Infusion device with a grooved piston channel wall

Patent metadata

Field	Value
Publication number	US-8939737-B2
Application number	US-201314100944-A
Country	US
Kind code	B2
Filing date	Dec 9, 2013
Priority date	Oct 18, 2005
Publication date	Jan 27, 2015
Grant date	Jan 27, 2015

Abstract

An apparatus for delivering a fluid includes a housing, an inlet in the housing for receiving the fluid, and an outlet in the housing for discharging the fluid. A piston channel is provided within the housing through which the fluid flows from the inlet to the outlet. An actuator is positioned within the housing and is moveable between a retracted position and a forward position, the actuator defining a piston chamber for storing fluid received through the inlet when the actuator is in the retracted position and for driving the fluid stored in the piston chamber toward the outlet when the actuator transitions from the retracted position to the forward position. The actuator includes an armature and a piston coupled to the armature and moveable within the piston channel. The piston channel wall is provided with a groove for conducting fluid from the inlet to the outlet.

First claim

What is claimed is:

1. An apparatus for delivering a fluid, the apparatus comprising:
a housing;
an inlet in the housing for receiving the fluid;
an outlet in the housing for discharging the fluid;
a piston channel within the housing through which the fluid flows from the inlet to the outlet, the piston channel having a piston channel wall with at least one groove provided therein; and
an actuator positioned within the housing and moveable between a retracted position and…

Assignees

• Medtronic Minimed Inc

Inventors

• Gray John

Classifications

• A61M5/14236 Primary

  Human Necessities · mapped topic

• A61M5/14276

  Human Necessities · mapped topic

• F04B17/048

  Mechanical Engineering · mapped topic

• A61M5/14216 Primary

  Human Necessities · mapped topic

• A61M5/168

  Human Necessities · mapped topic