Patent ID: 6079628
Filing Date: 2000-06-27
Classification: G05D

Abstract:
A self-contained, temperature and pressure operated pinch valve in which the path of fluid flow through said valve may be automatically controlled by the temperature and pressure of a flow material, said pinch valve comprising:(a) a flow transport path for fluid flow through said valve,said flow transport path including a flexible tube surrounding and defining at least a portion of said flow transport path, said flexible tube adapted to alternatively decrease the fluid flow in that portion of said flow transport path defined by said flexible tube upon an increase of pressure on a surface of the flexible tube or increase the fluid flow in the path upon a decrease of pressure on a surface of the flexible tube; and,(b) a sensor within the flow transport path in direct temperature communication with the flow material; and,(c) a closure in direct operative communication with said flexible tube in operative communication with said sensor;wherein, said closure is adapted to provide operative pressure upon said flexible tube in response to changes in the temperature as determined by said sensor and line pressure of the flow material.