Inline non-invasive pressure monitoring system for pumps

Details Inline non-invasive pressure monitoring system for pumps Inline non-invasive pressure monitoring system for pumps

1992-12-31

1994-08-09

Bertsch, Richard A.

Pumps

Condition responsive control of pump drive motor

Single motor control element responsive to means sensing...

417474, 604153, F04B 4902

Patent

active

053360516

ABSTRACT:
The invention is a pressure sensitive valve that in different forms can be used to provide: an adjustable resistance to flow, adjustable positive or negative pressure relief, negative pressure isolation, isolation of pressure sensitive devices (e.g. pressure monitors) from blood and controlled recirculation between the inlet and outlet of pumps, particularly extracorporeal circulation. The construction of the valve is especially advantageous for extracorporeal circuits, the valve is made from one continuous length of tubing, thereby providing a valve that is more reliable, safer, and has fewer parts. A simple, compact and disposable system to adjust, regulate, and indicate negative or positive pressure applied to the valve is so described.

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patent: 5024347 (1991-06-01), Baldwin

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