Patent ID: 8016790

Claim:
An indicator device for indicating the status of a flow of a fluid through an infusion line, the indicator device comprising: a housing surrounding a cavity through which the fluid may flow, the housing having a fluid inlet adapted to be coupled to a portion of the infusion line from which the fluid would flow into the housing, a fluid outlet adapted to be coupled to a portion of the infusion line into which the fluid would flow out of the housing, and an indicator opening; a flexible membrane disposed at the indicator opening in contact with the fluid in the cavity, the flexible membrane having a moveable membrane portion configured to move in relation to the indicator opening in response to pressure of the fluid in the cavity to provide distinguishable cues of a status of the flow of the fluid through the infusion line; and a position indicator disposed in the vicinity of the center of the moveable membrane portion and on an exterior surface of the indicator device, the position indicator configured to provide, by reciprocating linear movement in response to the status of the flow of the fluid through the fluid line, a tactile indication of a position of the moveable membrane portion with respect to the indicator opening.