Baxter International Inc.

Sharp Kabushiki Kaisha Corporation

Roberta Scola

Dan Hamilton

Joseph B Matthews

Joseph A Bancsi

Charles C Tseng

Mark Senninger

Eric Myren

Nobuaki Goi

Dannie E Hamilton

Michael S Fairchild

Ken Lynn

A peristaltic pump assembly for pumping a fluid medium from a fluid source through a tubing having a compressible pumping section, which assembly comprises a housing including at least one support wall; a drive shaft journalled substantially loosely to the support wall; a plurality of cam plates eccentrically mounted on the drive shaft in a helical pattern along the drive shaft and rotatable together with the drive shaft for, during a rotation of the drive shaft, driving finger plates sequentially in a direction perpendicular to the drive shaft to cause respective finger tips of the finger plates to engage the pumping section thereby producing a moving zone of occlusion along the pumping section for pumping the fluid medium; and an adjustment mechanism mounted on the support wall for adjustably displacing the drive shaft together with the cam plates and the finger plates in a direction perpendicular thereto. The adjustment mechanism comprises a shaft bearing plate mounted on the support wall for movement in a linear direction parallel to the direction of movement of each finger plate and through which the drive shaft extends rotatably, and a drive member for adjustably moving the bearing plate in the linear direction.

Peristaltic pump assembly

An intravenous metering device is provided which includes an air retention chamber in downstream fluid communication with a source of fluid and in upstream fluid communication with a pumping chamber. A first valve is provided between the air retention chamber and the pumping chamber to control access to the pumping chamber. A second valve is provided to control the exit of fluid from the pumping chamber. The valves include a shared diaphragm portion. A safety mechanism as provided to prevent accidental free flow of fluid through the metering device. In a first preferred embodiment of a safety mechanism, a gradually tapered priming stem is provided attached to the diaphragm portion of the second valve. In a second preferred embodiment of a safety mechanism, a priming stem is provided attached to the diaphragm portion of the second valve and a priming stem release mechanism is further provided.

Intravenous metering device

An intravenous metering device is provided which includes an air retention chamber in downstream fluid communication with a source of fluid and in upstream fluid communication with a pumping chamber. A first valve is provided between the air retention chamber and the pumping chamber to control access to the pumping chamber. A second valve is provided to control the exit of fluid from the pumping chamber. The valves include a shared diaphragm portion.

The present invention provides an intravenous administration set 10 having a primary container 22 and a secondary container 24, each containing fluid, and a pump 20. The primary container 22 and secondary container 24 are joined into a single flow path by a Y-site 50. A check valve 42 is provided between the primary container 22 and the Y-site 50. A fluid capacitor 60 is provided on the single flow path between the Y-site 50 and the pump 20 to repenish displaced fluid in the pump 20.

Dual source intravenous administration set having an intravenous pump

Growing community of inventors

Roselle, IL, United States of America

Roberta Scola