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US 2010/0063455 A1Published application
Safety needle assembly and methods
AssigneeB. Braun Medical Inc.
InventorsScott A. Moyer, Michael J. Janders
Life of this patent
Estimating the term…
Abstract
Embodiments of the present safety needle assembly include a slidable needle shield. Digital pressure applied to a leaf spring retention latch removes a compressive force from a biasing member and automatically moves the needle shield from a ready-to-use configuration to a protected configuration in which the needle shield covers the sharp needle tip. In the protected configuration the needle shield is prevented from sliding proximally along the needle a sufficient distance to expose the needle tip.
Claims28
A safety needle assembly, comprising:
- an elongate body including a body wall defining an internal passageway and including an opening in the body wall;
- a needle hub engaging a proximal end of the body and being stationary with respect to the body;
- a needle extending distally from the needle hub and through the body internal passageway, the needle including a sharp distal tip;
- a needle shield disposed within the body internal passageway and surrounding a portion of the needle, the needle shield being slidable with respect to the body and with respect to the needle;
- a biasing element engaging the needle shield and biasing the needle shield toward a distal end of the needle;
- and
- a release latch extending from the needle shield, the release latch comprising a leaf spring having a detent;
- wherein when the assembly is in a ready-to-use configuration the detent engages an edge of the opening in the body wall and prevents movement of the needle shield distally with respect to the body and with respect to the needle, and further wherein digital pressure applied to the release latch disengages the detent from the edge of the opening in the body wall and enables movement of the needle shield distally with respect to the body and with respect to the needle.
5 more elements
A method of manufacturing a safety needle assembly. the method comprising:
- providing an elongate body including a body wall defining an internal passageway and including an opening in the body wall;
- engaging a wing with the body such that the wing extends laterally from the body. the wing including a substantially planar portion configured to lie against a patient's skin for securing the assembly to the patient;
- engaging a needle hub with a proximal end of the body, such that a needle having a sharp distal tip extends through the body internal passageway and out a distal end of the body, the needle hub being stationary with respect to the body;
- positioning a needle shield within the body internal passageway such that the shield surrounds a portion of the needle and the shield is slidable with respect to the body and with respect to the needle, but the shield is substantially not rotatable with respect to the body;
- compressing a biasing element between the needle hub and the needle shield such that the biasing element biases the needle shield toward a distal end of the needle;
- and
- engaging a release latch extending from the needle shield with an edge of the opening in the body wall such that the release latch prevents movement of the needle shield distally with respect to the body and with respect to the needle.
4 more elements
A method of shielding a needle in a safety needle assembly, the method comprising:
- grasping an elongate body of the assembly in a ready-to-use configuration, the elongate body including a body wall defining an internal passageway and including an opening in the body wall, the internal passageway enclosing a portion of a needle having a sharp distal tip, the sharp distal tip extending beyond an open end of the body;
- and
- depressing a release latch to thereby disengage a detent of the release latch from an edge of the opening in the body wall, disengagement of the detent from the opening releasing a compressive force on a biasing member and causing a needle shield disposed within the body internal passageway to slide distally with respect to the body and with respect to the needle and to cover the needle distal tip;
- wherein the needle is held in a needle hub that engages a proximal end of the body and is stationary with respect to the body, such that when the release latch is depressed neither the needle nor the needle hub moves with respect to the body.
1 more element
A safety needle assembly comprising
- an elongate body including a body wall defining an internal passageway and including an opening in the body wall;
- a needle hub engaging a proximal end of the body and being stationary with respect to the body and having a needle extending distally from the needle hub and through the body internal passageway, the needle including a sharp distal tip;
- a needle shield disposed within the body internal passageway and surrounding a portion of the needle, the needle shield being slidable with respect to the body and with respect to the needle and having an elongated section having a proximal opening, an internal bore of a first diameter, a release latch comprising a leaf spring extending from the elongated section, and a plurality of proximally extending retention latches each comprising leg and a detent;
- a biasing element engaging the needle shield and biasing the needle shield toward a distal end of the needle;
- and
- wherein the release latch is engaged to the opening in the body wall to maintain the biasing element in a compressed state.
3 more elements
Dependencies are inferred from the claim text.