 is a vertical sectional view showing an embodiment of this invention by means of a hollow stem with two diaphragms.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The pump includes an intake pipe 2 and a hollow stem 3, surrounded at its lower end by a plunger chamber 4, so that when the pump body 1 and the intake tube 2 are filled with air (FIGS. 1,11) the hollow stem 3 rises, on its upward travel it draws the plunger chamber 4, the liquid then follows an upper plunger 4A in its ascent, and pump intake takes place. The amount of liquid which enters into the pump body is equal to the product of the plunger action due to its travel. When the hollow stem 3 moves down, that is during drive, it causes the plunger chamber 4 to descend, and the plungers 4A, 4B inject the amount of the differential volume between the cylinders 5A, 5B into the delivery pipe 3A.
On each drive the fluid level into the delivery pipe 3A rises until it reaches the draining opening.
The pump
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Evora Robert Z.
Freay Charles G.
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