Abstract: A syringe pump may comprise a main housing. The pump may further comprise a drive head coupled to an elongate body extending out of the main housing. The drive head may comprise an actuator coupled to and rotatable with a threaded shaft, a clutch assembly, and a release body. The drive head may further comprise a carriage engaged with the threaded shaft and displaceable over a range in response to rotation of the shaft. The carriage may drive the release body upon displacement of the carriage. The clutch may transition from an engaged state to a disengaged state when the release body is displaced from a first to second position. The pump may further comprise a drive assembly configured to displace the drive head relative to the main housing. The drive assembly may include a leadscrew which is free to rotate when clutch assembly is in the disengaged state.

Abstract: A syringe pump may comprise a main housing. The syringe pump may further comprise a drive head coupled to a drive head tube and displaceable relative to the main housing. The drive head may include a means for positioning and retaining a plunger flange of a plunger of a syringe in alignment with a fiducial reference axis. The syringe pump may further comprise a means for positioning and retaining a barrel of the syringe in alignment with the fiducial reference axis. The syringe pump may further comprise a load cell assembly including a load cell and a contact in mechanical communication with the load cell. The contact may be disposed on the drive head and in alignment with the fiducial reference axis.