Dispensing pump with skirt spring

Patent metadata

Field	Value
Publication number	US-10773269-B2
Application number	US-201815936569-A
Country	US
Kind code	B2
Filing date	Mar 27, 2018
Priority date	Jan 13, 2014
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

A dispensing pump for liquids, viscous materials, foams, gels, etc. includes a resilient plastic skirt spring so that the entire pump can be more easily recycled. The skirt spring comprises a plurality of concentric nesting rings sequentially decreasing in diameter from a base ring to a top ring to form a conical shape wherein adjacent rings are interconnected by spaced bridge segments and the bridge segments are staggered at each sequential ring.

First claim

What is claimed is:

1. A polymer skirt spring for a dispensing pump comprising
a plurality of concentric nesting rings sequentially decreasing in diameter from a base ring to a top ring to form a conical shape
wherein adjacent rings are interconnected by spaced bridge segments, said bridge segments being staggered at each sequential ring, said skirt spring further including an upper wall extending inwardly from the top ring and an inner piston wall extending downwardly from the upper wall, and
wherein the upper wall further includes an upwardly extending annular projection configured and arranged to create a space for fluid to flow over when installed in the dispensing pump.

2. The skirt spring of claim 1 wherein the bridge segments comprise opposing bridge segments spaced 180 degrees apart.

3. The skirt spring of claim 2 wherein the opposing bridge segments are staggered 90 degrees at each sequential ring.

4. The skirt spring of claim 1 wherein said plurality of concentric nesting rings includes at least one intermediate ring between said base ring and said top ring.

5. The skirt spring of claim 4 wherein said intermediate ring is adjacent said top ring, and wherein said inner piston wall extends below said intermediate ring.

6. The skirt spring of claim 2 wherein said plurality of concentric nesting rings includes at least one intermediate ring between said base ring and said top ring.

7. The skirt spring of claim 6 wherein said intermediate ring is adjacent said top ring, and wherein said inner piston wall extends below said intermediate ring.

8. The skirt spring of claim 3 wherein said plurality of concentric nesting rings includes at least one intermediate ring between said base ring and said top ring.

9. The skirt spring of claim 8 wherein said intermediate ring is adjacent said top ring, and wherein said inner piston wall extends below said intermediate ring.

10. A polymer skirt spring for a dispensing pump comprising a plurality of concentric nesting rings sequentially decreasing in diameter from a base ring to a top ring to form a conical shape,
wherein adjacent rings are interconnected by spaced bridge segments,
wherein said bridge segments are staggered at each sequential ring,
wherein said bridge segments comprise opposing bridge segments spaced 180 degrees apart,
wherein said skirt spring further includes an upper wall extending inwardly from the top ring and an inner piston wall extending downwardly from the upper wall, and
wherein the upper wall further includes an upwardly extending annular projection configured and arranged to create a space for fluid to flow over when installed in the dispensing pump.

11. The skirt spring of claim 10 wherein said opposing bridge segments are staggered 90 degrees at each sequential ring.

12. The skirt spring of claim 10 wherein said plurality of concentric nesting rings includes at least one intermediate ring between said base ring and said top ring.

13. The skirt spring of claim 12 wherein said intermediate ring is adjacent said top ring, and wherein said inner piston wall extends below said intermediate ring.

14. The skirt spring of claim 11 wherein said plurality of concentric nesting rings includes at least one intermediate ring between said base ring and said top ring.

15. The skirt spring of claim 14 wherein said intermediate ring is adjacent said top ring, and wherein said inner piston wall extends below said intermediate ring.

16. A polymer skirt spring for a dispensing pump comprising a plurality of concentric nesting rings sequentially decreasing in diameter from a base ring to a top ring to form a conical shape,
wherein adjacent rings are interconnected by spaced bridge segments,
wherein said bridge segments are staggered at each sequential ring,
wherein said bridge segments comprise opposing bridge segments spaced 180 degrees apart,
wherein said opposing bridge segments are staggered 90 degrees at each sequential ring,
wherein said skirt spring further includes an upper wall extending inwardly from the top ring and an inner piston wall extending downwardly from the upper wall, and
wherein the upper wall further includes an upwardly extending annular projection configured and arranged to create a space for fluid to flow over when installed in the dispensing pump.

17. The skirt spring of claim 16 wherein said plurality of concentric nesting rings includes at least one intermediate ring between said base ring and said top ring.

18. The skirt spring of claim 17 wherein said intermediate ring is adjacent said top ring, and wherein said inner piston wall extends below said intermediate ring.

Assignees

• Silgan Dispensing Systems Corp

Inventors

• Dejong David L

Classifications

• B05B11/1023 Primary

  having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem · CPC title

• B05B11/104

  the outlet valve being opened by pressure after a defined accumulation stroke · CPC title

• B05B11/1069

  the valve being made of a resiliently deformable material or being urged in a closed position by a spring · CPC title

• B05B11/1001

  Piston pumps (B05B11/1087, B05B11/1088, B05B11/109 take precedence) · CPC title

• B05B11/1047

  the pump being preassembled as an independent unit before being mounted on the container · CPC title