Bellows pump system and method for the use thereof
The present invention provides an assembly of bellows part and a part against which unrolling takes place (the unrolling part), comprising a bellows part with a flexible wall of a predetermined shape and thickness variation which co-operates with an unrolling part with a stiff outer wall along which the flexible wall is movable, wherein the unrolling part has a predetermined diameter variation and/or the flexible wall has a predetermined thickness variation so as to cause a desired development of force.
1. An assembly, comprising:
a bellows part, comprising:
a flexible wall;
a thickened base at one end of the flexible wall;
a turned-back edge at an opposite end of the flexible wall;
a cylindrical pressure valve adjacent the thickened base at one end of the flexible wall; and
a suction valve adjacent to and encircled by the turned-back edge;
a co-acting part, comprising:
a top portion; and
a conical outer wall, comprising:
a concave first conical part; and
a second conical part;
wherein the turned-back edge of the bellows part rests on the top portion of the co-acting part and the bellows part co-operates with the co-acting part.
2. The assembly of claim 1 , wherein a thickness of the flexible wall adjacent the thickened base is greater than the thickness of flexible wall adjacent the turned-back edge so as to cause a desired development of force.
3. The assembly of claim 1 , wherein the turned-back edge is arranged on an outer end thereof for the purpose of absorbing a pressure force.
4. The assembly of claim 1 , wherein the flexible wall further comprises a thickened portion.
5. The assembly of claim 1 , wherein the flexible wall further comprises a bend.
6. The assembly of claim 1 , wherein the flexible wall further comprises a concave cross-section.
7. The assembly of claim 1 , wherein the flexible wall further comprises a convex cross-section.
8. The assembly of claim 1 , wherein the bellows part comprises a material selected from the group consisting of a thermoplastic polymer and an elastomer.
9. The assembly of claim 1 , wherein the flexible wall of the bellows part is substantially cylindrical.
10. The assembly of claim 1 , wherein the suction valve further comprises three legs connected to the turned-back edge.
11. The assembly of claim 10 , wherein the legs are Z-shaped in top view for an improved spring action.
12. The assembly of claim 1 , wherein the suction valve further comprises a guide protrusion.
13. The assembly of claim 1 , wherein the cylindrical pressure valve comprises a cylindrical flexible wall.
14. A pump, comprising an assembly as recited in claim 1 .
15. A method for using an assembly as recited in claim 1 , comprising rolling and unrolling the bellows part over at least a portion of the co-acting part.
16. The assembly of claim 1 , wherein the turned-back edge further comprises a thickened edge and wherein the thickened edge rests on the top portion of the co-acting part.
17. An assembly, comprising:
a bellows part, comprising:
a flexible wall;
a thickened base at one end of the flexible wall;
a turned-back edge at an opposite end of the flexible wall;
a cylindrical pressure valve adjacent the thickened base at one end of the flexible wall; and
a suction valve adjacent to and encircled by the turned-back edge;
a co-acting part, comprising:
a top portion; and
a conical outer wall, comprising:
a convex first conical part; and
a second conical part;
wherein the turned-back edge of the bellows part rests on the top portion of the co-acting part and the bellows part co-operates with the co-acting part.
18. The assembly of claim 17 , wherein a thickness of the flexible wall adjacent the thickened base is greater than the thickness of flexible wall adjacent the turned-back edge so as to cause a desired development of force.
19. The assembly of claim 17 , wherein the flexible wall further comprises a thickened portion.
20. The assembly of claim 17 , wherein the turned-back edge further comprises a thickened edge and wherein the thickened edge rests on the top portion of the co-acting part.