Methods and systems for dosing a medicament
First Claim
Patent Images
1. A mechanical pump system comprising:
- an actuation element;
a direct drive piston system comprising;
a piston chamber;
a piston disposed within the piston chamber;
a direct drive coupled to the actuation element for moving the piston relative to the piston chamber when the actuation element moves from a rest position to a fill end position to fill incrementally the piston chamber with medicament; and
a piston spring directly coupled to the piston for constantly biasing the piston to empty the piston chamber; and
a lost motion valve system comprising;
a valve chamber; and
a valve disposed within the valve chamber, wherein the valve is displaced from a fill position to a dosing position by contact with the actuation element after the actuation element travels beyond the fill end position.
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Abstract
A manually actuated pump, such as a bolus delivery circuit of an insulin pump, combines a direct drive piston system with a lost motion valve system, to deliver reliably a full bolus dose, while precluding partial dosing or inadvertent overdosing conditions. The pump may also include a signaling device to indicate when a full bolus dose is delivered.
235 Citations
25 Claims
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1. A mechanical pump system comprising:
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an actuation element; a direct drive piston system comprising; a piston chamber; a piston disposed within the piston chamber; a direct drive coupled to the actuation element for moving the piston relative to the piston chamber when the actuation element moves from a rest position to a fill end position to fill incrementally the piston chamber with medicament; and a piston spring directly coupled to the piston for constantly biasing the piston to empty the piston chamber; and a lost motion valve system comprising; a valve chamber; and a valve disposed within the valve chamber, wherein the valve is displaced from a fill position to a dosing position by contact with the actuation element after the actuation element travels beyond the fill end position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A mechanical pump system comprising:
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an actuation element; a direct drive piston system comprising; a piston chamber; a piston disposed within the piston chamber; a direct drive coupled to the actuation element for moving the piston relative to the piston chamber when the actuation element moves from a rest position to a fill end position to fill incrementally the piston chamber with medicament, wherein the direct drive comprises at least one of a rack and gear system and a cam and follower system; and a piston spring directly coupled to the piston for constantly biasing the piston to empty the piston chamber; and a lost motion valve system comprising; a valve chamber; and a valve disposed within the valve chamber, wherein the valve is displaced from a fill position to a dosing position after the actuation element travels beyond the fill end position. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification