Patent ID: 9526847
Filing Date: 2016-12-27
CPC Classification: A61M

Claim Text:
1. A syringe and safety device comprising a syringe body with a needle hub extending from a distal end and a needle shaft extending from the needle hub, the needle hub having a first latch member, a helical spiral coil spring coupled at a proximal end to the needle hub, and a needle cover coupled to the helical spiral coil spring at a distal end and slidably receivable over the needle shaft, the needle cover having a second latch member cooperatable with the first latch member to retain the needle cover in a first retracted position along the needle shaft, wherein when the needle cover is retained in the first retracted position the helical spiral coil spring is biased to urge the needle cover to move to a second position partially beyond a distal tip of the needle shaft and oriented at an angle relative to a longitudinal axis of the needle shaft preventing the needle shaft from re-emerging from the needle cover, axis of the needle shaft preventing the needle shaft from re-emerging from the needle cover, wherein the helical spiral coil spring is biased to axially and rotationally urge the second latch member into engagement with the first latch member to retain the needle cover in the first retracted position, wherein the needle cover is moveable proximally in an axial direction from the first refracted position to passively disengage the second latch member from the first latch member due to a proximal force exerted on the needle cover from contact with a patient's tissue during insertion of the needle shaft into the patient's tissue and upon proximal movement of the needle cover from the first retracted position, the spring being biased to rotationally urge the second latch member away from the first latch member to avoid reengagement of the first and second latch members upon distal movement of the needle cover as the needle shaft is withdrawn from the patient.