ELASTOMERIC CONNECTOR COUPLING MOTOR TO CAM ACTUATOR OF INFUSION PUMP

A resilient coupling assembly for transmitting a rotational drive force from a first shaft to a second shaft, comprises: (a) a generally elongate elastomeric member having: (i) a first orifice disposed at one end of the elastomeric member and sized to provide an interference fit over the first shaft...

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Bibliographische Detailangaben
Hauptverfasser:	SCHERER, ANDREW J, GJATA, JOHN D, LAWLESS, MICHAEL W, SOBERON, PETER A, SQUARCIA, STEPHANIE R
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BLASTING BRAKES CLUTCHES COUPLINGS FOR TRANSMITTING ROTATION DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HUMAN NECESSITIES HYGIENE LIGHTING MECHANICAL ENGINEERING MEDICAL OR VETERINARY SCIENCE POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A resilient coupling assembly for transmitting a rotational drive force from a first shaft to a second shaft, comprises: (a) a generally elongate elastomeric member having: (i) a first orifice disposed at one end of the elastomeric member and sized to provide an interference fit over the first shaft; and (ii) a second orifice disposed at an opposite end of the elastomeric member and sized to provide an interference fit over the second shaft; and (b) an elongate sleeve having a central opening that is sized to provide an interference fit over an outer surface of the elastomeric member and providing a compressive force against the elastomeric member that retains the elastomeric member on at least one of the first and the second shafts, so that the shafts are coupled together through the elastomeric member, wherein the sleeve comprises an elastomeric material that is overmolded onto a rigid material; and a drive mechanism for a pump cassette, comprises: (a) a shaft mounted on a chassis and adapted to be rotationally driven by a prime mover, said shaft rotating a cam surface; (b) a plunger having a first end coupled to the cam surface and an opposed second end, said plunger being mounted to reciprocate back and forth in two opposed directions, said first end of the plunger being driven in a first direction, towards the pump cassette, by a force applied to the plunger by the cam surface as the shaft rotates; and (c) an elastomeric membrane exposed in an opening formed on a surface of the pump cassette, said pump cassette being removably mounted to the chassis in a predefined position, so that the opening is disposed adjacent the second end of the plunger, said second end of the plunger displacing the elastomeric membrane into an interior of the pump cassette to force a fluid to flow through the pump cassette, said elastomeric membrane providing a restoring force that biases the plunger to move in a second direction, toward the cam surface, so that the cam surface does not apply a force to move the plunger in the second direction.