Ivac Corporation

Cardinal Health 303, Inc.

Spyros Kasvikis

Matthew G Morris

Simon E Finburgh

Donald Frederic Schwartz

Richard W Herrmann

A syringe plunger driver system capable of capturing syringes of widely varying sizes comprises a pair of asymmetric plunger retainer arms pivotally mounted to a plunger driver. The system includes a low profile driver having a length that exceeds its width so that it may be mounted adjacent control modules and other operational modules. The arms are biased toward each other and one arm is longer than the other with a notch on an inside edge to receive the tip of the shorter arm when capturing small syringe flanges. A rotation knob mounted to the front surface of the low profile driver forces the arms apart when rotated to a first rotation position. A force sensor is mounted in the driver to detect occlusions in the fluid line. A processor monitors the force sensed by the force sensor and provides an alarm if the force exceeds a threshold. The driver includes a force concentrator that defines a pushing surface adapted to press against a plunger flange so that the force applied to the plunger flange is concentrated at a defined location for more accurate measurement.

Syringe plunger driver system

A fluid flow control system having a valve disposed in-line with a fluid conduit extending between a fluid container and a fluid receiver. The conduit and valve are designed to be used with a fluid infusion device such as a peristaltic pump. The valve is non-clamping and includes a rotatable member with an external handle for controlling the valve between flow and flow stop positions. The handle can be manually operated as well as automatically operated. Mounted to the infusion device is an automatic operating mechanism for cooperating with the pumping mechanism of the infusion device to control the position of the valve. In a disclosed embodiment, the operating mechanism is mounted to an access door of the pump which cannot be closed until the peristaltic mechanism is engaged with the tubing. When the door is closed, the operating mechanism automatically moves the valve to the flow position. When the access door is opened, the mechanism automatically moves the valve to the flow stop position. The pumping mechanism cannot be disengaged from the tubing without first opening the access door, which automatically closes the valve as described above. In one embodiment, the access door includes a retractor arm and a block for selectively operating the valve handle.

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Escondido, CA, United States of America

Spyros Kasvikis