Drug infusion pumping cassette latching mechanism

Apparatus for engaging a pumping cassette at a predefined position within a pump chassis that is used to deliver fluids to a patient, comprising:

• (a) a pair of opposed pivotable members disposed at opposite sides of a cavity within the pump chassis, said cavity being sized to receive a pumping cassette, each of said pair of opposed members being pivotally mounted to the pump chassis so as to pivot away from and towards the cavity and including a surface configuration that engages a portion of a pumping cassette, retaining the cassette in the predefined position within the cavity;
• and
• (b) at least one spring coupled to said pair of opposed members, said at least one spring applying a biasing force tending to pivot said pair of opposed members towards the cavity, so that as a pumping cassette is forced into the cavity, the opposed members are pivoted outwardly, away from each other and from the cavity, said biasing force causing said surface configuration on each of the pair of opposed members to engage the pumping cassette after it has been forced into the cavity, retaining the pumping cassette at the predefined position.

Apparatus for engaging a pumping cassette at a predefined position within a pump chassis that is used to deliver fluids to a patient, comprising:

• (a) a pivotable member disposed at a side of a cavity within the pump chassis, said cavity being sized to receive a pumping cassette, said pivotable member being pivotally mounted to the pump chassis so as to pivot away from and towards the cavity and including a surface configuration that engages a portion of a pumping cassette in the predefined position within the cavity;
• and
• (b) a biasing element coupled to said pivotable member, said biasing element applying a biasing force tending to pivot said pivotable member towards the cavity, so that as a pumping cassette is forced into the cavity, said pivotable member is pivoted away from the cavity, said biasing force causing said surface configuration of the pivotable member to engage the pumping cassette after it has been forced into the cavity, retaining the pumping cassette at the predefined position.