Infusion pump assembly

Patent metadata

Field	Value
Publication number	US-9446188-B2
Application number	US-201414159134-A
Country	US
Kind code	B2
Filing date	Jan 20, 2014
Priority date	May 18, 2001
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

Abstract

An infusion pump assembly includes a locking tab and a pump barrel inside a pump barrel housing, where the pump barrel accommodates a reservoir assembly. The reservoir assembly includes a reservoir and a plunger rod. The infusion pump assembly also includes a locking disc at a terminus of the pump barrel. The locking disc includes a clearance hole for the plunger rod. The locking disc also includes at least one locking tab notch in close proximity with the locking tab. The locking tab is in moveable engagement with the locking tab notch, and the reservoir moves the locking tab from a locked position to an unlocked position when the plunger rod is inserted through clearance hole. The locking disc rotates upon torque being applied to the reservoir assembly, the locking disc rotating from a non-loaded position to a loaded position with respect to the plunger rod and a drive screw.

First claim

What is claimed is:

1. An infusion pump device for delivering infusible fluid to a user, the device comprising:
a reusable pump portion comprising a motor assembly;
a disposable portion in removable relation to the reusable pump portion, the disposable portion comprising a plunger rod, the plunger rod connected to the plunger and extending away from the plunger to a distal end, the plunger rod having a threaded portion; and
processing logic for executing one or more processes in the reusable pump portion,
wherein when the disposable portion is attached to the reusable pump portion the plunger rod is engaged with the motor assembly, and
wherein the plunger rod is displaceable by the motor assembly, and
wherein the processing logic configured to monitor a displacement of the plunger rod to determine if the plunger rod was displaced an expected displacement in response to displacement by the motor assembly; and
wherein if the plunger rod was not displaced the expected displacement, initiating an alarm sequence on the infusion pump device.

2. The device in claim 1 further comprising a battery assembly configured to power the infusion pump device, wherein the processing logic configured to:
compare an actual voltage level of the battery assembly to a minimum voltage requirement to determine if the actual voltage level meets the minimum voltage requirement; and
if the actual voltage level does not meet the minimum voltage requirement, initiating an alarm sequence on the infusion pump device.

3. The device in claim 1 wherein the motor assembly comprises a nut assembly.

4. The device of claim 1 wherein the reusable pump portion is configured to receive the disposable portion.

5. The device of claim 1 wherein the plunger assembly comprises at least one seal.

6. The device of claim 1 wherein the disposable portion further comprises a needle.

7. The device of claim 1 wherein the disposable portion further comprises a rubber septum.

8. The device of claim 7 wherein the disposable portion further comprises a needle, wherein when the disposable portion is attached to the reusable pump portion, the needle pierces the septum.

9. An infusion pump device for delivering infusible fluid to a user, the device comprising:
a reusable pump portion comprising a motor assembly;
a disposable portion in removable relation to the reusable pump portion, the disposable portion comprising:
a plunger rod, the plunger rod connected to the plunger and extending away from the plunger to a distal end, the plunger rod having a threaded portion extending over an entire length of the plunger rod from the plunger to the distal end; and

processing logic for executing one or more processes in the reusable pump portion;
wherein the plunger rod is displaceable by the motor assembly; and
wherein the processing logic is configured to monitor a displacement of the plunger rod to determine if the plunger rod was displaced an expected displacement in response to displacement by the motor assembly.

10. The device of claim 9 wherein the disposable portion further comprises a needle.

11. The device of claim 9 wherein the disposable portion further comprises a rubber septum.

12. The device of claim 11 wherein the disposable portion further comprises a needle, wherein when the disposable portion is attached to the reusable pump portion, the needle pierces the septum.

13. The device of claim 9 wherein the plunger assembly further comprises at least one seal.

14. The device of claim 9 wherein and if the plunger rod was not displaced the expected displacement, initiating an alarm sequence on the infusion pump device.

15. An infusion pump device for delivering infusible fluid to a user, the device comprising:
a pump portion comprising a motor assembly wherein the motor assembly comprising a nut assembly,
a reservoir in removable relation to the pump portion, the reservoir comprising:
a plunger rod, the plunger rod connected to the plunger and extending away from the plunger to a distal end, the plunger rod having a threaded portion extending over an entire length of the plunger rod from the plunger to the distal end, and

processing logic for executing one or more processes in the reusable pump portion,
wherein the plunger rod is displaceable by the nut assembly,
wherein the processing logic configured to:
monitor a displacement of the plunger rod to determine if the plunger rod was displaced an expected displacement in response to displacement by the motor assembly, and
if the plunger rod was not displaced the expected displacement, initiating an alarm sequence on the infusion pump device, and

wherein the pump portion is durable and the reservoir is disposable.

16. The device of claim 15 wherein the plunger assembly comprises at least one seal.

17. The device of claim 15 wherein the reservoir further comprises a rubber septum.

Assignees

• Deka Products Lp

Inventors

• Grant Kevin L
• Tracey Brian L
• Mandro Marc Aurele
• Bryant Jr Robert John

Classifications

• A61M39/14

  for connecting tubes having sealed ends {(needle sets A61M5/162; having valves closing automatically on disconnection of line A61M39/26)} · CPC title

• A61M2205/50

  with microprocessors or computers · CPC title

• Y10T29/494

  Fluidic or fluid actuated device making · CPC title

• A61M5/142

  Pressure infusion, e.g. using pumps · CPC title

• A61M5/145

  using pressurised reservoirs, e.g. pressurised by means of pistons · CPC title