Patent ID: 9334969
Filing Date: 2016-05-10
CPC Classification: F16K

Claim Text:
1. A pinch valve comprising: a hose-like valve element with a longitudinal axis; an actuating element that is disposed in the area of the outer circumference of the valve element and which is rotatable relative to the valve element in the circumferential direction thereof while executing an actuating movement; and at least one plunger which is disposed between the valve element and the actuating element for pinching the valve element, the plunger being movable transversely relative to the longitudinal axis of the valve element while executing an operating movement toward the inside in the direction to the valve element or opposite thereto toward the outside, wherein the actuating element includes a helical groove longitudinally formed in an inner surface thereof, the groove having a changing depth in the direction of the longitudinal axis and further defining at least one actuating surface directed toward the valve element and serving for a pressing application of force of the at least one plunger directed toward the inside, the at least one actuating surface sliding along the at least one plunger when executing the actuation movement and having a longitudinal profile extending at least in part in the circumferential direction of the valve element with a changing spacing in relation to the valve element, wherein the actuating movement of the actuating element is a combination of a rotational movement and of an axial displacement movement.