Combined medical device with sliding frontal attachment and retractable needle

A medical device comprising:

• a connector housing, a frontal attachment, a needle projecting forwardly from the frontal attachment, a needle retraction mechanism, and a locking needle cover;
• the connector housing further comprising a forwardly facing surface with a first opening communicating with a rearwardly facing connector for another associated medical device and a second opening communicating with a rearwardly projecting needle retraction cavity;
• the frontal attachment further comprising a base with a forwardly projecting needle support having a stepped internal bore and a rearwardly facing surface with an opening into the stepped internal bore;
• the forwardly facing surface of the connector housing and the base and rearwardly facing surface of the frontal attachment each further comprising a plurality of cooperatively engaged rails disposed in sliding engagement along at least one sliding interface substantially transverse to the needle and needle retraction cavity with the needle retraction mechanism disposed in the stepped internal bore of the frontal attachment so that the opening into the stepped internal bore is disposed opposite the first opening in the forwardly facing surface of the connector housing and the needle is biased rearwardly by the needle retraction mechanism;
• and
• the locking needle cover comprising a rearwardly extending locking arm that is inserted into the second opening of the forwardly facing surface of the connector housing to restrict relative sliding movement between the forwardly facing surface of the connector housing and the rearwardly facing surface of the frontal attachment prior to use of the subject medical device;
• whereby the connector housing is engaged with and is slidable in relation to the frontal attachment in a direction substantially transverse to the longitudinal axis through the retractable needle following removal of the locking needle cover and until the connector housing is repositioned by sliding it transversely relative to the frontal attachment to align the needle retraction cavity with the needle and the needle retraction mechanism to initiate retraction of the needle to a safe position with no part of the needle still projecting forwardly from the frontal attachment.