Plastomer spring with captive valve
AssigneeEssity Hygiene and Health Aktiebolag
InventorsHakan LINDSTROM, Peter BERGMAN, Hugo NILSSON
Life of this patent
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Abstract
The disclosure relates to a fluid pump including a plastomer spring with a captive valve element provided in an integrally formed valve chamber. The spring includes a first end portion and a second end portion and one or more spring sections connecting the first end portion to the second end portion, which spring sections can be compressed in the axial direction from an initial condition to a compressed condition and can subsequently expand to their initial condition. The valve chamber is formed in the first end portion.
Claims43
A plastomer spring for use in a fluid pump, comprising:
- a first end portion;
- a second end portion;
- and
- one or more spring sections between and connecting the first end portion to the second end portion and being compressible in an axial direction of the spring from an initial condition to a compressed condition,
- wherein the first end portion defines a valve chamber for captively receiving a moveable valve element, the valve chamber including a valve seat against which the valve element may seal to prevent fluid flow through the valve chamber, the valve chamber further comprising a valve support element and a lid, arranged to allow positioning of the valve element within the valve chamber during a fabrication process.
An integrally formed valve comprising a valve support element and a lid, integrally connected together by a living hinge and together forming a valve chamber, the lid comprising an inlet opening to the valve chamber, the valve further comprising a valve element having a biasing spring, integrally formed together with the valve support element, the biasing spring acting to bias the valve element against a valve seat formed around the inlet opening.
Dependencies are inferred from the claim text.