Micro piston pump
AssigneeInsulet Corporation
InventorsDaniel Allis, Ian McLaughlin, Kenneth Phillips
Life of this patent
Estimating the term…
Abstract
A low-force, non-displacement, micro/miniature valve and/or pump assembly is provided. A tube component having a first side port coupled to an inlet portion and a second side port coupled to an outlet portion can be selectively moved to alternatively couple the side ports to a first or second piston pump chamber. First and second pistons can be actuated after positioning the tube component to either draw in fluid or push out fluid from either the first or second piston pump chambers during each actuation of the pistons. The fluid can be drawn in from a reservoir and can be expelled to a patient for providing a dose of the fluid to the patient.
Claims20
A drug delivery device, comprising:
- a reservoir configured to store a liquid drug;
- a fluid path component fluidly coupled to a cannula;
- and
- a pump assembly coupled to the reservoir and to the fluid path component, the pump assembly including:
- an actuator linkage, and
- a piston pump block positioned between a first piston plate and a second piston plate, the piston pump block including a tube component extending through the piston pump block, a first septum, and a second septum and positioned between a first piston and a second piston, wherein the tube component has a first side port, a second side port, and a center plug positioned between the first side port and the second side port, wherein the first piston plate is coupled to the first piston and the second piston plate is coupled to the second piston;
- and
- wherein the first piston plate includes a first bi-stable spring coupled to a first extension component of a pump base, and the second piston plate includes a second bi-stable spring coupled to a second extension component of the pump base.
A drug delivery system, comprising:
- a reservoir configured to store a liquid drug;
- a fluid path component fluidly coupled to a cannula;
- and
- a pump assembly coupled to the reservoir and to the fluid path component, the pump assembly including:
- an actuator linkage, and
- a piston pump block positioned between a first piston plate and a second piston plate, the piston pump block including a tube component extending through the piston pump block, a first septum, and a second septum and positioned between a first piston and a second piston;
- wherein the tube component has a first side port, a second side port, and a center plug positioned between the first side port and the second side port;
- wherein during a first stage of operation, the tube component is moved to couple the first side port to a first piston pump chamber and to couple the second side port to a second piston pump chamber;
- wherein during a second stage of operation, the first and second pistons are moved in a first direction along a first central axis of the pump assembly to draw the liquid drug into the first piston pump chamber and to expel the liquid drug from the second piston pump chamber through the second side port and an outlet component portion;
- and
- wherein during a third stage of operation, the tube component is moved in a first direction parallel to a second central axis of the pump assembly to couple the first side port to the second piston pump chamber and to couple the second side port to the first piston pump chamber.
A pump assembly, comprising:
- an actuator linkage, and
- a piston pump block positioned between a first piston plate and a second piston plate, the piston pump block including a tube component extending through the piston pump block, a first septum, and a second septum and positioned between a first piston and a second piston, wherein the tube component has a first side port, a second side port, and a center plug positioned between the first side port and the second side port, wherein the first piston plate is coupled to the first piston and the second piston plate is coupled to the second piston;
- the actuator linkage coupled to the first piston plate and the second piston plate;
- and
- wherein the first piston plate includes a first bi-stable spring coupled to a first extension component of a pump base, and the second piston plate includes a second bi-stable spring coupled to a second extension component of the pump base.
Dependencies are inferred from the claim text.