Infusion pump system and method
First Claim
Patent Images
1. A portable infusion pump system, comprising:
- a pump housing that defines a space to receive a medicine cartridge; and
a drive system to dispense medicine from the medicine cartridge when the medicine cartridge is received by the pump housing, the drive system comprising;
a piston rod configured to forwardly advance toward the medicine cartridge when the medicine cartridge is received by the pump housing, and a plunger engagement device coupled to the piston rod,wherein the plunger engagement device comprises at least one penetration member to couple the drive system to a plunger of the medicine cartridge, and a spring adjustable from a deactivated condition to an activated condition in which a spring force of the spring biases the plunger towards the piston rod in a direction opposite of a forward direction of the piston rod when the piston rod is forwardly advanced toward the medicine cartridge when the medicine cartridge is received by the pump housing.
8 Assignments
0 Petitions
Accused Products
Abstract
Some embodiments of an infusion pump system include a pump device with a drive system that is configured to attach with a medicine cartridge in manner that reduces the likelihood of dosage inaccuracies. In one example, the drive system of the pump device can be equipped with a plunger engagement device that is configured to mechanically anchor into a plunger of the medicine cartridge, and then to bias the plunger of the medicine cartridge in a direction toward a piston rod of the drive system.
-
Citations
21 Claims
-
1. A portable infusion pump system, comprising:
-
a pump housing that defines a space to receive a medicine cartridge; and a drive system to dispense medicine from the medicine cartridge when the medicine cartridge is received by the pump housing, the drive system comprising;
a piston rod configured to forwardly advance toward the medicine cartridge when the medicine cartridge is received by the pump housing, and a plunger engagement device coupled to the piston rod,wherein the plunger engagement device comprises at least one penetration member to couple the drive system to a plunger of the medicine cartridge, and a spring adjustable from a deactivated condition to an activated condition in which a spring force of the spring biases the plunger towards the piston rod in a direction opposite of a forward direction of the piston rod when the piston rod is forwardly advanced toward the medicine cartridge when the medicine cartridge is received by the pump housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A portable infusion pump system, comprising:
-
a pump housing that defines a space to receive a medicine cartridge; a drive system to dispense medicine from the medicine cartridge when the medicine cartridge is received by the pump housing, the drive system comprising;
a piston rod configured to forwardly advance toward the medicine cartridge when the medicine cartridge is received by the pump housing, and a plunger engagement device coupled to the piston rod; anda controller device removably attachable to the pump housing so as to electrically connect with a pump device comprising the pump housing and the drive system, wherein the controller device houses control circuitry configured to communicate with the drive system positioned in the pump housing to control dispensation of the medicine from the pump device, wherein the plunger engagement device comprises;
a piston hub coupled to the piston rod, a retention plate having an aperture that encompasses a portion of the piston rod, at least one penetration member supported by the retention plate to couple the drive system to a plunger of the medicine cartridge, and a spring seated between the piston hub and the retention plate, andwherein the spring is adjustable from a deactivated condition to an activated condition in which a spring force of the spring biases the retention plate away from the piston hub to pull the plunger against a surface of the piston hub. - View Dependent Claims (13, 14, 15, 16)
-
-
17. A portable infusion pump system, comprising:
-
a pump housing that defines a space to receive a medicine cartridge; and a drive system to dispense medicine from the medicine cartridge when the medicine cartridge is received by the pump housing, the drive system comprising;
a piston rod configured to forwardly advance toward the medicine cartridge when the medicine cartridge is received by the pump housing, and a plunger engagement device coupled to the piston rod,wherein the plunger engagement device comprises at least one means for penetrating a plunger of the medicine cartridge, and a means for biasing the plunger towards the piston rod in a direction opposite of a forward direction of the piston rod when the piston rod is forwardly advanced toward the medicine cartridge when the medicine cartridge is received by the pump housing by adjusting from a deactivated condition to an activated condition.
-
-
18. A method of operating an infusion pump device, comprising:
-
receiving a medicine cartridge in an internal space of a housing of a pump device, wherein a plunger engagement device is positioned in the internal space; penetrating a plunger of the medicine cartridge with at least one penetration member of the plunger engagement device; and after penetrating the plunger with said at least one penetration member, applying a spring bias of a spring to the plunger to bias the plunger towards a piston rod of a drive system of the pump device, wherein the spring biases the plunger towards the piston rod in a direction opposite of a forward direction of the piston rod when the piston rod is forwardly advanced toward the medicine cartridge when the medicine cartridge is received by the pump housing. - View Dependent Claims (19, 20, 21)
-
Specification