Patent ID: 9028452
Filing Date: 2015-05-12
Classification: A61M

Abstract:
1. The safety needle pack comprising: a safe needle device having a forward end and a rearward end, and comprising a needle hub adapted for connection to a syringe, a medical needle supported by and projecting forwardly from the needle hub and having a sharp tip remote from the hub, a sleeve having an external surface and being slidably mounted on the needle hub, a locking mechanism for the sleeve, and a spring mechanism for biasing the sleeve forwardly with respect to the needle hub; the sleeve is arranged to slide relative to the hub between a protecting position in which the tip of the needle is located inside the sleeve, through an intermediate position in which the tip of the needle projects from the sleeve, and a retracted position in which a greater length of the needle is exposed, such that in use, relative sliding between the sleeve and the hub sets the sleeve to the intermediate position ready for performing an injection, and then as the needle is inserted into a patient, the sleeve slides over the hub to the retracted position against the action of the spring mechanism, so that on removal of the needle from the patient the spring mechanism moves the sleeve to the protecting position, said locking mechanism then restraining the sleeve in the protecting position; and a housing for removably containing the safe needle device prior to use, said housing having a forward end and an open rearward end and an inner surface therebetween, such that when the safe needle device is located within the housing, the inner surface of the housing is disposed around the outer surface of the sleeve, the forward end of the housing covers at least the tip of the needle and the needle hub is exposed through the rearward end of the housing; wherein the safe needle device is received rotatably within the housing, and the safe needle device and the housing are configured such that connection of the syringe to the hub by rotation of the syringe turns the safe needle device within the housing to cause said relative sliding of the sleeve and the hub, setting the sleeve to said intermediate position; the safe needle device comprises a detent arrangement for retaining the sleeve and hub in the intermediate position against the action of the spring mechanism until the sleeve is moved further towards the retracted position, whereby the safe needle device may be removed from the housing with the sleeve and hub held in the intermediate position for performing an injection.