Loading mechanism for infusion pump
First Claim
Patent Images
1. A drive assembly for an infusion pump, the assembly comprising:
- a. a barrel, the barrel characterized by a longitudinal barrel axis of rotation and a clearance hole in a barrel end;
b. a rotating drive screw, the drive screw having a longitudinal screw axis and exterior threads, the screw axis displaced from and parallel to the barrel axis; and
c. a plunger rod, the rod having threads at least part of its length, the rod inserted through the clearance hole, the rod threads removably engageable with the screw threads by rotating the barrel about the barrel axis.
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Abstract
A loading mechanism for a medication infusion pump. The mechanism includes a medication reservoir, a plunger, a threaded plunger rod offset from the axis of the reservoir and an infusion pump with a drive screw that is offset from the axis of a pump barrel. The pump barrel receives the assembly comprising the reservoir, plunger and plunger rod.
71 Citations
7 Claims
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1. A drive assembly for an infusion pump, the assembly comprising:
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a. a barrel, the barrel characterized by a longitudinal barrel axis of rotation and a clearance hole in a barrel end;
b. a rotating drive screw, the drive screw having a longitudinal screw axis and exterior threads, the screw axis displaced from and parallel to the barrel axis; and
c. a plunger rod, the rod having threads at least part of its length, the rod inserted through the clearance hole, the rod threads removably engageable with the screw threads by rotating the barrel about the barrel axis. - View Dependent Claims (2, 3, 4, 5, 7)
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6. A reservoir assembly for infusing fluids comprising:
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a. a reservoir of variable volume, the reservoir characterized by a longitudinal reservoir axis;
b. a plunger connected to the bottom of the reservoir; and
c. a plunger rod coupled to the plunger, the plunger when axially displaced causing a change in volume in the reservoir, the rod having threads at least part of its length, the threads capable of engagement with a drive screw having exterior threads and an axis displaced from, and parallel to, the reservoir axis.
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Specification