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US 9,211,378 B2Granted
Methods and systems for dosing a medicament
AssigneeCeQur SA
InventorsChristopher S. Boit, Peter Gravesen, Heiko Arndt, Gregory H. Peatfield, Patrick F. McDermott
Life of this patent
Estimating the term…
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.
Claims25
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.
9 more elements
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, 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.
10 more elements
Dependencies are inferred from the claim text.