Fluidic dispensing device having a guide portion

A fluidic dispensing device, comprising:

• a housing having an exterior wall and a chamber, the exterior wall having a surface having an opening, the chamber having an interior space and having an inlet port and an outlet port, the inlet port being separated a distance from the outlet port;
• a fluid channel formed in the housing that connects the inlet port to the outlet port, the fluid channel being in fluid communication with the opening of the exterior wall;
• a stir bar located in the chamber, the stir bar having a rotational axis and a plurality of paddles that radially extend away from the rotational axis, each paddle of the plurality of paddles having a free end tip;
• and
• a guide portion that positions the rotational axis of the stir bar in a portion of the interior space such that the free end tip of each of the plurality of paddles rotationally ingresses and egresses a continuous ⅓ volume portion of the interior space of the chamber that includes the inlet port and the outlet port.

A fluidic dispensing device, comprising:

• a base wall;
• an exterior perimeter wall contiguous with the base wall and extends outwardly from the base wall, the exterior perimeter wall having an exterior wall portion having an opening adjacent to a chip mounting surface that defines a first plane, the base wall being oriented along a second plane substantially orthogonal to the first plane;
• a chamber located within a boundary defined by the exterior perimeter wall, the chamber having an interior perimetrical wall having an extent bounded by a proximal end and a distal end, the proximal end being contiguous with the base wall and the distal end defines a perimetrical end surface at a lateral opening of the chamber, the chamber having an interior space and having a port coupled in fluid communication with the opening;
• an ejection chip mounted to the chip mounting surface of the exterior wall, a planar extent of the ejection chip being oriented along the first plane, the ejection chip being in fluid communication with the opening, the ejection chip having a plurality of ejection nozzles;
• a lid that engages the exterior perimeter wall, the exterior perimeter wall being interposed between the base wall and the lid;
• a diaphragm positioned between the lid and the perimetrical end surface of the interior perimetrical wall, the diaphragm engaged in sealing engagement with the perimetrical end surface, the chamber and the diaphragm cooperating to define a fluid reservoir having a variable volume, the variable volume of the fluid reservoir having a first continuous ⅓ volume portion, a continuous central volume portion and a second continuous ⅓ volume portion, the continuous central volume portion separating the first continuous ⅓ volume portion from the second continuous ⅓ volume portion, the first continuous ⅓ volume portion being located closer to the ejection chip than the second continuous ⅓ volume portion;
• a stir bar located in the chamber, the stir bar having a rotational axis and a plurality of paddles that radially extend away from the rotational axis, each paddle of the plurality of paddles having a free end tip;
• and
• a guide portion that positions the rotational axis of the stir bar in a portion of the fluid reservoir such that the free end tip of each of the plurality of paddles of the stir bar rotationally ingresses and egresses the first continuous ⅓ volume portion that is closer to the ejection chip.