Patent ID: 8439880
Filing Date: 2013-05-14
Classification: A61M

Abstract:
1. A flow control system comprising: a drip chamber having a lower wall section, an upper wall section and a collapsible wall extending between the lower wall section and the upper wall section; a downwardly depending valve seat attached to the lower wall section, the drip chamber forming a downstream opening in fluid communication with the valve seat; a valve member disposed in the drip chamber and attached to the upper wall section and having a valve surface engageable with the valve seat; and a driver rotatably engaged to each of the upper wall section and the lower wall section; wherein upon rotation of the driver in a first direction, the collapsible wall of the drip chamber moves axially between a collapsed condition in which the valve seat is sealingly engaged with the valve surface and an extended condition in which the valve seat is sufficiently spaced from the valve surface to form a fluid passageway between the valve surface and the valve seat and permit flow through the opening of the drip chamber.