Mechanism for screw drive and syringe plunger...

Details Mechanism for screw drive and syringe plunger... Mechanism for screw drive and syringe plunger...

A - Human Necessities

61

M

128/82

A61M 5/00 (2006.01)

Patent

CA 1182705

ABSTRACT OF THE DISCLOSURE A mechanism for screw drive and syringe plunger engagement and disengagement for a syringe infusion pump, wherein a split-nut pair are moveable into and out of engagement with a lead screw by means of rotary cam control, the rotary cam being keyed with a crank disk that is coupled to a crank arm, which operates as the syringe plunger mover. The crank arm is rotatable into and out of engagement with the syringe plunger, such rotation also causing the split- nut pair to move into and out of engagement with the lead screw. Index and cam means are carried by the crank arm to aid in proper alignment with the syringe plunger, and a sensor is provided for monitoring proper engagement of the crank arm with the plunger.

451230

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