Time delay mechanism for a hydraulic drug delivery device
AssigneeMannKind Corporation
InventorsChristopher Gregory, Geoffrey Jenkins
Life of this patent
Estimating the term…
Abstract
A medicament delivery device may comprise a medicament chamber configured to hold a medicament, a plunger configured to move relative to the medicament chamber to expel the medicament from the medicament chamber, a pin configured to move from a first pin position wherein the pin prevents movement of the plunger to a second pin position wherein the pin allows movement of the plunger, an actuation assembly configured to move the pin from the first pin position to the second pin position, and a needle coupled to the medicament chamber. The medicament may flow through the needle from the medicament chamber to a user. The actuation assembly may be configured to automatically move the pin after a predetermined time delay.
Claims9
A medicament delivery device comprising:
- a first chamber including a first plunger, the first plunger configured to move relative to the first chamber;
- a second chamber fluidly connected to the first chamber, the second chamber including a second plunger and configured to receive fluid from the first chamber when the first plunger moves relative to the first chamber, the second plunger configured to move relative to the second chamber as the fluid is transferred from the first chamber to the second chamber;
- a third chamber including a third plunger, the third chamber fluidly connected to the first chamber, wherein the third chamber is configured to contain a medicament, the third plunger configured to move relative to the third chamber after a pre-determined time delay from when the first plunger moves relative to the first chamber;
- a biasing element configured to move the first plunger relative to the first chamber;
- and
- a needle coupled to the third chamber, the needle configured to provide a pathway for the medicament to flow from the third chamber to a user as the third plunger moves relative to the third chamber,
- wherein the first chamber includes a distal portion between a distal end of the first chamber and the first collar,
- wherein the first chamber includes a proximal portion between the first collar and the second collar, and
- wherein the first chamber includes a bypass, wherein the fluid flows from the distal portion through the bypass and into the proximal portion as the first plunger moves relative to the first chamber.
Dependencies are inferred from the claim text.