Patent ID: 8622365
Filing Date: 2014-01-07
Classification: F16K

Abstract:
1. A pinch valve comprising: a body; an elastic conduit supported in the body and through which a fluid flows; a solenoid connected to the body and having a coil, the solenoid being excited by energizing the coil, for attracting a movable iron core toward a fixed iron core; a valve mechanism having a valve plug disposed to face toward the conduit and which is displaceable along an axial direction of the body, wherein the valve mechanism presses the valve plug toward the conduit by excitation of the solenoid, and wherein the conduit applies a reactive force against the valve plug pressed toward the conduit by the valve mechanism; and elastic means for providing a net force, other than said reactive force, acting on the movable iron core, that urges the movable iron core toward the fixed iron core, wherein said elastic means comprises all elements of the pinch valve applying an elastic force, other than the reactive force, to the movable iron core, wherein the movable iron core is urged by the net force of the elastic means toward the conduit when the solenoid is not excited, and the net force of the elastic means assists the excitation of the solenoid in pressing the valve plug toward the conduit, and wherein by displacement of the valve plug toward the conduit, the conduit is clamped between the valve plug and the body, to thereby interrupt the flow of the fluid.