A flow regulating valve device providing continuous flushing of intravascular catheters with a flushing solution at either a restricted normal slow flow rate or intermittently at a catheter flush-out fast flow rate. The valve device has a cylindrical drum element rotatably mounted within a cylindrical...http://www.google.com/patents/US4645496?utm_source=gb-gplus-sharePatent US4645496 - Continuous catheter flushing flow control device
