Patent ID: 8597243

Claim:
A reservoir having a plunger head moveable in an axial direction within the reservoir to convey fluidic media from the reservoir, the plunger head having a length dimension extending in the axial direction from a proximal end of the plunger head to a distal end of the plunger head, the reservoir comprising: a reservoir body portion having a wall defining an interior volume, the interior volume for containing the fluidic media, the reservoir having a channel opening in fluid flow communication with the interior volume of the reservoir body portion for allowing the fluidic media to be expelled from the interior volume of the reservoir body portion through a channel of the reservoir and out a port of the reservoir; and a bubble trap portion having a wall defining a volume in fluid flow communication with the interior volume of the reservoir body portion, the volume of the bubble trap portion for trapping air bubbles in the fluidic media as the fluidic media is expelled from the interior volume of the reservoir body portion, the wall of the bubble trap portion having a first portion that extends from the reservoir body portion away from the interior volume of the reservoir body portion beyond the channel opening in the axial direction, and a second portion that extends from the first portion toward the interior volume of the reservoir body portion, the second portion of the wall defining the channel opening, the volume of the bubble trap portion comprising a distal volume and a proximal volume, the proximal volume arranged closer to the interior volume of the reservoir body portion than the distal volume, wherein the distal volume is defined by a curved surface, and wherein the proximal volume is defined by a curved surface; the reservoir body portion having a rear end having an opening opposite the channel opening; the wall of the reservoir body portion having an interior surface facing the interior volume of the reservoir body portion, the interior surface having a diameter that is uniform from the bubble trap portion to the rear end of the reservoir body portion; wherein the length dimension of the bubble trap portion is smaller than the length dimension of the plunger head; wherein the reservoir is dimensioned such that the entire width dimension of the plunger head remains constant as the plunger head moves along the entire length dimension of the reservoir; and wherein the width dimension of the plunger head is transverse to the axial direction.