AUTOMATIC SELF-DISPENSING ACCURATE DOSE DRUG DELIVERY SYRINGES

摘要

An automatic accurate dose syringe includes a barrel, a plunger seal, a barrel adapter assembly having a barrel tip and a needle, and a dose control mechanism having a plunger having a coarse pitch screw on its exterior surface, a housing having a corresponding coarse pitch guide along the interior surface of the housing, a screw having a fine pitch screw which interfaces with a fine pitch nut of an adapter, wherein the plunger has an internal annular space within which screw at least partially resides. The syringe further includes a locking mechanism, an activation button, and a biasing member such as a compression and/or a torsional spring. The components are configured such that actuation of the activation button by the user manipulates the locking mechanism to permit the biasing member to move from an initial energized state to a lower energy state, thereby automating drug delivery from the syringe.

主权项

1. An automated dose control mechanism 100 for a syringe 102 having a barrel 104 and a plunger seal 114, the dose control mechanism 100 comprising:
a plunger assembly 122 adapted to be connected to the syringe 102 to provide movement to the plunger seal 114, an automatic administration assembly 124 including an administration mechanism 182 adapted and disposed to provide movement to the plunger assembly 122, a locking mechanism 184 adapted to be selectively disposed in an engaged position and a disengaged position, wherein the engaged position prevents the administration mechanism 182 from providing movement to the plunger assembly 122, and the disengaged position does not prevent the administration mechanism 182 from providing movement to the plunger assembly 122, and an actuator 186, the actuator 186 disposed to selectively disengage the locking mechanism 184 whereby the administration mechanism 182 provides movement to the plunger assembly 122 when the locking mechanism 184 is disengaged without requiring further actuation.