US 11,754,137 B2 · Compression spring assembly and methods of using the same

Abstract

An all plastic compression spring assembly includes a slotted tubular spring element formed from a tensile polymer material and upper and lower loading cones received at opposing upper and lower ends of the slotted tubular spring element. The upper loading cone may be axially compressible towards the lower loading cone within the slotted tubular spring element whereby the slotted tubular spring element radially expands in tension to create an opposing radial contraction force, and in turn, an axial extension spring force. When released, the spring element elastically returns to its normal at rest shape, returning the cones to their normal at rest positions. In some dispenser configurations, the lower loading cone may be stationary or fixed within the dispensing head and the upper loading cone may be downwardly compressible toward the lower loading cone by movement of a nozzle head.

Claims18

Dependent claims

A tubular spring element for a compression spring assembly, comprising:

a cylindrical shape, wherein the tubular spring element is molded from a tensile, recyclable polymer material selected from the group consisting of polypropylene, high-density polyethylene, and low-density polyethylene;
a wall thickness, wherein the wall thickness comprises a uniform wall thickness;
a first end;
a second end;
a single longitudinal slot extending from the first end to the second end;
and
wherein the slot allows the tubular spring element to expand radially upon application of an axial force to an inner wall edge of at least one end of the tubular spring element.

4 more elements

Dependencies are inferred from the claim text.

Compression spring assembly and methods of using the same

Life of this patent

Compression spring assembly and methods of using the same

Life of this patent

Abstract

Claims18