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 configured to be coupled to a patient;
- and
- a pump system coupled to the reservoir and to the fluid path component, the pump system including:
- a piston pump block;
- a first septum positioned within the piston pump block;
- a second septum positioned within the piston pump block, wherein the first septum and the second septum are fitted into open areas of the piston pump block;
- a first piston configured to move within a first piston pump chamber, the first piston and the first piston pump chamber positioned on a first side of the first and second septa;
- a second piston configured to move within a second piston pump chamber, the second piston and the second piston pump chamber positioned on a second, opposite side of the first and second septa;
- and
- a tube component extending through the piston pump block, the first septum, and the second septum and positioned between the first and second pistons and the first and second piston pump chambers, wherein the tube component comprises a first side port, a second side port, and a center plug positioned between the first and second side ports, the first side port coupled to an inlet component portion of the tube component and the second side port coupled to an outlet component portion of the tube component,
- wherein the tube component is selectively moved to couple the first side port to the first piston pump chamber and the second side port to the second piston pump chamber or to couple the first side port to the second piston pump chamber and the second side port to the first piston pump chamber, and
- wherein the first and second pistons are selectively moved to draw in the liquid drug from the reservoir to the first piston pump chamber from the inlet component portion and to expel the liquid drug from the second piston pump chamber through the outlet component portion to the fluid path component when the first side port is coupled to the first piston pump chamber and the second side port is coupled to the second piston pump chamber or to draw in the liquid drug from the reservoir to the second piston pump chamber and to expel the liquid drug from the first piston pump chamber to the fluid path component when the first side port is coupled to the second piston pump chamber and the second side port is coupled to the first piston pump chamber.
Dependencies are inferred from the claim text.