Safety syringe
AssigneeOwen Mumford Limited
InventorDamian Alexander Holland
Life of this patent
Estimating the term…
Abstract
An apparatus for use with a syringe for providing a safety syringe, the safety syringe including a plunger configured during an inward stroke to expel a substance from a hypodermic needle attached at an open end of a barrel of the syringe, the apparatus including: a biasing member configured to bias a sheath towards a closed position at least partially covering the hypodermic needle, wherein the biasing member is configured to be released at a point on the inward stroke of the plunger to urge the sheath towards the closed position.
Claims16
An apparatus for use with a syringe for providing a safety syringe, the apparatus comprising:
- a plunger configured during an inward stroke to expel a substance from a hypodermic needle attached at an open end of a barrel of the syringe:
- a biasing member configured to bias a sheath towards a closed position at least partially covering the hypodermic needle,
- wherein the biasing member is configured to be released at a point on the inward stroke of the plunger to urge the sheath towards the closed position, wherein the plunger is coupled to the sheath for axial movement therewith during the inward stroke and is configured to decouple from the sheath at a release point to release the biasing member,
- wherein the plunger further comprises a resiliently deformable arm configured to release the biasing member at said release point on deflection of the resiliently deformable arm by a deflection surface of the sheath.
A kit of parts comprising:
- a sheath;
- a biasing member;
- and
- a syringe comprising a plunger, the biasing member being configured to bias the sheath towards a closed position at least partially covering a hypodermic needle of the syringe,
- wherein the biasing member is configured to be released at a point on an inward stroke of the plunger to urge the sheath towards the closed position,
- wherein the plunger is coupled to the sheath for axial movement therewith during the inward stroke and is configured to decouple from the sheath at a release point to release the biasing member, and
- wherein the plunger further comprises a resiliently deformable arm configured to release the biasing member at said release point on deflection of the resiliently deformable arm by a deflection surface of the sheath.
Dependencies are inferred from the claim text.